DE10156911A1 - Alignment of an optical instrument such as a geodesic instrument, theodolite, light barrier or light sampler, by use of an alignment aid that is suitable for visualizing a far away target and for use with non-visible light - Google Patents

Alignment of an optical instrument such as a geodesic instrument, theodolite, light barrier or light sampler, by use of an alignment aid that is suitable for visualizing a far away target and for use with non-visible light

Info

Publication number
DE10156911A1
DE10156911A1 DE2001156911 DE10156911A DE10156911A1 DE 10156911 A1 DE10156911 A1 DE 10156911A1 DE 2001156911 DE2001156911 DE 2001156911 DE 10156911 A DE10156911 A DE 10156911A DE 10156911 A1 DE10156911 A1 DE 10156911A1
Authority
DE
Germany
Prior art keywords
splitter
target
radiation
reflection
optics
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.)
Granted
Application number
DE2001156911
Other languages
German (de)
Other versions
DE10156911B4 (en
Inventor
Thomas Meinert
Theodor Wanner
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.)
SensoPart Industriesensorik GmbH
Original Assignee
SensoPart Industriesensorik 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 SensoPart Industriesensorik GmbH filed Critical SensoPart Industriesensorik GmbH
Priority to DE2001156911 priority Critical patent/DE10156911B4/en
Publication of DE10156911A1 publication Critical patent/DE10156911A1/en
Application granted granted Critical
Publication of DE10156911B4 publication Critical patent/DE10156911B4/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14Viewfinders

Abstract

The invention relates to a device for determining or adjusting a point of incidence of an optical beam on a target field, comprising a radiation source (12) emitting the optical beam and a device (22) for observing the target field. In order to be able to observe radiation hitting the target field even at great distances or unfavorable visibility conditions, it is proposed that the device (22) have a beam splitter (24) arranged in the beam path, a reflection surface (30) arranged on one side of the beam splitter (24), a first optics arranged between this and the beam splitter (24), in the focal plane of which the reflection surface is arranged, and on the opposite side of the beam splitter both radiation passing through the first optics and radiation originating from the target field and detecting radiation reflected by the beam splitter (38 , 40).

Description

  • The invention relates to a device for determining or adjusting a Impact point of an optical beam on a target field comprising the optical Beam emitting radiation source and a device for observing the target field as well Alignment.
  • Are geodetic devices, light barriers or light sensors - generally as sensors designated - with a large distance between radiation source and target field or with for human eye uses invisible radiation like IR radiation, so is one The beam or spot hitting the target field is no longer visible. So are optical aids required to align the radiation source and thus the To enable device or the sensor on the target field.
  • In order to adjust a theodolite, an arrangement of a Laserpen in a rifle scope of the theodolite with a lens for visual aiming proposed a laser diode of a lens or lens group of smaller diameter assigned. The lens for visual aiming, which consists of several lenses, is included a centrally arranged lens or lens group of smaller diameter to one Combined objective of different aperture and the laser diode is combined behind this Arranged lens of a different aperture and forms a complete laser pen with this. there is the energy emitted by the laser diode through the combined lens different aperture mapped to infinity.
  • So-called laser pointers are also known, which are attached to the housing of a sensor be, with an alignment to the transmit-receive axis of the sensor. adversely a corresponding arrangement is that the separately adjustable to the arrangement Laser pointer as alignment aid must be aligned exactly with the optical axes of the sensor got to. Regardless of this, the is even with large distances between the sensor and the target field The intensity of the laser beam of the alignment aid is often no longer sufficient to be from one human eye to be grasped without aids.
  • DE 88 15 531 U1 describes a sensor with a target device which is used as a rear sight and Grain or single telescope is formed. A corresponding alignment aid is individual in to integrate a sensor and thus represents a costly solution.
  • The present invention is based on the problem of a device at the outset of the above-mentioned type in such a way that with structurally simple measures one targets a target field incident optical beam can also be detected when there are large distances between Radiation source, i.e. transmitter and target field exist. Furthermore, there should be the possibility a beam that is invisible to the human eye and strikes the target field make visible. An alignment aid for adjusting an optical radiator is also said to a target field will be provided.
  • According to the invention, the problem is essentially solved in that the device a beam splitter arranged in the beam path, one on one side of the beam splitter arranged reflection surface, a first arranged between this and the beam splitter Optics in whose focal plane the reflection surface is arranged and on the opposite Side of the beam splitter arranged both penetrating the first optics and radiation second coming from the target field and detecting radiation reflected by the beam splitter Optics includes.
  • According to the invention, the principle of autocollimation is used, whereby by deflecting Radiation emitted by the device is an apparent target point in the target field Device is generated, which is observed by means of the second optics, which is in the simplest case can be the human eye itself.
  • The beam splitter, the first and second optics and the reflection surface can be one be a separate unit that a sensor such as geodetic device, light barrier, light sensor etc. can be assigned to target a target field.
  • In particular, however, the second optic comprises an objective, via which the beam splitter coming radiation is focusable. If an eyepiece is arranged after the lens, fall Focal plane of the objective with focal plane of the eyepiece optics arranged downstream of the objective together.
  • Objective and eyepiece represent an imaging optic to the apparent point of impact of the Detect radiation on the target field and thus like the device like a sensor Photoelectric sensor or light scanner or a geodetic device, just a few applications to call, to adjust.
  • The observation device can extend the field of view for the observer restrict that to the radiation emitted by the radiation source forming a transmission spot there is a reasonable relationship. Furthermore, by a corresponding Focal length ratio of objective to eyepiece optics between the beam splitter and the observer is arranged, an enlargement in the representation of the target field for a human Eye are made possible (telescope). It is advisable to use commercially available monoculars be used.
  • In a further development of the invention it is provided that in the focal plane of the objective Image guide or the entrance surfaces of these are arranged so as to be by autocollimation shown beam or broadcast spot apparently hitting a target field removed from the To be able to observe the device. This is a simple way of transferring images possible. Mapping in the focal plane to a camera module such as e.g. B. CCD or CMOS cam, so that image transmission is also possible. That about the The light guide or the image transferred from the camera module can then be viewed on a monitor LCD matrix screen can be displayed.
  • In particular and according to a further development of the invention that is to be emphasized, it is provided that the reflection surface is designed as a radiation converter. This is an advantage if the radiation emitted by the radiation source is not visible to the optical eye, that is z. B. infrared radiation. A corresponding radiation converter can be a phosphor Be umbrella, by means of which. B. invisible IR radiation is converted into visible light, so that with the observation or adjustment device to be described as passive Adjustment of the device itself is possible, even if that in the device by the Radiation source emits radiation that is not visible to the human eye.
  • The reflection surface can also be adjustable in the direction of the optical axis of the first optics. to coordinate the focal positions of the image of the target field (image plane) and that of the To enable reflection spots originating in the observation plane.
  • Furthermore, a development of the invention to be emphasized provides that the Beam splitter is designed as a physical part, so that a desired intensity distribution between those let through by the reflecting surface and coming from the target field and from radiation reflected from the reflecting surface takes place. Consequently, a vote of intensities detected in the second optics.
  • An independent solution proposal refers to an alignment aid for a target field beam to be adjusted, in particular a beam of z. B. one Light-emitting diode or laser diode and is characterized in that the alignment aid in one Housing arranged one of the beamsplitter penetrated by the beam to be adjusted one side of the beam splitter arranged reflection surface, one between this and the First optics arranged in the beam splitter, in the focal plane of which the reflection surface is arranged is, and arranged on the opposite side of the beam splitter both the first optics penetrating radiation as well as from the target field and from the beam splitter includes reflected radiation detecting second optics.
  • Further details, advantages and features of the invention result not only from the Claims, the features to be extracted from these - individually and / or in combination -, but also from the following description of one of the drawings preferred embodiment.
  • In order to align radiation emitted by a device to a target field, it must be directed to the Beam or spot striking the target field can be optically detected. To at large distances between the device and the target field or in the emission of for the human eye To be able to observe invisible radiation at the point of impact in the target field is according to the invention an alignment aid is provided, which works on the principle of autocollimation and in Connection with a light barrier is to be explained, without this The teaching of the invention is restricted. Rather, it is everywhere there applicable where a point of incidence of a beam emitted by a transmitter on a target field is observed, in particular to adjust the radiation source and thus the device itself can.
  • The alignment aid explained below can be integrated in the device or isolated z. B. be handled as an accessory or attachment.
  • In a housing 10 there is a transmitter, such as an infrared transmitter 12 , which is arranged in the focal plane of an optical system 14 , so that the radiation emitted by the transmitter 12 is aligned in parallel. The radiation 16 passes through openings 18 , 20 of the housing 10 which are aligned with one another in order to strike a spot (spot) on a target field (not shown). In order to observe the point of impact and thus to be able to adjust the housing 10 and thus the light barrier, a device 22 , referred to as an alignment aid, is provided which comprises a beam splitter 24 which, in the exemplary embodiment, is inclined at an angle of 45 ° to the parallel beams 16 between the beams openings 18 , 20 which are aligned with one another are arranged in a housing section 26 . Other angles are also possible.
  • The housing section 26 delimits a channel-like space 28 , the bottom surface of which is designed as a reflection surface 30 . The reflection surface 30 is located in the focal plane of an optic 32 designed as a collimator lens, so that radiation 34 originating from the splitter mirror 24 is focused on the reflection surface 30 . The light reflected by the reflection surface 30 of radiation is parallelized by the optical system 32 to be detected on the opposite with respect to the reflection surface 30 side of the beam splitter 24 of an observation device 36th As in the exemplary embodiment, the observation device 36 can consist of an objective 38 and an eyepiece 40 .
  • An observer looking through the eyepiece 40 thus sees the radiation focused in the focal plane 42 of the objective 38 and reflected by the reflection surface 30 as a point within the overall field of view. This point corresponds to the point of incidence of the radiation on the target field, which is detected simultaneously by the observation device 16 . Thus, the housing 10 and thus the corresponding device - in the exemplary embodiment of the light barrier - can be adjusted to the target field without any problems.
  • In the simplest case, the observation device 36 can also be formed without imaging optics, that is to say without an objective 38 and an eyepiece 40 . In this case, the observer sees the target field and the target point generated by the collimator lens 32 simultaneously via the divider mirror 24 .
  • By means of the observation device 36 , the field of vision for the observer can be restricted to such an extent that there is a meaningful relationship to the transmission spot of the radiation source 12 . Furthermore, a predetermined focal length ratio of objective 38 and eyepiece 40 enables an enlargement in the representation of the target field (telescope). Commercial monoculars can be used for this.
  • If light that is not visible to the human eye is emitted by the light source 12 , the apparent point of impact can also be detected optically by designing the reflection surface 30 as a radiation converter. For example, the reflection surface can be designed as a phosphorescent screen, so that IR radiation that is not visible to the human eye is converted into visible light. The alignment aid 32 can thus also be used for adjusting sensors whose radiation is not visible to the human eye.
  • To ensure independent observation when e.g. B. a sensor is arranged in an area inaccessible to an observer, an image transmission can take place. Here, for. B. in the focal plane of the lens 38, the entrance surface of image guides to a transmission z. B. to a monitor such. B. LCD matrix screen. However, transmission via camera modules such as CCD or CMOS cam arranged in the focal plane 42 also enables image recording and transmission.
  • The first and second optics, the beam splitter and the reflective surface can mentioned be formed as a separate unit to be aligned to a beam that to be adjusted to a target field.
  • Furthermore, the beam splitter can be a physical splitter, so that selectively the intensities of the adjustment spot and the light originating from the reflection surface of the target field can be coordinated.
  • Also, the reflecting surface 30 can in the direction of optical axis 31 of the first optical system 32 may be adjustable to a vote of Fokallagen from the image of the target field (image plane) and that coming from the reflection surface 31 Justierspots in the observation plane to allow.

Claims (12)

1. Device for determining or adjusting an impingement point of an optical beam on a target field comprising a radiation source emitting the optical beam and a device for observing the target field, characterized in that the device ( 22 ) has a beam splitter ( 24 ) arranged in the beam path , a on one side of the beam splitter ( 24 ) arranged reflection surface ( 30 ), a first optics arranged between the latter and the beam splitter ( 24 ), in the focal plane of which the reflection surface is arranged, and on the opposite side of the beam splitter both radiation passing through the first optics and also comprises second optics ( 38 , 40 ) originating from the target field and detecting radiation reflected by the beam splitter.
2. Device according to claim 1, characterized, that the second optic is a human eye.
3. Device according to claim 1 or 2, characterized in that the second optical system comprises a lens ( 38 ) whose focal plane coincides with the focal plane of an eyepiece ( 40 ).
4. The device according to at least one of the preceding claims, characterized in that in the focal plane ( 42 ) of the lens ( 38 ) entry surface of at least one image guide is arranged.
5. The device according to at least one of the preceding claims, characterized in that a camera module such as an image sensor, in particular a CCD or CMOS cam, is arranged in the focal plane ( 42 ) of the objective ( 38 ).
6. The device according to at least one of the preceding claims, characterized, that image received by the image guide or the camera module or image sensor can be transferred to a monitor such as an LCD matrix screen.
7. The device according to at least one of the preceding claims, characterized in that the reflection surface ( 30 ) is designed as a radiation converter.
8. The device according to at least one of the preceding claims, characterized in that the reflection surface ( 30 ) is designed as a phosphorizing screen.
9. The device according to at least one of the preceding claims, characterized in that the radiation splitter ( 24 ) to the axis of the radiation incident on the target field describes an angle deviating from 45 °.
10. The device according to at least one of the preceding claims, characterized in that the beam splitter ( 24 ) is a physical splitter.
11. The device according to at least one of the preceding claims, characterized in that the reflection surface ( 30 ) in the direction of the optical axis ( 31 ) of the first optics ( 32 ) is adjustable.
12. Alignment aid for a beam to be adjusted on a target field, in particular a beam of z. B. a light-emitting diode or laser diode, characterized in that the alignment aid has a beam splitter ( 24 ) arranged in a housing and penetrated by the beam to be adjusted, a reflection surface ( 30 ) arranged on one side of the beam splitter ( 24 ), one between the beam splitter and the beam splitter ( 24 ) arranged first optics, in the focal plane of which the reflection surface is arranged, and arranged on the opposite side of the beam splitter includes both radiation penetrating the first optics and second optics ( 38 , 40 ) originating from the target field and detecting radiation reflected by the beam splitter.
DE2001156911 2001-11-21 2001-11-21 Device for determining or adjusting a point of impact and alignment aid Expired - Fee Related DE10156911B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001156911 DE10156911B4 (en) 2001-11-21 2001-11-21 Device for determining or adjusting a point of impact and alignment aid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001156911 DE10156911B4 (en) 2001-11-21 2001-11-21 Device for determining or adjusting a point of impact and alignment aid

Publications (2)

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DE10156911A1 true DE10156911A1 (en) 2003-05-28
DE10156911B4 DE10156911B4 (en) 2004-07-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025751A1 (en) * 2004-05-26 2005-12-22 Sick Ag Adjusting device, in particular for light barriers or light grids and method for adjustment
DE102006053359A1 (en) * 2006-11-10 2008-05-15 Sick Ag Optoelectronic sensor arrangement and method for adjusting an optoelectronic sensor arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936966A1 (en) * 1989-02-02 1990-08-09 Jenoptik Jena Gmbh Automatic target acquisition, esp. using theodolite - using aperture controlled by opto-electronic sensor signal for simplified measurement without focussing
DE3926314C1 (en) * 1989-08-09 1990-12-13 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Arrangement for adjusting sensor reference mirror - includes theodolite having auto-collimation unit on vertical holding plate and liq. holding plate from auto-collimator to reflect light
DE4406914A1 (en) * 1994-03-03 1995-09-07 Gottlieb Nestle Gmbh & Co Kg Laser theodolite
DE29600712U1 (en) * 1996-01-17 1996-06-27 Rothenbuehler Walter Laser addition to an existing optical leveling device
DE19941638C1 (en) * 1999-08-27 2000-12-14 Zeiss Carl Jena Gmbh Geodatic theodolite or tachometer has laser device used for determining height above ground of common intersection point of telescope optical axis, pivot axis and rotation axis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936966A1 (en) * 1989-02-02 1990-08-09 Jenoptik Jena Gmbh Automatic target acquisition, esp. using theodolite - using aperture controlled by opto-electronic sensor signal for simplified measurement without focussing
DE3926314C1 (en) * 1989-08-09 1990-12-13 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Arrangement for adjusting sensor reference mirror - includes theodolite having auto-collimation unit on vertical holding plate and liq. holding plate from auto-collimator to reflect light
DE4406914A1 (en) * 1994-03-03 1995-09-07 Gottlieb Nestle Gmbh & Co Kg Laser theodolite
DE29600712U1 (en) * 1996-01-17 1996-06-27 Rothenbuehler Walter Laser addition to an existing optical leveling device
DE19941638C1 (en) * 1999-08-27 2000-12-14 Zeiss Carl Jena Gmbh Geodatic theodolite or tachometer has laser device used for determining height above ground of common intersection point of telescope optical axis, pivot axis and rotation axis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025751A1 (en) * 2004-05-26 2005-12-22 Sick Ag Adjusting device, in particular for light barriers or light grids and method for adjustment
DE102006053359A1 (en) * 2006-11-10 2008-05-15 Sick Ag Optoelectronic sensor arrangement and method for adjusting an optoelectronic sensor arrangement
DE102006053359B4 (en) * 2006-11-10 2011-06-01 Sick Ag Optoelectronic sensor arrangement and method for adjusting an optoelectronic sensor arrangement
DE102006053359C5 (en) * 2006-11-10 2015-12-10 Sick Ag Optoelectronic sensor arrangement and method for adjusting an optoelectronic sensor arrangement

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Publication number Publication date
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Effective date: 20120601