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WO2025021476A1 - Procédé de compensation et système optique - Google Patents

Procédé de compensation et système optique Download PDF

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Publication number
WO2025021476A1
WO2025021476A1 PCT/EP2024/068988 EP2024068988W WO2025021476A1 WO 2025021476 A1 WO2025021476 A1 WO 2025021476A1 EP 2024068988 W EP2024068988 W EP 2024068988W WO 2025021476 A1 WO2025021476 A1 WO 2025021476A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical system
projector
prescription lens
optical
lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/068988
Other languages
English (en)
Inventor
Robin KAECH
Frédéric MONTFORT
Carlos MACIAS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ams Osram AG
Original Assignee
Ams Osram AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ams Osram AG filed Critical Ams Osram AG
Publication of WO2025021476A1 publication Critical patent/WO2025021476A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B2027/0178—Eyeglass type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/08—Auxiliary lenses; Arrangements for varying focal length
    • G02C7/086—Auxiliary lenses located directly on a main spectacle lens or in the immediate vicinity of main spectacles

Definitions

  • a compensation method in particular a method to compensate for effects of prescription lens effects in an optical system is specified, for example in an off-axis AR (augmented reality) system. Further, an optical system is specified.
  • AR glasses are required to account for ophthalmic correction (Rx prescription) for the user. This typically involves adding/shaping/molding a prescription lens with curvature either on the world side of the glasses, which is usually considered unesthetic, or on the user side of the glasses, or a combination of both.
  • This document relates 2023PF00907 July 5, 2024 P2023,0986 WO N - 2 - both to AR and user eyesight compensation.
  • the document describes a spatial light modulator (SLM) mounted on the AR glasses lens.
  • SLM spatial light modulator
  • the SLM is used both to generate an image and to compensate it for the user’s personal prescription needs dynamically.
  • the real world image apparently still needs to be corrected by a standard lens, presumably positioned before the SLM.
  • Document DE 102015 219 859 A1 describes an apparatus and a method for an AR display, the entire disclosure content of which is hereby incorporated by back-reference.
  • the document presents a video pass-through AR mask which acquires the light-field data from the outside and merge it with a virtual light-field image.
  • Document JP 2011227431 A describes a prescription lens assembly for viewing three-dimensional images, the entire disclosure content of which is hereby incorporated by back- reference.
  • the document presents a system with attachable prescription lenses mounted on the user side of 3D viewing glasses, which is not directly related to AR.
  • Document KR 20210101007 A relates to prescription glasses with detachable subject glasses, the entire disclosure content of which is hereby incorporated by back-reference. Similar to JP 2011227431 A, the document presents “prescription glasses that are attachable and detachable to target glasses”. It is not specifically for AR.
  • An object to be solved is to provide a method that allows for adapting an optical system to user specific needs due to 2023PF00907 July 5, 2024 P2023,0986 WO N - 3 - ametropia. Further, an optical system addressing user specific needs is to be specified.
  • a compensation method in particular to compensate for effects of a prescription lens (also referred to in the following as Rx lens or Rx insert) in an optical system is specified.
  • the optical system comprises a projector (also referred to in the following as projection system) configured to produce a projected light.
  • the projector comprises one or more light sources such as light emitting diodes (LEDs) or lasers, for example edge emitting lasers or surface emitting lasers such as VCSELs (Vertical Cavity Surface Emitting Lasers).
  • the projected light includes or consists of light in the visible spectral range.
  • the optical system comprises a deflection optic configured to deflect the projected light towards a user’s eye.
  • the deflection optic may be arranged in a field of view of the user.
  • the deflection optic may comprise one or more optical elements, for example relying on at least one of: reflection, refraction, diffraction.
  • the prescription lens is arranged on a user side of the 2023PF00907 July 5, 2024 P2023,0986 WO N - 4 - deflection optic.
  • the prescription lens is arranged in a beam path of the projected light between the projector and the user’s eye.
  • the prescription lens may be a separate optical element attached to the deflection optic.
  • the prescription lens may be integrated into the deflection optic or a section of the deflection optic.
  • the method includes a step of partially correcting the optical aberrations induced by an added Rx lens.
  • the Rx lens is configured to correct at least one of: defocus, coma, astigmatism.
  • the method includes a step of restoring the correct position of the projected light with respect to the nominal target.
  • the addition of the Rx lens changes the light path, and the first compensation method can also affect it.
  • This step may also be referred to as second step.
  • a shift in a position of the projected light caused by the prescription lens may be completely or at least partially compensated for by means of this method step.
  • the method includes a step of redesigning at least a section of the deflection optic to account for changes in an optical function of the optical system.
  • a section or the whole deflection optic may be redesigned, for example to account for the remaining changes in the 2023PF00907 July 5, 2024 P2023,0986 WO N - 5 - optical function.
  • This step may also be referred to as third step or final step. This could typically include local shifts in incidence angles with respect to the nominal target. In the case of a diffractive element, this method step helps for example in maximizing the diffraction efficiency after the Rx lens.
  • the terms “first step, second step, and third step” are used to distinguish the different steps and do not necessarily specify a temporal order of the steps. Furthermore, the term “second step” does not require the first step to be performed before.
  • the second step may be the only step or the step to be performed first.
  • the third step comprises at least one of the following steps: A) at least partially correcting optical aberrations induced by the prescription lens; B) at least partially restoring a correct position of the projected light with respect to a nominal target; C) redesigning at least a section of the deflection optic to account for changes in an optical function of the optical system.
  • the method includes at least two of the above method steps, in particular a 2023PF00907 July 5, 2024 P2023,0986 WO N - 6 - conjunction of the three method steps, for example to compensate for performance losses induced by the addition of an Rx lens in front of a deflection optic such as an AR optics.
  • the compensation steps the different effects of an added Rx correction element on the projected wavefront may be corrected.
  • These method steps can be used in conjunction to enable for a better compensation of the overall effect of the Rx lens.
  • the compensation may be split into three parts: (1) the optical function correction, (2) the positioning, and (3) the system response correction.
  • the nominal target is considered to be that of the system design without an Rx lens.
  • the first solution proposed here is to add an additional correction element to the projection system (a projector correction element), which would partially amend the changes induced by the Rx insert at the surface of the diffractive element.
  • This correction element could be a simple lens, a freeform lens, a diffractive element or the like or a combination of such elements.
  • the element may be positioned at the projection pupil or elsewhere in the optical path and may be tilted with respect to the projection optical axis or not.
  • step C is then to design the deflection optic such as an AR element to account for these changes while keeping its response close to the nominal one. This enables for example in the case of a diffractive element to maximize the diffraction efficiency considering the modified light input.
  • the method comprises least two of steps A), B), C).
  • the method may comprise exactly two of the steps, for example, the method comprises the steps A) and B), or the steps A) and C) or the steps B) and C).
  • Different effects of the prescription lens may be compensated for by two different steps resulting in an enhanced compensation.
  • the method comprises steps A), B), and C). Using these three steps a particularly precise compensation of effects caused by a prescription lens may be obtained.
  • step B) at least one of the projected light and the deflection optic is manually or automatically shifted with respect to a nominal design of the optical system without a prescription lens.
  • an effect of the Rx insert is to shift the 2023PF00907 July 5, 2024 P2023,0986 WO N - 8 - projected light pattern with respect to the nominal target (step B) or second step).
  • a lateral offset may be added between the projection system and the Rx insert/diffractive element combination. This can be achieved by shifting either of those compared to the nominal design, for example mechanically in the final system or during fabrication.
  • the same effect can be also be achieved optically by using an optical element such as a glass window at the right angle and correct thickness, a tunable lens, etc... In this case, parts 1 and 2 may be merged together.
  • the compensation of step A) and the compensation of step B) may be obtained by a common part of the optical system resulting in these corrections.
  • at least one of steps A), B), C) is performed prior to a production of the optical system.
  • the produced optical system may be configured to compensate for the user-specific prescription lens.
  • the produced optical system may be tunable to account for effects of different prescription lenses.
  • the optical system comprises a prefabricated part based on a nominal design without a prescription lens, and wherein at least one of steps A), B), C) is performed to adapt the nominal design to the prescription lens.
  • the prefabricated part of the optical system may be fully operable for a user who does not require a prescription lens.
  • the prefabricated part may require at least one further optical component.
  • the prefabricated part and one or more further optical components may be 2023PF00907 July 5, 2024 P2023,0986 WO N - 9 - provided to the user as a kit, so that the user may assemble the optical system to at least partly correct the user- specific ametropia.
  • the kit includes different further optical components configured to correct different degrees of short-sightedness and/or far-sightedness.
  • the prefabricated part of the optical system comprises a frame, wherein the projector is mounted to the frame with a translation degree of freedom for the projected light.
  • step B) may be performed by shifting the projected light or the projector itself with respect to the frame based on the user-specific ametropia. This may be done during a fitting session or by the user.
  • the prefabricated part comprises at least part of the deflection optic.
  • the prefabricated part of the deflection optic is mounted to the frame of the optical system.
  • the prescription lens and/or a further part of the deflection optic is configured to be arranged on the user side of the prefabricated part of the deflection optic.
  • the prescription lens and the further part of the deflection optic are formed as a combined optical element.
  • the entire deflection optic may be configured to be mounted to the prefabricated part of the optical system.
  • the deflection optic is configured to be mounted to the frame of the optical system at a predetermined position of the frame, for example by means of a mechanical and/or magnetic connection. 2023PF00907 July 5, 2024 P2023,0986 WO N - 10 -
  • an optical system is specified, in particular an optical system for a head-worn device.
  • the optical system is a customized product adapted to a user- specific ametropia.
  • the optical system may be provided ready to use or as a kit which is to assembled by the user or a service provider such as an optician.
  • the optical system may be configured to be customizable to users having different degrees of ametropia.
  • the optical system comprises a projector configured to produce a projected light during operation of the optical system.
  • the projector is mounted to a frame of the optical system.
  • the frame is part of glasses, of a headset or of a helmet of a head-worn device.
  • the projector is mounted to a part of the frame that extends along a side of the user’s head such as a stem of a frame of glasses.
  • the optical system comprises a deflection optic configured to deflect the projected light towards a user’s eye.
  • the deflection optic is arranged in a field of view of the user during operation of the optical system.
  • the optical system comprises a prescription lens or the optical system is configured for mounting a prescription lens.
  • the prescription lens is arranged on a user side of the deflection optic or the prescription lens is configured to be arranged on a user side of the deflection optic.
  • the prescription lens is configured to reduce the user’s ametropia.
  • the prescription lens 2023PF00907 July 5, 2024 P2023,0986 WO N - 11 - completely eliminates the user’s ametropia.
  • the optical system comprises a projector correction element or the optical system is configured for mounting a projector correction element.
  • the projector correction element is arranged in a beam path between the projector and the deflection optic, the projector correction element being configured to at least partially correct optical aberrations induced by the prescription lens.
  • the projector correction element is configured to compensate for effects on the image to be produced by the projector caused by the prescription lens as the projected light passes through the prescription lens.
  • the optical system is configured to compensate for a shift of the projected light with respect to a nominal target induced by the prescription lens.
  • a lateral shift of the projected radiation induced by the prescription lens as the projected light passes through the prescription lens can be at least partly or even fully compensated for.
  • the nominal position of the projected light in an optical system without a prescription lens may be restored.
  • the projector and/or an optical element between the projector and the deflection optic is shiftable with respect to the deflection optic.
  • the projector and/or an optical element between the projector and the deflection optic is shiftably mounted to the frame of the optical system.
  • At least a section of the deflection optic is configured to reduce changes in an optical function of the optical system induced by the prescription lens.
  • at least a part of the deflection optic is customized to the user-specific ametropia.
  • the section of the deflection optic is configured to reduce local shifts in incidence angles with respect to the nominal target.
  • the deflection optic comprises a diffractive element, wherein the section of the deflection optic is configured to maximize the diffraction efficiency after the prescription lens.
  • the optical system comprises: - a projector configured to produce a projected light during operation of the optical system; - a deflection optic configured to deflect the projected light towards a user’s eye; wherein - the optical system comprises a prescription lens or the optical system is configured for mounting a prescription lens, wherein the prescription lens is arranged on or configured to be arranged on a user side of the deflection optic, wherein the prescription lens is configured to reduce the user’s ametropia; and - at least one of the following features (i), (ii), (iii) applies: (i) the optical system comprises a projector correction element or the optical system is configured for mounting a projector correction element, wherein during operation of the optical system the projector correction element is arranged in a beam path between the projector and the deflection optic, the projector correction element being configured to 2023PF00907 July 5, 2024 P2023,0986 WO N - 13 - at least partially correct
  • the projector is mounted on a frame, wherein the prescription lens is configured to be reversibly attachable to the frame.
  • the prescription lens and at least a part of the deflection optic are formed in a combined optical element.
  • the prescription lens may be a separate optical element attached to the deflection optic during operation.
  • the projected light is shiftable with respect to the deflection optic.
  • the projector correction element is reversibly mountable in the beam path.
  • the projector correction element is adjustable for different prescription lenses.
  • the projector correction element is manually or electronically adjustable.
  • the optical system is customizable to users having different degrees of ametropia. 2023PF00907 July 5, 2024 P2023,0986 WO N - 14 -
  • the deflection optic comprises a combiner configured to transmit ambient light from the user’s field of view.
  • the user sees within his field of view the real world overlaid with an image provided by the projector.
  • the so-called pancake solution may be used as combiner.
  • This solution has been filed as patent application PCT/EP2023/054758, published as WO 2023 / 161455 A1, the entire disclosure content of which is hereby incorporated by back-reference.
  • the optical system may be configured based on the method described above.
  • the method and the optical system in particular enable the proper integration of Rx lenses in optical systems such as AR glasses on the user side using an off-axis projection system.
  • the availability of three methods to achieve the Rx compensation possesses several advantages: Having different compensation methods working together provides a better control of the global effect and a better result than if one were to do it only with a single method.
  • the solution enables more flexibility through the fabrication of modular components. For example, generic glass frames with a translation degree of freedom on the projection system for the translation compensation may be used.
  • the frame may contain the AR optics except for the first AR element.
  • the 2023PF00907 July 5, 2024 P2023,0986 WO N - 15 - missing parts may be comprised of the Rx lens mounted on the first compensated AR element, and the matching projection optic compensating element. These elements may be mounted on the frame (for example magnetically, with glue, etc8) and adjust the projector positioning to fit the AR glasses to any user. This may be done for example during a user fitting session during acquisition, as is the case for standard prescription glasses, or may be done dynamically if those AR glasses are to be shared between multiple users.
  • the prescription lens can be inserted in or attached on top of the first AR element.
  • the method and/or the optical system may be used for AR or VR devices such as AR or VR glasses or for prescription glasses or combiners.
  • the effects described above in connection with an AR optical system may also apply to other optical systems such as VR devices. Further, it may be used for at least one of ophthalmic (Rx) correction, hologram recording, volume phase holograms, holographic optical elements, diffractive elements, AR/VR combiner, AR/VR glasses.
  • the optical system comprises a prescription lens and a projector correction element.
  • the optical system may comprise at least one of the following elements and combinations thereof:
  • the projector correction element may comprise or consist of a diffractive optical element. 2023PF00907 July 5, 2024 P2023,0986 WO N - 16 -
  • the projector correction element may comprise or consist of a simple lens.
  • the projector correction element may comprise or consist of a freeform lens.
  • the projector correction element may comprise or consist of a combination of the above.
  • the projector correction element may comprise or consist of a single or multiple optical elements.
  • the projector correction element may be removable from the projector and may have a binding system that may consists of precision magnetic, mechanical bindings, or others.
  • the projector correction element may also be directly integrated to the projector optics, and in this case the projector may be designed for a specific Rx compensation.
  • the projector correction element may be integrated in the projection optics to be adjustable, for example manually or electronically to compensate for multiple Rx compensations.
  • the complete projection system (including the correction element) may be manually or automatically shifted with respect to the nominal design with a stage, rail system, slider, etc...
  • the complete projection system may have a fixed shift with respect to the nominal design using a spacer, adapting the frame design, etc...
  • the exit pupil of the complete projection system can be optically shifted with respect to the nominal 2023PF00907 July 5, 2024 P2023,0986 WO N - 17 - design using a manual or automated actuator, for example a moveable lens, an electromagnetically tunable lens, an Alvarez lens, a glass slab, etc...
  • the first AR element design can be optimized to maximize performance with a specific Rx correction.
  • the first AR element design can be optimized to maximize performance within a range of Rx corrections.
  • the first AR element can be integrated to the Rx correction insert, and the combined element can be bound to the glass frame through a mechanical or magnetic binding system.
  • the first AR element can be integrated to both the main frame part and the Rx insert. In this case, each custom frame may be designed for a targeted Rx correction.
  • the first AR element can have a flat, curved or freeform geometry.
  • Figure 1B shows a detail of Figure 1A at the image plane.
  • Figure 2 shows an example of a system with an added positive lens (+8D) in front of first AR element.
  • Figure 3 shows an example of a system with an added corrective lens at a projection pupil.
  • Figure 4 shows an example of a system with a corrected positioning by adding a small shift.
  • Figure 5 shows an example of a system with the same type of compensation with added negative lens (-8D).
  • Figure 6A shows an example of a third compensation step.
  • the AR element is designed to account for remaining mismatch with nominal design.
  • Figure 6B shows a corresponding example of the nominal design.
  • Figure 7A shows an example of a double projector correction element compensation with added negative lens (-8D).
  • Figure 7B shows a detail of Figure 7A.
  • Figure 8 shows an example of AR glasses in top view, nominal configuration.
  • Figure 9 shows an example of an optical system for AR glasses in top view, compensated Rx configuration.
  • Figure 10 shows the so-called pancake solution for a deflection optic showing the two optical elements and how they combine into a single optical system. 2023PF00907 July 5, 2024 P2023,0986 WO N - 19 -
  • the elements illustrated in the figures and their size relationships among one another are not necessarily true to scale. Rather, individual elements or layer thicknesses may be represented with an exaggerated size for the sake of better representability and/or for the sake of better understanding.
  • Figure 1A illustrates beam paths of a projected light 29 produced by a projector (not shown in Figure 1A) of a nominal design 19.
  • a projector not shown in Figure 1A
  • the image plane is a deflection optic 3 such as an optical element for augmented reality.
  • a pupil 93 of the projected light 29 is arranged between the projector lens 21 and the image plane 92.
  • Figure 1B illustrates an image plane zoom-in of Figure 1B.
  • a center beam 291 is imaged onto a nominal target 98 on the image plane 92.
  • Figure 2 illustrates the case where a prescription lens 4 is added to the nominal design.
  • the prescription lens 4 has an optical power of +8 dpt.
  • An added positive lens may be used to correct farsightedness.
  • the figure illustrates that the projected 2023PF00907 July 5, 2024 P2023,0986 WO N - 20 - fields are no longer in focus. Further, the projected fields are shifted with respect to the nominal design 19.
  • the center beam 291 is shifted on the image plane 92 with respect to the nominal target 98.
  • Figure 2 illustrates the case for a high degree of farsightedness, but the effects also occur for lower degrees of farsightedness or for negative lenses to correct nearsightedness.
  • a projector correction element 25 is arranged in a first method step in the beam path between the projector and the image plane, for example at the pupil of the projector. Due to the projector correction element 25, the projected fields are now close to focus. However, the projected fields are still shifted.
  • a shift 95 is illustrated in Figure 3 using an arrow for the shift of the center beam 291 on the image plane 92 with respect to the nominal target 98. As illustrated in Figure 4 this shift can be reduced or even be eliminated by shifting the projected light 29 with respect to the deflection object located in the image plane 92.
  • the projected fields are now close to the nominal condition.
  • Figure 5 illustrates that the same type of compensation can be obtained if the prescription lens 4 is an added negative lens.
  • the negative lens has an optical power of -8 dpt. 2023PF00907 July 5, 2024 P2023,0986 WO N - 21 -
  • the projected fields on a bottom surface of the prescription lens 4 is close to the nominal condition.
  • FIG. 6A and 6B A third method step is illustrated in Figures 6A and 6B, wherein Figure 6A represents a design with a negative prescription lens 4 as in the previous Figures, whereas Figure 6B illustrates the nominal design without a prescription lens.
  • the third compensation step may design the deflection optic 3, for example an AR optical element, to account for the remaining mismatch with respect to the nominal design 19.
  • Figures 7A and 7B illustrate an exemplary embodiment where effects of an added negative lens as prescription lens 4 are compensated for by a double projector correction element compensation.
  • the prescription lens 4 has an optical power of -8 dpt.
  • a corrective freeform element 28 is arranged between the object plane 91 and the projector lens 21.
  • the projector correction element 25 is arranged at the pupil of the projected radiation 29.
  • the prescription lens 4 is shifted in order to account for the shift induced by the prescription lens 4. 2023PF00907 July 5, 2024 P2023,0986 WO N - 22 -
  • a method is described wherein three compensation steps are performed in order to account for optical effects caused by an added prescription lens with respect to a nominal design. However, depending on the specific requirements, it may also be sufficient to perform only two of these compensation steps or even only one of these compensation steps.
  • Figure 8 illustrates an exemplary embodiment of an optical system 1 for a head-worn device 10.
  • the head- worn device 10 is a pair of glasses for augmented reality applications.
  • the figure illustrates a top view onto a nominal configuration of the optical system 1 which is in a state ready to use for a normal sighted person.
  • the optical system 1 comprises a projector 2 to be used as an off-axis projection onto a deflection optic 3A for the nominal design.
  • the deflection optic 3A deflects the projected radiation 29 produced by the projector 2 towards the user’s eye.
  • 2023PF00907 July 5, 2024 P2023,0986 WO N - 23 - Figure 8 further illustrates an unmounted projection correction element 25 and an unmounted prescription lens 4 with a deflection optic 3B for a customized optical system.
  • the deflection optic 3B is matched to the prescription lens 4 in order to reduce changes in an optical function of the optical system 1 induced by the prescription lens 4.
  • the prescription lens 4 and the projector correction element 25 comprise a binding system 65 for mounting these further components 61 to a prefabricated part 6 of the optical system 1.
  • the binding system 65 comprises a precision magnetic system or mechanical bindings such as a snap-fit connection.
  • the prefabricated part 6 may comprise counterparts for the respective binding system 65 (not shown in the figures).
  • the further component 61 can be mounted at a predetermined position of the prefabricated part 6 of the optical system 1.
  • the prefabricated part 6 comprises a frame 5 with glass lenses 52 and the projector 2 mounted to the frame 5, in particular to a stem 51 of the frame 5.
  • the projector 2 is movably mounted with respect to the frame 5 by means of a sliding element 67.
  • the deflection optic 3A of the nominal system likewise comprises a binding system 65 so that the deflection optic 3A of the nominal system 3 is removable from the frame 5.
  • Figure 9 shows the situation where the optical system 1 is customized to the user by means of the user-specific prescription lens 4. 2023PF00907 July 5, 2024 P2023,0986 WO N - 24 -
  • the deflection optic 3A of the nominal system is unmounted and replaced with the prescription lens 4 including the matched deflection optic 3B of the customized system. If the deflection optic 3 comprises several parts, one or more parts thereof may remain in the frame 5 and be used for the customized optical system as well.
  • the projector correction element 25 is mounted to the prefabricated part 6.
  • the entire projection system including the projector 2 and the projector lens 21 as well as the projector correction element 25 may be shifted with respect to the frame 5 using sliding element 67.
  • the shift of the projected light 29 with respect to a normal target induced by the prescription lens 4 can be compensated for as described in connection with Figure 4.
  • the customized optical system 1 comprises a projector correction element 25 configured to at least partially correct optical aberrations induced by the prescription lens 4 and a means to compensate for a shift of the projected light 29 with respect to a nominal target induced by the prescription lens 4, namely sliding element 67.
  • the deflection optic 3 is specifically designed to reduce changes in the optical function of the optical system 1 induced by the prescription lens 4.
  • the optical system 1 may also include only one or only two of these compensation means.
  • shifting the projected light 29 may also be obtained by providing a suitable spacer between the frame 5 and the projector 2 or by arranging an optical element such as a glass plate in the beam path between the projector 2 and the optic 3.
  • the optical system 1 may be configured such that it is adjustable for different prescription lenses 4 so that the optical system 1 is dynamically adjustable to different users.
  • the optical system 1 may comprise tunable optical elements such as a tunable projector correction element 25 or a tunable projector lens 21.
  • the projector correction element 25 may also be integrated into the projector lens 21.
  • the optical system 1 is configured such that a prefabricated part 6 of the optical system 1 can be adapted to user-specific needs by mounting one or more further components 61 to the prefabricated part 6 and by appropriately shifting the projected light 29. These steps can be performed by the user or during a fitting session, for example by an optician.
  • the optical system 1 may be provided as a kit including the prefabricated part 6 and one or more further components 61 configured to compensate for the user-specific ametropia.
  • the kit may also comprise several further components 61 configured to compensate for different degrees of ametropia.
  • the optical system 1 can be customized by selecting the prescription lens 4 from the kit, whose optical power addresses the user’s ametropia best.
  • This selected prescription lens 4 may be mounted to the prefabricated part 6 together with the appropriate further components 61 contained in the kit in order to correct the effects of the prescription lens, for example an appropriate projector correction lens 21 or an appropriate spacer for the projector 2.
  • the optical system 1 may be produced at least partly based on the specific user needs, for example based on data provided by the user or obtained during a fitting session. In this case, reversible binding systems 65 or movable elements such as sliding element 65 may be dispensed with.
  • FIG 10 illustrates an exemplary embodiment of a deflection optic 3 which may be used in the optical system 1 described in connection with the previous figures.
  • the deflection optic 3 is a combiner 30 configured to transmit ambient light 7 from a user’s field of view 70 towards an eye 99 of the user.
  • the deflection optic 3 comprises a first optical element 31 as a world-facing element and a second optical element 32 as a user-facing element.
  • the second optical element 32 comprises a polarization reflector 321 and a holographic pupil splitter 322.
  • the prescription lens 4 is arranged on the user side 39 of the combiner 30.
  • the user-facing second optical element 32 of the deflection optic 3 may be combined with a prescription lens 4 as a further component 61 and the first optical element 31 of 2023PF00907 July 5, 2024 P2023,0986 WO N - 27 - the deflection optic 3 may be mounted to the frame 5, for example as a part of the prefabricated part 6. If any Rx can be fully realized on the optical element in the world facing frame element, this solution also enables to implement Rx correction on the user side. This allows for a high degree of customization. As illustrated in Figure 10, the ambient light 7 passes the combiner 30 only once. In particular, the optical combiner 30 does not or at least not significantly impede the user’s vision of the scene within the field of view 70.
  • the optical combiner 30 is configured to reflect and control the divergence of the projected light 29 so that the projected light traverses the combiner 30 four times and exits the combiner 30 at the user side 39.
  • the user sees the ambient light within they field of view superimposed with the projected light 29 of the projector 2.
  • the holographic pupil splitter 322 which comprises for example a volume phase hologram, the eyebox can be expanded.
  • the deflecting optic 3 does not necessarily have to transmit the ambient light 7.
  • the optical system may be configured to virtual reality applications.
  • optical system 10 head-worn device 19 nominal design 2 projector 21 projector lens 25 projector correction element 28 corrective freeform element 29 projected light 291 center beam 3 deflection optic 3A deflection optic of nominal system 3B deflection optic of customized system 30 combiner 31 first optical element 32 second optical element 321 polarization reflector 322 holographic pupil splitter 39 user side 4 prescription lens 5 frame 51 stem 52 glass 6 prefabricated part 61 further component 65 binding system 66 arrow 67 sliding element 7 ambient light 70 field of view 91 object plane 92 image plane 2023PF00907 July 5, 2024 P2023,0986 WO N - 30 - 93 pupil 95 shift 98 nominal target 99 eye of user

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

L'invention concerne un procédé de compensation pour compenser les effets d'une lentille de prescription (4) dans un système optique (1) comprenant un projecteur (2) configuré pour produire une lumière projetée (29) et une optique de déviation (3) configurée pour dévier la lumière projetée (29) vers l'œil d'un utilisateur (99), la lentille de prescription (4) étant disposée sur un côté utilisateur (39) de l'optique de déviation (3), comprenant au moins l'une des étapes suivantes : A) corriger au moins partiellement des aberrations optiques induites par la lentille de prescription (4) ; B) restaurer au moins partiellement une position correcte de la lumière projetée (29) par rapport à une cible nominale (98) ; C) reconcevoir au moins une section de l'optique de déviation (3) pour tenir compte des changements dans une fonction optique du système optique (1). En outre, un système optique (1) est spécifié.
PCT/EP2024/068988 2023-07-21 2024-07-05 Procédé de compensation et système optique Pending WO2025021476A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102023119407.0 2023-07-21
DE102023119407 2023-07-21
DE102023129515.2 2023-10-26
DE102023129515 2023-10-26

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WO2025021476A1 true WO2025021476A1 (fr) 2025-01-30

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JP2011227431A (ja) 2010-04-22 2011-11-10 Koriao Gee Case Company Ltd 立体（３ｄ）画像視聴用視力矯正レンズ組立体
WO2015032828A1 (fr) 2013-09-04 2015-03-12 Essilor International (Compagnie Generale D'optique) Procédés et systèmes de réalité augmentée
US9341850B1 (en) * 2013-04-30 2016-05-17 Google Inc. Diffractive see-through display with hybrid-optical aberration compensation
DE102015219859A1 (de) 2015-10-13 2017-04-13 Carl Zeiss Vision International Gmbh Vorrichtung und Verfahren für die AR-Darstellung
US10642043B2 (en) 2016-07-01 2020-05-05 Intel Corporation Holographic optical element design and manufacturing
US10890767B1 (en) * 2017-09-27 2021-01-12 United Services Automobile Association (Usaa) System and method for automatic vision correction in near-to-eye displays
KR20210101007A (ko) 2020-02-07 2021-08-18 이래에이엠에스 주식회사 볼 스플라인 구조를 갖는 드라이브 샤프트용 관형 샤프트의 제조 방법 및 그에 의해 제조된 관형 샤프트
US20220121280A1 (en) * 2017-12-03 2022-04-21 Frank Jones Enhancing the performance of near-to-eye vision systems
US20220269081A1 (en) * 2020-05-27 2022-08-25 Google Llc Freeform lens with integrated lightguide and method of manufacture
WO2023161455A1 (fr) 2022-02-25 2023-08-31 Ams International Ag Système optique d'afficheur à réalité augmentée

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011227431A (ja) 2010-04-22 2011-11-10 Koriao Gee Case Company Ltd 立体（３ｄ）画像視聴用視力矯正レンズ組立体
US9341850B1 (en) * 2013-04-30 2016-05-17 Google Inc. Diffractive see-through display with hybrid-optical aberration compensation
WO2015032828A1 (fr) 2013-09-04 2015-03-12 Essilor International (Compagnie Generale D'optique) Procédés et systèmes de réalité augmentée
DE102015219859A1 (de) 2015-10-13 2017-04-13 Carl Zeiss Vision International Gmbh Vorrichtung und Verfahren für die AR-Darstellung
US10642043B2 (en) 2016-07-01 2020-05-05 Intel Corporation Holographic optical element design and manufacturing
US10890767B1 (en) * 2017-09-27 2021-01-12 United Services Automobile Association (Usaa) System and method for automatic vision correction in near-to-eye displays
US20220121280A1 (en) * 2017-12-03 2022-04-21 Frank Jones Enhancing the performance of near-to-eye vision systems
KR20210101007A (ko) 2020-02-07 2021-08-18 이래에이엠에스 주식회사 볼 스플라인 구조를 갖는 드라이브 샤프트용 관형 샤프트의 제조 방법 및 그에 의해 제조된 관형 샤프트
US20220269081A1 (en) * 2020-05-27 2022-08-25 Google Llc Freeform lens with integrated lightguide and method of manufacture
WO2023161455A1 (fr) 2022-02-25 2023-08-31 Ams International Ag Système optique d'afficheur à réalité augmentée

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