CN201203670Y - Laser distance-measuring instrument - Google Patents
Laser distance-measuring instrument Download PDFInfo
- Publication number
- CN201203670Y CN201203670Y CNU2008200362483U CN200820036248U CN201203670Y CN 201203670 Y CN201203670 Y CN 201203670Y CN U2008200362483 U CNU2008200362483 U CN U2008200362483U CN 200820036248 U CN200820036248 U CN 200820036248U CN 201203670 Y CN201203670 Y CN 201203670Y
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- Prior art keywords
- light path
- optical fiber
- deflecting plate
- range finder
- laser range
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Abstract
The utility model relates to a laser range finder having a simple optical system and small measuring error, which comprises an emitting optical system and a receiving optical system, wherein the emitting optical system comprises a laser and a collimator on the light output end of the laser, and has an emitting light path, the emitting light path on the front end of the collimator is provided with an inner light path switch system for refracted light, one side of the inner light path switch system is provided with an inner light path optical fiber for receiving the refracted light; and the receiving optical system comprises an objective group, a receiving optical component at the back end of the objective group, a receiving optical fiber arranged at one side of the receiving optical component and used for receiving refracted light, a branched optical fiber device and a photoelectric converter connected to the end of the branched optical fiber; the inner light path optical fiber and the receiving optical fiber are connected to the branched end of the branched optical fiber.
Description
Technical field
The utility model relates to a kind 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 interior light path system of existing laser range finder and the structure of receiving light path system are complicated, and measuring error is bigger, and reliability is lower, cost is higher.
The utility model content
Technical problem to be solved in the utility model provides the simple and less laser range finder of measuring error of a kind of optical system.
For solving the problems of the technologies described above, laser range finder of the present utility model comprises: optical transmitting system and receiving optics; Optical transmitting system comprises: laser instrument and the collimating apparatus of being located at the laser optical line output terminal; Have the emission light path in the optical transmitting system, be provided with the interior light path switching device that is used for refracted ray on the described emission light path of collimating apparatus front end, a side of interior light path switching device is provided with the interior light path optical fiber that is used to receive described refracted ray; Receiving optics comprises: objective lens, the reception optical module of being located at the objective lens rear end, the reception optical fiber that is used to receive reflection ray, the bifurcation fiber device of being located at reception optical module one side and the photoelectric commutator that links to each other with the end of bifurcation fiber device; Light path optical fiber links to each other with the divergent ends of bifurcation fiber device with reception optical fiber in described.
Light path switching device comprises in described: interior light path motor and the refracting prisms that are fixedly linked with the rotating shaft of interior light path motor; The light incident end face of interior light path optical fiber is relative with refracting prisms, and when refracting prisms entered the emission light path, interior light path optical fiber was suitable for receiving the refracted ray from described refracting prisms.
Be provided with shading sleeve between described objective lens rear end and the reception optical module.
Described objective lens and reception optical module are provided with focusing lens, image rotation prism group and eyepiece graticule assembly with being located on the central axis on the central axis of reception optical module rear end successively.
Before and after comprising, described reception optical module is arranged on reflective inclined-plane and half-reflection and half-transmission tabula rasa on the central axis; The light incident end face that receives optical fiber is relative with reflective inclined-plane, to receive the light from reflective inclined-plane; The front end face of described half-reflection and half-transmission tabula rasa is provided with high-reflecting film.
In the technique scheme, be provided with first deflecting plate at the front end of launching the above diaphragm of light path, shading sleeve is provided with through hole; Between the above reflective inclined-plane of central axis and objective lens, be provided with second deflecting plate; First deflecting plate and second deflecting plate are oppositely arranged, and the through hole on the shading sleeve is located between first deflecting plate and second deflecting plate; During use, the light on the emission light path passes the through hole on the shading sleeve after the reflection of first deflecting plate, penetrate from lens after the reflection of second deflecting plate.
In the technique scheme, also comprise light-passing board; The light-passing board both sides are located on described second deflecting plate and reflective inclined-plane; The rear end of described shading sleeve is placed on the light-passing board.
The utlity model has positive effect: (1) laser range finder of the present utility model adopts ranging phase method, in order to compensate the drift of find range in the laser range finder control and counting circuit system and opto-electronic conversion, need measure the drift amount, concrete grammar is, will launch light and be directly coupled in the photoelectric commutator through interior light path switching device and interior light path optical fiber and measure.Total reflection effect by optical fiber can improve the phase uniformity of accepting light greatly, thereby has reduced measuring error.Interior light path optical fiber links to each other with the bifurcation fiber device with reception optical fiber, has simplified the structure of optical system, makes the layout of electronic circuit to be very easy to simultaneously, has reduced the interference of instrument internal, thereby has reduced cost of products, has improved reliability.(2) interior light path switching device of the present utility model has adopted interior light path driven by motor refracting prisms, in needs are measured during light path, interior light path driven by motor refracting prisms forward between the interior light path optical fiber of emission light beam and bifurcation fiber, and emission is coupled light in the photoelectric commutator.(3) in the utility model, be provided with shading sleeve between objective lens rear end and the reception optical module, the light major part of objective lens rear end face reflection absorbed by shading sleeve, and can't enter into photoelectric commutator, thereby reduced the circular error of ranging phase method greatly.(4) in the utility model, the front end face of half-reflection and half-transmission tabula rasa is provided with high-reflecting film, behind the front end face and the reflection of reflective inclined-plane of half-reflection and half-transmission tabula rasa, sends into reception optical fiber with most of light that objective lens is received; The half-reflection and half-transmission tabula rasa is delivered to the eyepiece graticule assembly with remaining light simultaneously, for manual observation.
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 21, 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 emission light path 21, 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 emission light path 21, 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 (6)
1, a kind of laser range finder comprises optical transmitting system and receiving optics;
Optical transmitting system comprises: laser instrument and the collimating apparatus (1) of being located at the laser optical line output terminal; Has emission light path (21) in the optical transmitting system, be provided with the interior light path switching device (4) that is used for refracted ray on the described 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;
Receiving optics comprises: objective lens (6), the reception optical module (7) of being located at objective lens (6) rear end, 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.
2, laser range finder according to claim 1 is characterized in that: light path switching device (4) comprising in described: interior light path motor (4-1) and the refracting prisms (4-2) that are 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 (21), interior light path optical fiber (5) was suitable for receiving the refracted ray from described refracting prisms (4-2).
3, laser range finder according to claim 2, it is characterized in that: 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 end successively.
4, laser range finder according to claim 3 is characterized in that: 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.
5, laser range finder according to claim 4 is characterized in that: the front end at emission the above diaphragm of light path (21) (2) is provided with first deflecting plate (16); Between the above reflective inclined-plane (7-3) of central axis (11) and objective lens (6), be provided with second deflecting plate (17); First deflecting plate (16) is oppositely arranged with second deflecting plate (17); During use, the light on the emission light path (21) penetrates from lens (6) after first deflecting plate (16), second deflecting plate (17) reflection successively.
6, laser range finder according to claim 5 is characterized in that: also comprise light-passing board (7-1); Described second deflecting plate (17) and reflective inclined-plane (7-3) are located at light-passing board (7-1) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200362483U CN201203670Y (en) | 2008-05-27 | 2008-05-27 | Laser distance-measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200362483U CN201203670Y (en) | 2008-05-27 | 2008-05-27 | Laser distance-measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201203670Y true CN201203670Y (en) | 2009-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200362483U Expired - Lifetime CN201203670Y (en) | 2008-05-27 | 2008-05-27 | Laser distance-measuring instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN201203670Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426027A (en) * | 2011-09-05 | 2012-04-25 | 南京德朔实业有限公司 | Inner optical system control and switching apparatus for laser range finder |
| CN116482656A (en) * | 2023-06-21 | 2023-07-25 | 华中科技大学 | Light path control switching device in laser range finder |
-
2008
- 2008-05-27 CN CNU2008200362483U patent/CN201203670Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426027A (en) * | 2011-09-05 | 2012-04-25 | 南京德朔实业有限公司 | Inner optical system control and switching apparatus for laser range finder |
| CN102426027B (en) * | 2011-09-05 | 2013-10-02 | 南京德朔实业有限公司 | Inner optical system control and switching apparatus for laser range finder |
| CN116482656A (en) * | 2023-06-21 | 2023-07-25 | 华中科技大学 | Light path control switching device in laser range finder |
| CN116482656B (en) * | 2023-06-21 | 2023-09-22 | 华中科技大学 | Light path control switching device in laser range finder |
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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 |