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WO2018014276A1 - Appareil optique pour télémètre laser compact à haute définition - Google Patents

Appareil optique pour télémètre laser compact à haute définition Download PDF

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Publication number
WO2018014276A1
WO2018014276A1 PCT/CN2016/090794 CN2016090794W WO2018014276A1 WO 2018014276 A1 WO2018014276 A1 WO 2018014276A1 CN 2016090794 W CN2016090794 W CN 2016090794W WO 2018014276 A1 WO2018014276 A1 WO 2018014276A1
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Prior art keywords
laser
optical path
optical
plane mirror
lens
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PCT/CN2016/090794
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Chinese (zh)
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左罗
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders

Definitions

  • the invention belongs to the technical field of laser range finder, and in particular relates to an optical device of a compact laser range finder.
  • the prior art laser range finder generally has three independent optical systems: laser emission, laser reception, and visible light aiming.
  • the laser emitting system emits a laser beam to the target to be measured, and the scattered laser echo is received by the laser receiving system.
  • the measurement parameters such as the speed of light and the time difference are used to determine the distance between the target to be measured and the observation point.
  • the three independent optical systems need to occupy the corresponding transmission channels respectively. Since each has a certain volume, three independent optical systems occupy a large space. The prior art has improved on this, but there are drawbacks for various reasons.
  • application No. 99227057 a utility model patent entitled "Aiming Semiconductor Pulsed Laser Ranging Device", which uses only one laser beam splitting plane mirror, has the aim of aiming the optical axis offset and causing aberration non-uniformity and asymmetry. defect.
  • the application No. 201510898051.5 the Chinese patent application entitled “A laser range finder”, which applies a beam splitting prism to form a vertical structure between the aiming system and the optical axis of the laser emitting system, thereby increasing the volume of the overall structure. This is inconvenient for a civilian lightweight laser range finder.
  • Prior art laser ranging devices generally have an aiming system that cannot be used when the light is weak, especially at night, because it relies on visible light sighting and imaging.
  • Prior art laser ranging devices also have laser ranging and aiming coaxial optical systems, but they require the addition of many optical components, such as application number 201210434066.2, entitled “A Laser Ranging and Aiming Coaxial Light System”
  • the invention patent application includes an objective lens, a Bie prism set, a ranging cube prism, a projection cube prism and an eyepiece group which are sequentially distributed along the optical axis.
  • Numerous high-precision prisms are bound to add a lot of work to the manufacturing and assembly debugging.
  • the Behan prism group has three pieces of glue, and the processing and debugging work is large, which causes the cost of the product to rise sharply, and the maintenance is extraordinarily delicate.
  • it is very unsuitable.
  • the object of the present invention is to overcome the defects of imaging unevenness and asymmetry, large volume and unsuitable for night use in the prior art laser ranging device, and provide a laser ranging and aiming common optical axis system.
  • the laser range finder is compact in structure, small in size, low in part processing cost, and can be used all day.
  • An optical device of a high-definition compact laser range finder comprising a control circuit for observing an aiming optical path, a laser emitting optical path, a laser receiving optical path, and an OLED display projection optical path;
  • the observation aiming light path constituting element includes an imaging objective lens, a beam splitting plane mirror, a compensation plane mirror, and a half-fifth a prism, a roof prism, a full transmissive display, an eyepiece cemented lens, and an eyepiece single lens, each element being sequentially disposed;
  • the compensation plane mirror By setting the compensation plane mirror, the aberration non-uniformity and asymmetry generated by the single beam splitting mirror can be solved; at the same time, the cooperation of the two plane mirrors does not cause the optical paths of the objective lens and the eyepiece to translate;
  • the object image can be clearly displayed on the full-transparent display under the condition that the external light intensity is insufficient, so that the red and black display can be switched, and the device can be applied all the time;
  • the position of the display is at the focal plane;
  • the illuminating optical axis of the self-illuminating OLED display is set at an angle of 45° with the optical axis of the aiming optical path;
  • the splitting plane mirror and the compensating plane mirror are a pair of components having the same structure and symmetrically arranged; the optical axis of the object side light passing through the beam splitting plane mirror is corrected by the compensated plane mirror and is returned to the original optical axis, and the full transparent display is provided.
  • the observation aiming optical path and the laser receiving optical path are multiplexed on the same optical axis.
  • the constituent elements of the laser emitting optical path include a semiconductor laser, a focusing lens, a reflecting plane mirror, a beam splitting mirror, and an imaging objective lens, or include a semiconductor laser and a focusing objective lens.
  • the constituent elements of the laser receiving optical path include a focusing objective lens and an avalanche diode, or an imaging objective lens, a beam splitting plane mirror, a reflecting plane mirror, a focusing lens and an avalanche diode.
  • the constituent elements of the laser emitting optical path include the semiconductor laser and the focusing lens
  • the optical axis of the laser emitting optical path is perpendicular to the optical axis of the viewing aiming optical path
  • the constituent elements of the corresponding laser receiving optical path include a focusing objective lens and an avalanche diode.
  • an optical axis of the laser receiving optical path is perpendicular to an optical axis of the viewing aiming optical path; and constituent elements of the corresponding laser emitting optical path include a semiconductor laser and a focusing objective.
  • the OLED display projection light path is a dual display optical path, and the constituent elements thereof include a self-luminous OLED display, a projection optical path imaging lens, a compensation plane mirror, a half-pentagon prism, a roof prism, and a full-transparent display.
  • the OLED display projection light path is a single display optical path, and the constituent elements thereof include a self-luminous OLED display, a projection optical path imaging lens, a compensation plane mirror, a half-pentagon prism, and a roof prism.
  • the plane of the beam splitting mirror is at an angle of 67.5° with respect to the optical axis of the sighting light path.
  • the reflecting plane mirror is arranged in parallel with the beam splitting plane mirror.
  • the glued surface of the half-pentagon prism and the roof prism is at an angle of 42° with respect to the optical axis of the sighting optical path, and the bottom surface of the half-pentagon prism and the roof prism is at an angle of 90° to the optical axis of the sighting optical path.
  • the front surface of the reflective plane mirror is plated with a reflective film
  • the structure of the reflective film is alternately plated with materials ZnS-MgF 2 and ZrO 2 -SiO 2
  • the material having relatively high reflectivity is ZnS-MgF 2 code of an optical thickness H
  • the plating film is a multilayer rule (H L) n H, n is the number of layers, 3 ⁇ n ⁇ 8
  • the two films are alternately plated, and the thicknesses of H and L are both ⁇ /4, ⁇ is the wavelength of the emitted laser light
  • the front surface of the beam splitting mirror is plated with a beam splitting film
  • the structure of the beam splitting film is ZnS-MgF 2 and ZrO 2 - SiO 2 two films, the material having a relatively high reflectivity ZnS-MgF 2 has an optical thickness code of H, and the material having a relatively
  • the bottom surface of the half-pentagon prism has a glued surface on the bottom surface of the roof prism, and the glue surface is coated with a visible light transmission and a laser reflection film.
  • the visible light is reflected and the laser transmits. Spectroscopic light and visible light.
  • An optical device of a high-definition compact laser range finder comprising a control circuit, an observation aiming light path, a laser emitting light path, a laser receiving light path, and an OLED display projection light path, wherein the device has parallel left and right binocular laser measurements From the instrument light road, among them,
  • Observing the aiming light path components include:
  • Right aiming light path including imaging objective lens, beam splitting mirror, focusing lens, compensation plane mirror, half pentaprism, roof prism, eyepiece cemented lens and eyepiece single lens;
  • the left aiming light path includes an imaging objective lens, a beam splitting plane lens, a focusing lens, a compensation plane mirror, a half pentaprism, a roof prism, an eyepiece cemented lens, and an eyepiece single lens;
  • the laser emitting optical path constituent element comprises a semiconductor laser, a focusing lens, a reflecting plane mirror, a beam splitting plane mirror and an imaging objective lens;
  • a laser receiving optical path forming component including an imaging objective lens, a beam splitting plane mirror, a reflecting plane mirror, a focusing lens, and an avalanche diode;
  • OLED display projection light path constituent elements including self-luminous OLED display, projection optical path imaging lens, compensation plane mirror, half-pentagon prism and roof prism.
  • OLED display projection light path system can be self-illuminated display, applicable all day;
  • binocular laser range finder makes the application more comfortable.
  • Figure 1 is a schematic view showing the arrangement of an embodiment of the present invention
  • Figure 2 is a schematic view showing the arrangement of another embodiment
  • Figure 3 is a schematic view showing the arrangement of still another embodiment
  • FIG. 4 is a schematic diagram of optical design of a binocular laser range finder.
  • an imaging objective lens 11 a beam splitting mirror 12; a compensating plane mirror 13; a roof prism 14; a full transmissive display 15; an eyepiece cemented lens 16; an eyepiece single lens 17; a half pentaprism 18; a reflecting plane mirror 19; a focusing lens 20; 21; focusing objective lens 22; avalanche diode 23; projection optical path imaging lens 24; self-luminous OLED display 25; focus lens 29.
  • an optical device of a high-definition compact laser range finder includes a control circuit for observing an aiming optical path, a laser emitting optical path, a laser receiving optical path, and an OLED display projection optical path;
  • the observation aiming optical path includes an imaging objective lens 11, a beam splitting plane mirror 12, a compensating plane mirror 13, a half pentaprism 18, a roof prism 14, a full transmissive display 15, an eyepiece cemented lens 16, and an eyepiece single lens 17;
  • the compensation plane mirror By setting the compensation plane mirror, it is possible to solve the uneven aberration generated by a single beam splitting mirror. Sexuality and asymmetry; at the same time, the cooperation of the two plane mirrors does not cause the optical path of the objective lens and the eyepiece to translate;
  • the semi-pentagon prism 18 is glued to the roof prism 14 and has only one glued surface. Compared with the patent application of the aforementioned application No. 201210434066.2, the application of the Erhan prism has less glued surface, that is, the processing and assembly debugging time can be saved a lot.
  • the laser light emitting path constituting element includes a semiconductor laser 21, a focus lens 20, a reflection plane mirror 19, a beam splitting mirror 12, and an imaging objective lens 11, and each element is sequentially disposed to constitute a laser light emitting path.
  • the laser receiving optical path constituent element includes an imaging objective lens 11, a beam splitting plane mirror 12, a reflecting plane mirror 19, a focusing lens 20, and an avalanche diode 23, and the elements are sequentially disposed to constitute a laser receiving optical path.
  • the OLED display projection light path is a dual display optical path, and the constituent elements thereof include a self-luminous OLED display 25, a projection optical path imaging lens 24, a compensation plane mirror 13, a half-pentagon prism 18, a roof prism 14 and a full-transmissive display 15, and the components are sequentially arranged. Forms a dual display light path.
  • the object image can be clearly displayed on the full-transparent display under the condition that the external light intensity is insufficient, so that the red and black display can be switched, and the device can be applied all the time;
  • the display is located at the focal plane; the illuminating optical axis of the self-illuminating OLED display is set at an angle of 45° to the optical axis of the viewing optical path.
  • the beam splitting mirror 12 and the compensating plane mirror 13 are a pair of components which are identical in structure and symmetrically arranged; the optical axis of the incident light passing through the beam splitting mirror 12 is deflected away from the compensated plane mirror 13 and returned to the original optical axis.
  • the transmissive display 15 multiplexes the structural sighting optical path and the laser receiving optical path with the same optical axis.
  • the application common optical system includes a common objective lens group and a dichroic prism which are sequentially disposed from the object side to the image side along the optical path, the system structure realizes high definition compactness.
  • the dichroic prism is used to realize the splitting of the laser and the visible light.
  • the laser ranging system includes a laser converging lens and a detector arranged in sequence along the optical path of the laser.
  • the visible light aiming system includes a visible light mirror group and an eyepiece mirror set sequentially along the optical path of the visible light.
  • the OLED displays a self-luminous display of the projected light path.
  • the plane of the beam splitting mirror 12 is at an angle of 67.5 degrees with respect to the optical axis of the aiming beam path.
  • the normal direction of the beam splitting mirror 12 is at an angle of 22.5 degrees with respect to the optical axis of the sighting light path.
  • the normal of the compensating plane mirror 13 is at an angle of -22.5° with respect to the optical axis of the aiming optical path.
  • the reflecting plane mirror 19 is disposed in parallel with the beam splitting mirror 12, or the reflecting plane mirror 19 is also at an angle of 67.5 degrees with respect to the optical axis of the sighting beam path.
  • the glued surface of the half-pentagon prism 18 and the roof prism 14 is at an angle of 42 with respect to the optical axis of the sighting optical path, and the bottom surface of the half-pentagon prism 18 and the bottom surface of the roof prism 14 are at an angle of 90 with respect to the optical axis of the sighting optical path.
  • the front surface of the reflective plane mirror 19 is plated with a reflective film.
  • the thicknesses of H and L are both ⁇ /4, ⁇ is the wavelength of the emitted laser light; the reflective plane mirror of the structure 19 has a very high reflectivity, both calculated and measured to demonstrate a reflectivity of 99.7%.
  • the plating of the reflective film in front of the reflective mirror 19 facilitates the avoidance of double reflections to form two images.
  • the front surface of the beam splitting mirror 12 is plated with a beam splitting film.
  • the structure of the beam splitting film is ZnS-MgF 2 and ZrO 2 -SiO 2 .
  • the optical thickness of the material ZnS-MgF 2 having a relatively high reflectance is H
  • having a relatively low reflectance optical thickness of a material ZrO 2 -SiO 2 code is L
  • the film-based unit is (H / 2) L (H / 2), repeated units based film obtained long pass band
  • H/2 means that the optical thickness is 1/8 wavelength. After coating, it is advantageous to achieve higher transmittance of higher wavelength visible light while reflecting shorter wavelength laser light.
  • the bottom surface of the semi-pentagon prism 18 and the bottom surface of the roof prism 14 have a bonding surface, and the bonding surface is coated with a visible light transmitting and laser reflecting film.
  • the bonding surface is coated with a visible light transmitting and laser reflecting film.
  • the avalanche diode 23 photoelectrically converts the laser beam incident on the photosensitive surface of the element to generate an echo signal required for laser ranging, and then processes the echo signal to obtain distance information.
  • Embodiment 2 A laser emitting light routing semiconductor laser 21 is formed with a focusing objective lens 22, and a corresponding laser receiving light path focusing objective lens 22 is formed with an avalanche diode 23, and the semiconductor laser 21 and the avalanche diode 23 are the same component, and the rest of the structure is the same Example 1, see Figure 2.
  • Embodiment 3 Laser receiving light routing
  • the imaging objective lens 11, the beam splitting mirror 12, the reflecting plane mirror 19, the focusing lens 20, and the avalanche diode 23 are sequentially disposed.
  • the remaining structure is the same as in Embodiment 1, see Figure 3.
  • the element semiconductor laser 21 in FIG. 3 and the avalanche diode 23 are the same element.
  • Embodiment 4 The laser light emitting path constituting element includes a semiconductor laser 21 and a focus lens 20, and an optical axis of the laser light emitting path is perpendicular to the observation aiming light path; and the corresponding laser receiving light path forming element includes a focusing objective lens 22 and an avalanche diode 23.
  • the remaining structure is the same as in Embodiment 1, see Figure 3.
  • Embodiment 5 An optical device of a high-definition compact laser range finder, comprising a control circuit for observing an aiming optical path, a laser emitting optical path, a laser receiving optical path, and an OLED display projection optical path, wherein the device has left and right arranged in parallel Binocular laser range finder optical path, wherein
  • Observing the aiming light path components include:
  • Imaging objective lens 11 beam splitting mirror 12, focusing lens 29, compensating plane mirror 13, half pentaprism 18, roof prism 14, eyepiece cemented lens 16 and eyepiece single lens 17;
  • the left aiming optical path includes an imaging objective lens 11, a beam splitting plane mirror 12, a focusing lens 29, a compensating plane mirror 13, a half pentaprism 18, a roof prism 14, an eyepiece cementing lens 16, and an eyepiece single lens 17;
  • the laser emitting light path constituting element comprises a semiconductor laser 21, a focusing lens 20, a reflecting plane mirror 19, a beam splitting mirror 12 and an imaging objective lens 11;
  • the laser receiving optical path constituent elements include an imaging objective lens 11, a beam splitting mirror 12, a reflecting plane mirror 19, a focusing lens 20 and an avalanche diode 23;
  • the OLED display projection light path constituent elements include a self-luminous OLED display 25, a projection optical path imaging lens 24, a compensation plane mirror 13, a half-pentagon prism 18, and a roof prism 14.
  • the optical device of the laser range finder of the invention has the advantages of compact structure, small volume, common optical axis, component sharing, low cost, time saving in assembly and debugging, and all-weather application. If a person skilled in the art can make a simple modification or substitution of the above-mentioned invention, such a change is not to be considered as a departure from the scope of the claims of the present invention, and all modifications apparent to those skilled in the art will be included in the present invention. Within the scope of the claims.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Lenses (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

La présente invention concerne un appareil optique pour un télémètre laser compact à haute définition, comprenant un circuit de commande, un trajet optique de collimation d'observation, un trajet optique de transmission laser, un trajet optique de réception laser et un trajet optique de projection d'affichage OLED. Les éléments constitutifs du trajet optique de collimation d'observation comprennent une lentille d'objectif d'imagerie (11), un miroir plan de division de lumière (12), un miroir plan de compensation (13), un demi-pentaprisme (18), un prisme en toit (14), un affichage totalement transmissif (15), une lentille cémentée d'oculaire (16) et une lentille unique d'oculaire (17), et les différents éléments sont successivement agencés pour constituer l'appareil selon l'invention. L'appareil de l'invention présente une disposition structurale compacte et un faible volume ; un axe optique commun peut être partagé par les éléments afin de réduire les éléments et diminuer le coût de fabrication ; et un système de trajet optique de projection d'affichage OLED est agencé, qui peut émettre indépendamment de la lumière et un affichage pour utilisation par tous les temps. L'appareil de l'invention présente un faible temps d'assemblage et de mise au point et est d'un coût faible, possède une structure compacte, est particulièrement adapté pour une utilisation domestique générale et être transporté.
PCT/CN2016/090794 2016-07-21 2016-07-21 Appareil optique pour télémètre laser compact à haute définition Ceased WO2018014276A1 (fr)

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Cited By (11)

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CN108387212A (zh) * 2018-03-06 2018-08-10 常州市新瑞得仪器有限公司 一种电子水准仪及其工作方法
CN109387847A (zh) * 2018-09-21 2019-02-26 刘云坤 一种激光测距望远镜光学分束系统
CN110044323A (zh) * 2019-04-30 2019-07-23 中国科学院西安光学精密机械研究所 一种轻小型多功能脉冲激光测距光学系统
CN110199202A (zh) * 2018-04-18 2019-09-03 深圳市瑞尔幸电子有限公司 一种成像透镜前分离激光的共光路的测距瞄准器
CN110417469A (zh) * 2019-08-26 2019-11-05 常州镭斯尔通讯技术有限公司 通信观察终端及望远镜系统
CN111398940A (zh) * 2020-04-27 2020-07-10 江苏北方湖光光电有限公司 一种保护观测镜内雪崩管的综合测试装置
CN111609830A (zh) * 2020-05-18 2020-09-01 广州博冠光电科技股份有限公司 一种正像共轴光学系统及双筒激光测距望远镜
CN111736164A (zh) * 2020-07-30 2020-10-02 金华市蓝海光电技术有限公司 一种激光扫描测距仪
CN113204094A (zh) * 2021-05-11 2021-08-03 杭州智屹科技有限公司 一种光束分离系统-双半五棱镜方案
CN113253265A (zh) * 2020-12-16 2021-08-13 航天科工微电子系统研究院有限公司 基于tir棱镜转向共孔径发射的层析成像方法
CN114660091A (zh) * 2022-03-21 2022-06-24 哈尔滨工业大学 集束装置终端光学组件成像系统及方法

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108387212A (zh) * 2018-03-06 2018-08-10 常州市新瑞得仪器有限公司 一种电子水准仪及其工作方法
CN110199202B (zh) * 2018-04-18 2022-11-18 深圳市瑞尔幸电子有限公司 一种成像透镜前分离激光的共光路的测距瞄准器
CN110199202A (zh) * 2018-04-18 2019-09-03 深圳市瑞尔幸电子有限公司 一种成像透镜前分离激光的共光路的测距瞄准器
CN109387847A (zh) * 2018-09-21 2019-02-26 刘云坤 一种激光测距望远镜光学分束系统
CN109387847B (zh) * 2018-09-21 2023-08-04 刘云坤 一种激光测距望远镜光学分束系统
CN110044323A (zh) * 2019-04-30 2019-07-23 中国科学院西安光学精密机械研究所 一种轻小型多功能脉冲激光测距光学系统
CN110044323B (zh) * 2019-04-30 2024-04-05 中国科学院西安光学精密机械研究所 一种轻小型多功能脉冲激光测距光学系统
CN110417469A (zh) * 2019-08-26 2019-11-05 常州镭斯尔通讯技术有限公司 通信观察终端及望远镜系统
CN111398940A (zh) * 2020-04-27 2020-07-10 江苏北方湖光光电有限公司 一种保护观测镜内雪崩管的综合测试装置
CN111609830A (zh) * 2020-05-18 2020-09-01 广州博冠光电科技股份有限公司 一种正像共轴光学系统及双筒激光测距望远镜
CN111736164A (zh) * 2020-07-30 2020-10-02 金华市蓝海光电技术有限公司 一种激光扫描测距仪
CN113253265A (zh) * 2020-12-16 2021-08-13 航天科工微电子系统研究院有限公司 基于tir棱镜转向共孔径发射的层析成像方法
CN113253265B (zh) * 2020-12-16 2024-03-29 航天科工微电子系统研究院有限公司 基于tir棱镜转向共孔径发射的层析成像方法
CN113204094A (zh) * 2021-05-11 2021-08-03 杭州智屹科技有限公司 一种光束分离系统-双半五棱镜方案
CN114660091A (zh) * 2022-03-21 2022-06-24 哈尔滨工业大学 集束装置终端光学组件成像系统及方法

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