CN201203668Y - Emission optical system for laser distance-measuring instrument - Google Patents
Emission optical system for laser distance-measuring instrument Download PDFInfo
- Publication number
- CN201203668Y CN201203668Y CNU2008200362498U CN200820036249U CN201203668Y CN 201203668 Y CN201203668 Y CN 201203668Y CN U2008200362498 U CNU2008200362498 U CN U2008200362498U CN 200820036249 U CN200820036249 U CN 200820036249U CN 201203668 Y CN201203668 Y CN 201203668Y
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- range finding
- prism
- laser range
- range finder
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to an emitting optical system of a laser range finer, which is capable of realizing reflectorless prism range finding mode and reflector prism range finding mode in one laser range finder. The system comprises an emitting optical system including a diaphragm connected to a diaphragm shift device, which is used for controlling the emitting light paths of the diaphragm entering or exiting the emitting optical system. In the reflectorless prism range finding mode, the diaphragm exists the light path, such that a photoelectric converter in the laser range finder can receive the strong diffuse reflection light of the surface of an object to be tested, thus satisfying the range finding requirements in reflectorless prism range finding mode. In reflector prism range finding mode, the diaphragm enters into the emitting light path, since the reflector prism has good reflecting efficiency, the diaphragm can effectively reduces the power of the emitting beam emitted from the laser range finder, and meets the requirements of the divergence angle of the emitting beam, thus realizing range finding in reflector prism range finding mode.
Description
Technical field
The utility model relates to a kind of optical transmitting system of laser range finder.
Background technology
The basic system of laser ranging system has been known.For example: Chinese patent literature notification number CN2265525Y discloses a kind of pulse semiconductor laser distance measuring equipment, comprise: signal transmitting system, receiving system, microprocessor and display, its signal transmitting system is made up of impulse semiconductor laser, side cut lens, and receiving system is by forming with side cut lens condenser lens, snoot, interference filter, the avalanche photodide be close to of cutting edge.Chinese patent literature notification number CN1034142C discloses a kind of distance-measuring equipment, has a visible light measuring beam that is produced by semiconductor laser; Collimating apparatus object lens are used for collimating at the steering handle measuring beam of the optical axis of collimating apparatus object lens; The circuit arrangement of a modulation measuring beam; A receiving objective is used to receive and the measuring beam that a remote testee reflects is imaged onto a receiving trap; The light-deflection apparatus that can insert is used to produce an internal reference distance between semiconductor laser and receiving trap; With an electronic analysis device, be used to measure and show the distance of measured testee.Wherein, receiving trap has one section light transmitting fiber to be connected with photoelectric commutator, wherein the light transmitting fiber plane of incidence is placed in the imaging plane of receiving objective for measuring remote object, and the may command plane of incidence moves perpendicular to optical axis the position thus.
The distance measurement mode of existing laser range finder comprises no reflection events prism distance measurement mode and the reflecting prism distance measurement mode is arranged.When under no reflection events prism distance measurement mode, finding range, laser range finder is to be abutted against the diffuse light of receiving the testee surface to find range, measurement range is generally 0.5-400m, therefore require measuring beam to have bigger power, and require the angle of divergence of emission light beam less, to reduce because the error that the out-of-flatness on testee surface brings.When under the reflecting prism distance measurement mode is arranged, finding range, because reflecting prism has extraordinary reflection efficiency, measurement range is generally 1.5-5000m, therefore the power of requirement emission light beam can not be too big, simultaneously for ease of sighting target when the telemeasurement, this requires the angle of divergence of emission light beam can not be too small.Obviously, above-mentioned two kinds of distance measurement modes are diametrically opposite to the requirement of laser range finder, therefore are unfavorable for realizing in same laser range finder simultaneously.
The utility model content
Technical problem to be solved in the utility model provides the optical transmitting system of realizing no reflection events prism distance measurement mode in a kind of same laser range finder and the laser range finder of reflecting prism distance measurement mode being arranged.
For solving the problems of the technologies described above, the optical transmitting system of laser range finder of the present utility model, comprise: diaphragm is characterized in: this diaphragm links to each other with a diaphragm shift unit, and the diaphragm shift unit is used to control the emission light path that diaphragm moved into or shifted out optical transmitting system.
Described diaphragm shift unit is fixedlyed connected with an end of diaphragm for conversion motor, the rotating shaft of conversion motor.
Described diaphragm is the rectangular opening diaphragm.
The utlity model has positive effect: in (1) laser range finder of the present utility model, diaphragm links to each other with the diaphragm shift unit, moves into or shift out the emission light path of optical transmitting system with the control diaphragm.When under no reflection events prism distance measurement mode, finding range, diaphragm is shifted out the emission light path, thus the diffuse light on the testee surface that the photoelectric commutator in the laser range finder can receive byer force, and then satisfy the range finding needs of no reflection events prism distance measurement mode.When under the reflecting prism distance measurement mode is arranged, finding range, diaphragm is moved into the emission light path, because reflecting prism has extraordinary reflection efficiency, diaphragm can weaken effectively from the power of the emission light beam of laser range finder ejaculation, and the needs of the angle of divergence of satisfied emission light beam, so satisfied the range finding work that reflecting prism range finding mould is arranged.Therefore, just can carry out range finding work at no reflection events prism distance measurement mode under the reflecting prism distance measurement mode with having respectively in the laser range finder of the present utility model, make things convenient for use.(2) in the laser range finder of the present utility model, the diaphragm shift unit is for the conversion motor, and is simple in structure, with low cost; Diaphragm is the rectangular opening diaphragm, is suitable for effectively weakening the power of emission light beam, to satisfy the range finding needs that have under the reflecting prism distance measurement mode.
Description of drawings
Fig. 1 is the structural representation of the laser range finder of embodiment 1, and wherein, diaphragm is moved into the emission light path of optical transmitting system;
The structural representation of the laser range finder when Fig. 2 is moved out of the emission light path of optical transmitting system for diaphragm;
Fig. 3 is the reception optical module among Fig. 1 and the structure for amplifying synoptic diagram of second deflecting plate;
Fig. 4 is that A among Fig. 2 is to view.
Embodiment
(embodiment 1)
See Fig. 1-4, the laser range finder of present embodiment comprises: optical transmitting system, receiving optics and range finding control and counting circuit system.
Optical transmitting system comprises diaphragm 2, laser instrument and is located at the collimating apparatus 1 of laser optical line output terminal.
See Fig. 4, diaphragm 2 is the rectangular opening diaphragm.One end of diaphragm 2 is fixedly linked with the rotating shaft of conversion motor 3, and conversion motor 3 is used to control the emission light path 21 that diaphragm 2 moved into or shifted out optical transmitting system.
Be provided with the interior light path switching device 4 that is used for refracted ray on the emission light path 21 of collimating apparatus 1 front end, a side of interior light path switching device 4 is provided with the interior light path optical fiber 5 that is used to receive described refracted ray.
Light path switching device 4 comprises in described: interior light path motor 4-1 and the refracting prisms 4-2 that is fixedly linked with the rotating shaft of interior light path motor 4-1; The light incident end face of light path optical fiber 5 is relative with refracting prisms 4-2 in described, and when refracting prisms 4-2 entered described emission light path, interior light path optical fiber 5 was suitable for receiving the refracted ray from described refracting prisms 4-2.
Receiving optics comprises: objective lens 6, the reception optical module 7 of being located at objective lens 6 rear ends, the reception optical fiber 8 that is used to receive reflection ray, the bifurcation fiber device 9 of being located at reception optical module 7 one sides and the photoelectric commutator 10 that links to each other with the end of bifurcation fiber device 9; Light path optical fiber 5 links to each other with the divergent ends of bifurcation fiber device 9 with reception optical fiber 8 in described.Photoelectric commutator 10 comprises: photoelectric commutator, distance calculation circuit and display circuit etc.The photosignal output terminal of photoelectric commutator 10 links to each other with the photosignal input end of range finding control and counting circuit system.The diaphragm control output end of range finding control and counting circuit system and interior light path are measured the control output end and are linked to each other with the power supply control input end of conversion motor 3 and the power supply control input end of interior light path motor 4-1 respectively.
Described objective lens 6 and reception optical module 7 are provided with focusing lens 13, image rotation prism group 14 and eyepiece graticule assembly 15 with being located on the central axis 11 on the central axis 11 of reception optical module 7 rear ends successively.
See Fig. 3, be arranged on reflective inclined-plane 7-3 and half-reflection and half-transmission tabula rasa 7-2 on the central axis 11 before and after described reception optical module 7 comprises; The light incident end face that receives optical fiber 8 is relative with reflective inclined-plane 7-3, to receive the light from reflective inclined-plane 7-3; The front end face of described half-reflection and half-transmission tabula rasa 7-2 is provided with high-reflecting film.
Described second deflecting plate 17 and reflective inclined-plane 7-3 are located at light-passing board 7-1 both sides.Light-passing board 7-1 mainly works to support second deflecting plate 17 and reflective inclined-plane 7-3.
Front end at emission light path 21 the above diaphragm 2 is provided with first deflecting plate 16, and shading sleeve 12 is provided with through hole 12-1; Between central axis 11 the above reflective inclined-plane 7-3 and objective lens 6, be provided with second deflecting plate 17; First deflecting plate 16 and second deflecting plate 17 are oppositely arranged, and the through hole 12-1 on the shading sleeve 12 is located between first deflecting plate 16 and second deflecting plate 17; During use, the light on the emission light path 21 passes the through hole 12-1 on the shading sleeve 12 after 16 reflections of first deflecting plate, penetrate from lens 6 after 17 reflections of second deflecting plate.
Also has the shading sleeve 12 that black rubber is made.The rear end of described shading sleeve 12 is placed on second deflecting plate 17, and the front end of shading sleeve 12 is placed on the rear end of objective lens 6.
In ranging phase method, an important techniques index is exactly a circular error, and circular error bad student's reason is exactly because co-channel interference.In Fig. 1 and 3, the emission light beam passes objective lens 6 outgoing after by second deflecting plate 17, the inevitable faint reflection of generation on the rear end face of objective lens 6, some enters into photoelectric commutator formation interference to these reflected light after by diffusion, these disturb when measuring under the reflecting prism distance measurement mode is arranged, because heliogram is stronger, does not form bigger error.But have when measuring under the reflecting prism distance measurement mode in nothing because very faint of heliogram can cause bigger error, experiment show its to the influence of circular error about 5mm.And in the present embodiment, the light major part of objective lens 6 reflection is by shading sleeve 12 its absorptions, and can't enter into photoelectric commutator, thereby reduced circular error greatly.
As Fig. 2, when under no reflection events prism distance measurement mode, finding range, diaphragm 2 shifts out the emission light path, thus the diffuse light on testee 19 surfaces that the photoelectric commutator in the laser range finder 10 can receive byer force, and then satisfy the range finding needs of no reflection events prism distance measurement mode.This moment, the power of the emission light beam that laser range finder penetrates was 5mW, and the angle of divergence is about 0.4mrad.
As Fig. 1, when under the reflecting prism distance measurement mode is arranged, finding range, diaphragm 2 moves into the emission light path, because reflecting prism 20 has extraordinary reflection efficiency, diaphragm 2 can weaken effectively from the power of the emission light beam of laser range finder ejaculation, and the needs of the angle of divergence of satisfied emission light beam, this moment, the power of the emission light beam that laser range finder penetrates was 0.5mW, the angle of divergence is about 2.4mrad.Because light has produced diffraction when the slit by diaphragm 2, enlarged the angle of divergence, when telemeasurement, facilitate like this and sight prism, measure and do not have prism and measure compatible problem thereby solved prism.
Claims (3)
1, a kind of optical transmitting system of laser range finder comprises diaphragm (2), it is characterized in that: this diaphragm (2) links to each other with a diaphragm shift unit, and the diaphragm shift unit is used to control the emission light path (21) that diaphragm (2) moved into or shifted out optical transmitting system.
2, the optical transmitting system of laser range finder according to claim 1 is characterized in that: described diaphragm shift unit is conversion motor (3), and the rotating shaft of conversion motor (3) is fixedlyed connected with an end of diaphragm (2).
3, the optical transmitting system of laser range finder according to claim 2 is characterized in that: described diaphragm (2) is the rectangular opening diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200362498U CN201203668Y (en) | 2008-05-27 | 2008-05-27 | Emission optical system for laser distance-measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200362498U CN201203668Y (en) | 2008-05-27 | 2008-05-27 | Emission optical system for laser distance-measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201203668Y true CN201203668Y (en) | 2009-03-04 |
Family
ID=40425980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200362498U Expired - Lifetime CN201203668Y (en) | 2008-05-27 | 2008-05-27 | Emission optical system for laser distance-measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201203668Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446490B (en) * | 2008-12-25 | 2010-11-10 | 常州市新瑞得仪器有限公司 | Laser range finder |
| CN109443091A (en) * | 2018-10-12 | 2019-03-08 | 北京航空航天大学 | A kind of miniaturization laser target designator |
-
2008
- 2008-05-27 CN CNU2008200362498U patent/CN201203668Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446490B (en) * | 2008-12-25 | 2010-11-10 | 常州市新瑞得仪器有限公司 | Laser range finder |
| CN109443091A (en) * | 2018-10-12 | 2019-03-08 | 北京航空航天大学 | A kind of miniaturization laser target designator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101446490B (en) | Laser range finder | |
| JP4121803B2 (en) | Lightwave distance measuring device | |
| CN201622345U (en) | Laser distance measurement device | |
| CN102298245B (en) | Aerial camera focusing system | |
| CN210015229U (en) | Distance detection device | |
| JPH1184003A (en) | Light wave distance-measuring device | |
| CN208255406U (en) | A kind of portable light shaft detection instrument | |
| CN110687542A (en) | Off-axis scanning distance measuring system and method | |
| CN102636151A (en) | Laser range finder and range finding method thereof | |
| CN105973170A (en) | Polarization beam combining auto-collimation optical path system based on birefringence element | |
| JP2002181933A (en) | Laser distance measuring apparatus for wide-range measurement equipped with special photodetector | |
| WO2020092192A1 (en) | Parallax compensating spatial filters | |
| CN104777486A (en) | Handheld laser short-distance measurement instrument | |
| US6556283B2 (en) | Electronic distance meter | |
| CN201203668Y (en) | Emission optical system for laser distance-measuring instrument | |
| CN104501972A (en) | Compound shack-hartmann wave-front sensor | |
| CN201203667Y (en) | Receive optical system for laser distance-measuring instrument | |
| CN201203670Y (en) | Laser distance-measuring instrument | |
| CN113391295A (en) | Laser radar scanning system and device | |
| CN212569122U (en) | Laser range finder system capable of automatically calibrating optical axis | |
| CN104849718A (en) | Laser range finder | |
| US20010050764A1 (en) | Surveying instrument having an optical distance meter | |
| CN107238840B (en) | Pulse laser high-speed distance measuring optical system | |
| CN113296079B (en) | Remote photoelectric detection system | |
| CN202649466U (en) | Laser range finder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090304 |
|
| CX01 | Expiry of patent term |