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WO2011006702A1 - Dispositif de projection pour source laser externe - Google Patents

Dispositif de projection pour source laser externe Download PDF

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Publication number
WO2011006702A1
WO2011006702A1 PCT/EP2010/057052 EP2010057052W WO2011006702A1 WO 2011006702 A1 WO2011006702 A1 WO 2011006702A1 EP 2010057052 W EP2010057052 W EP 2010057052W WO 2011006702 A1 WO2011006702 A1 WO 2011006702A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
projection device
projection
laser beam
pendulum
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.)
Ceased
Application number
PCT/EP2010/057052
Other languages
German (de)
English (en)
Inventor
Thomas Zimmermann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2011006702A1 publication Critical patent/WO2011006702A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means
    • G01C15/004—Reference lines, planes or sectors

Definitions

  • Projection devices with integrated laser source are known, for example, from WO 2008/024335 A2.
  • the light emitted from one or more laser sources is first collimated and then influenced by beam shaping elements such as a cylindrical lens such that when the shaped beam impinges on a surface, the desired projection pattern is formed.
  • beam shaping elements such as a cylindrical lens
  • the projection pattern is a line.
  • the optical unit for generating the output beam is usually suspended pendulum to be independent of an inclination of the device within the compensation range of the pendulum.
  • the known projection devices have an integrated laser source and therefore also require its own power supply. If different projection patterns are required, accordingly, several independent projection devices each with its own laser source and power supply must be kept ready. This increases the risk of default and the acquisition and maintenance costs.
  • a projection apparatus comprises a housing having an entrance opening and an exit opening.
  • the laser beam of an external laser source can enter the housing through the input opening, and at least part of the laser light that has entered the housing can exit the housing again through the output opening. Entrance and / or exit opening can also be equipped with transparent to the laser beam windows.
  • a projection device further comprises a photoconductive element which is arranged between the inlet opening and the outlet opening of the housing such that at least part of the laser beam entering the housing through the inlet opening enters the inlet end is coupled to the photoconductive member and at least a part of the decoupled from the output side end of the photoconductive member laser beam exits through the output port of the housing.
  • the beam-shaping element preferably has a collimating lens.
  • the projection device further comprises a pendulum suspended in the housing holder.
  • the output-side end of the light-conducting element is attached to the pendulum-suspended holder so that the exiting through the outlet opening of the housing laser beam horizontally, that is perpendicular to the direction of gravity. If a beam-shaping element is used, this may also be attached to the holder.
  • the projection device further comprises a braking device for braking the movements of the pendulum-suspended holder.
  • the braking device may be, for example, an eddy current brake at the lower end of the holder.
  • the holder can also be provided with a tilt sensor, which detects the inclination of the holder and compensates for this by a motorized adjustment in one or two axes.
  • the projection device further comprises an out-of-level warning device for notifying the user when the pendulum-mounted bracket reaches the end of the shuttle area.
  • the warning device can provide a visual and / or audible notification of the user.
  • the projection device further comprises a fastening device for fastening the laser source to the projection device.
  • the fastening device is adjustable in order to adapt to different laser sources.
  • At least the beam-shaping element is arranged in a replaceable housing part.
  • a projection device has the advantage over prior art devices of using an external laser source that is often already present in the relevant applications (such as in construction and construction).
  • an opto-electronic rangefinder emitting a collimated laser beam can be used as a laser source for a projection device according to the invention.
  • Such a rangefinder is known for example from WO 2007/067771 A2.
  • the entry of the externally generated laser beam into the housing of the projection device and the exit of the beam from the housing are at least partially decoupled. Since the device according to the invention requires no electrical energy and works purely passive, no additional power supply or susceptible electronics is required.
  • a desired intensity distribution can be given to the laser beam coupled out of the light-conducting element in order to produce the desired projection pattern.
  • a line can be generated as a projection pattern by means of a cylindrical lens.
  • DOE diffractive optical element
  • different projection devices according to the invention with different beam-shaping elements can therefore be used with an external laser source having its own power supply.
  • the projection devices each come without their own power supply.
  • the projection pattern becomes independent of inclination of the housing at least within the compensation range of the pendulum.
  • the Projection device according to the invention then does not have to be built exactly horizontal.
  • the support may be suspended in one or two axes to compensate for inclinations of the housing in the longitudinal direction of the projection device and / or in the transverse direction of the projection device.
  • adjusting devices can be provided on the projection device in order to set it up approximately horizontally. As a result, it can be prevented that the inclination of the housing is too large to be compensated by the pendulum, or the projection device can also be placed horizontally in a direction in which no compensation is provided by a pendulum. A dragonfly can allow the control of the horizontal positioning of the housing of the projection device.
  • a braking device for slowing down the movements of the pendulum suspended bracket reduces the time that a user must wait for a movement of the projection device until the pendulum movement of the bracket has subsided and the projection pattern is aligned correctly.
  • a warning device for notifying the user ensures that the user is informed when the inclination of the housing becomes so great that it can no longer be compensated by the pendulum-suspended holder.
  • the user can be prevented from erroneously assuming an accurate alignment of the projection pattern, although it is no longer guaranteed.
  • An attachment device for fastening the laser source to the projection device ensures that, when the projection device moves, the laser source is always moved accordingly. Thus, the user does not have to move both parts separately. In addition, a once set good coupling of the laser beam is maintained in the photoconductive member when the projection device is moved.
  • the fastening device is adjustable, it can be adapted to different laser sources and is therefore flexible in use. Since it is not certain that all
  • Laser sources have the same dimensions and the laser beam in the same place send out, allows a relative to the housing movable input port and a movable with the input port entrance end of the photoconductive element, the coupling of laser beams from different laser sources.
  • a collecting lens is provided at the coupling point.
  • the beam-shaping element is arranged in a replaceable housing part, a change of the projection pattern can be achieved by replacing this housing part with a corresponding housing part with another beam-forming element, without having to change the installation of the projection device.
  • Fig. 1 is a perspective view of a preferred embodiment of the projection device according to the invention and an external laser source;
  • Fig. 2 is a perspective view of the embodiment according to Fig.l, wherein the
  • Laser source was inserted into the fastening device of the projection device.
  • Fig. 3 is a partially sectioned side view of the embodiment according to
  • Fig. 1 shows a preferred embodiment of the projection device (1) according to the invention and about an external laser source (2) usable with the projection device (1).
  • the laser source (2) is a known opto-electronic Rangefinder, which can emit a laser beam, as it is known as BOSCH® DLE 50, for example.
  • the projection device (1) has a housing (4), which is connected to a fastening device consisting of a bearing surface (5) and a holder (6).
  • the rangefinder can be connected to the projection device by being inserted into the fastening device, as shown in FIG.
  • Fig. 3 is a partially sectioned side view of the preferred embodiment with a laser source (2) used in the fastening device shown in FIG. 2.
  • the collimated laser beam (3) emitted by the laser source (2) strikes a coupling lens (7) which is arranged in the inlet opening (8) of the housing (4) and closes it.
  • the coupling lens (7) focuses the laser beam (3) and couples it into the input-side end (9) of a glass fiber (10).
  • the collimated laser beam (3) impinges on a cylindrical lens (13), which influences the laser beam (3) so that it is divergent in the horizontal plane but remains perpendicular to it but collimated.
  • the thus shaped laser beam (3) then leaves the housing (4) of the projection device (1) through the exit opening (14), which is covered by a transparent window (15).
  • the output end (11) of the glass fiber (10), and the coupling lens (12) and the cylindrical lens (13) are at one inside the housing (4) arranged pendulum (16) attached.
  • the pendulum (16) is connected via a suspension movable in an axis (17) with the housing (4).
  • a weight (18) at the lower end of the pendulum (16) generates a sufficient torque against the restoring moments caused by the glass fiber (10).
  • a permanent magnet (19) is mounted on the housing (4) which induces eddy currents in the weight (18) during a movement of the pendulum (16) and thus causes a deceleration of the pendulum motion (eddy current brake).
  • an adjusting screw (20) is provided on the housing (4).
  • One on the housing (4) attached dragonfly (21) serves to control the orientation of the projection device (1).

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Lens Barrels (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un dispositif de projection pour la création de lignes ou de motifs analogues au moyen d'un laser, ce dispositif de projection ne contenant pas de source laser propre mais utilisant une source laser externe. Un élément conducteur optique placé à l'intérieur du dispositif de projection permet le découplage du faisceau laser entrant dans le dispositif de projection et du faisceau modifié sortant du dispositif de projection.
PCT/EP2010/057052 2009-07-14 2010-05-21 Dispositif de projection pour source laser externe Ceased WO2011006702A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910027664 DE102009027664A1 (de) 2009-07-14 2009-07-14 Projektionsvorrichtung für externe Laserquelle
DE102009027664.5 2009-07-14

Publications (1)

Publication Number Publication Date
WO2011006702A1 true WO2011006702A1 (fr) 2011-01-20

Family

ID=42562818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/057052 Ceased WO2011006702A1 (fr) 2009-07-14 2010-05-21 Dispositif de projection pour source laser externe

Country Status (2)

Country Link
DE (1) DE102009027664A1 (fr)
WO (1) WO2011006702A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6048105A (en) * 1995-08-17 2000-04-11 Kabushiki Kaisha Topcon Laser system for surveying
WO2000065754A1 (fr) * 1999-04-26 2000-11-02 Ciena Corporation Module de compensation de dispersion
DE102005011956A1 (de) * 2005-03-14 2006-09-21 Schott Ag Faseroptische Anordnung für Anzeigeeinrichtungen, insbesondere mit analogen oder digitalen Displays, sowie mit dieser versehene Einrichtungen
WO2007067771A2 (fr) * 2005-12-08 2007-06-14 Robotoolz, Limited Dispositif de mesure de distance optique portable
WO2008024335A2 (fr) * 2006-08-22 2008-02-28 Robert Bosch Company Limited Unité laser de référence portative et accessoire de fixation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6048105A (en) * 1995-08-17 2000-04-11 Kabushiki Kaisha Topcon Laser system for surveying
WO2000065754A1 (fr) * 1999-04-26 2000-11-02 Ciena Corporation Module de compensation de dispersion
DE102005011956A1 (de) * 2005-03-14 2006-09-21 Schott Ag Faseroptische Anordnung für Anzeigeeinrichtungen, insbesondere mit analogen oder digitalen Displays, sowie mit dieser versehene Einrichtungen
WO2007067771A2 (fr) * 2005-12-08 2007-06-14 Robotoolz, Limited Dispositif de mesure de distance optique portable
WO2008024335A2 (fr) * 2006-08-22 2008-02-28 Robert Bosch Company Limited Unité laser de référence portative et accessoire de fixation

Also Published As

Publication number Publication date
DE102009027664A1 (de) 2011-01-20

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