CN101706578A - Eyesafe laser range finder - Google Patents
Eyesafe laser range finder Download PDFInfo
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- CN101706578A CN101706578A CN200910063071A CN200910063071A CN101706578A CN 101706578 A CN101706578 A CN 101706578A CN 200910063071 A CN200910063071 A CN 200910063071A CN 200910063071 A CN200910063071 A CN 200910063071A CN 101706578 A CN101706578 A CN 101706578A
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- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000013078 crystal Substances 0.000 claims description 26
- 230000010287 polarization Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 14
- 229910052691 Erbium Inorganic materials 0.000 claims description 3
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000005693 optoelectronics Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 210000000695 crystalline len Anatomy 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 210000001525 retina Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
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Abstract
The invention relates to an eyesafe laser range finder and belongs to the technical field of laser range finding equipment. The laser range finder comprises a transmitting and receiving optical system, a laser, a laser power supply, an information processor, a low-voltage power supply and a receiving circuit, wherein the transmitting and the receiving optical system adopts the same telescope system for transmission and reception; the laser directly outputs linearly polarized laser or acquires linearly polarized laser output by arranging a polarizer outside a cavity, the laser is eyesafe, and the output wavelength of the laser ranges from 1.5 to 1.6mum; and the information processor is connected with external equipment directly or by an interface to realize data and information transmission. The eyesafe laser range finder of the invention is safe to eyes, small in volume, light in weight, high in nonlinear conversion rate and high in light split efficiency and can satisfy the applications needs for the multi-sensor integration and minimization of novel optoelectronic devices.
Description
Technical field
The present invention relates to a kind of eye-safe laser range finder, belong to the Laser Distance Measuring Equipment technical field, what be specifically related to is a kind of emission, reception light path polarization spectro eye-safe laser range finder altogether, be applicable in the optoelectronic device, be specially adapted to portable, compact, powered battery class photoelectricity is seen and taken aim in the equipment.
Background technology
The range information of target is to survey, follow the tracks of one of important information that kind equipment need obtain.
Optical distance measurement apparatus is the image height by measurement target, and composite focal distance, target true altitude are obtained the range information of target.The main deficiency of optical distance measurement apparatus is: precision is low, operating distance is near, can't work under the situation of objective fuzzy.
The radio radar range finding is far away than optical ranging operating distance, precision is high, but exposes easily.
The laser range finder antijamming capability is strong, operating distance is far away, distance accuracy is high, through successful being applied in the multiple electro-optical system of years of development, has brought into play very big effect.
Existing pulse laser laser welder adopts the 0.8-1.4 mu m waveband laser as light source more, adopts emission, receives discrete optical system, and main deficiency is:
1, human eye can't directly be seen the light of 0.8-1.4 mu m waveband, and the laser radiation of this wave band is behind human eye, and crystalline lens absorbs seldom it, and major part focuses on the retina, causes the expendable injury of retina easily, even blind.
2, emission, to receive discrete optical system volume, weight bigger, can't satisfy the needs of the integrated and miniaturization of novel photoelectric equipment multisensor.
Summary of the invention
The objective of the invention is to, overcome the deficiency that existing pulse laser laser welder exists, provide a kind of laser radiation comparatively safe and volume is little, in light weight, non-linear conversion efficient height, spectroscopical effeciency height, can satisfy the compact eye-safe laser range finder of the application need of the integrated and miniaturization of novel photoelectric equipment multisensor human eye.
Technical scheme of the present invention is:
A kind of eye-safe laser range finder, it comprises emission, receiving optics, laser instrument, Laser Power Devices, message handler, low-tension supply, receiving circuit; Described emission, receiving optics, its emission, the shared telescopic system of reception; Described laser instrument is the laser instrument of direct output line polarization laser, or adds the laser instrument that polariscope obtains linearly polarized laser output in the chamber; Described laser instrument is the laser instrument of eye-safe, and its output wavelength is 1.5～1.6 μ m; Described message handler is by interface or directly link to each other the realization data information transmission with external unit.
Further scheme with additional technical feature is:
Described eye-safe laser range finder, its emission, receiving optics comprise with the corresponding catoptron of laser instrument, photodetector, with the corresponding eyepiece of photodetector, narrow band pass filter, polariscope, with the corresponding eyepiece of polariscope, object lens, wave plate.
Described eye-safe laser range finder, its polariscope are polarization splitting prism, or the polariscope of polaroid formation; Described wave plate is a quarter wave plate, or the polarization rotating mirror; Described photodetector is an avalanche photodide, or photoelectric diode, or the photoelectric diode of band prime amplifier.
Described eye-safe laser range finder, its laser output wavelength are 1.57 μ m.
Described eye-safe laser range finder, its laser output wavelength are 1.54 μ m.
Described eye-safe laser range finder, its laser instrument are the laser instruments of 1.06 μ m pulse laser pumping noncritical phase matching inner chamber optical parametric oscillators, or erbium glass laser.
Described eye-safe laser range finder, its low-tension supply are the 18-36V direct current, are power supply or the battery through rectification.
Described eye-safe laser range finder, its message handler passes through interface, or directly links to each other with the external unit main control computer.
Described eye-safe laser range finder, its laser instrument is the laser instrument of direct output line polarization laser, it comprises a resonator cavity, this resonator cavity comprise with the corresponding eyeglass of working-laser material, working-laser material, adjusting Q crystal, with the corresponding eyeglass of adjusting Q crystal, ktp crystal, with the corresponding eyeglass of ktp crystal.
Described eye-safe laser range finder, the described and corresponding eyeglass of working-laser material is made of the film system that is plated in the working-laser material end face; Constitute by the film system that is plated in the ktp crystal both ends of the surface respectively with the corresponding eyeglass of adjusting Q crystal and with the corresponding eyeglass of ktp crystal.
The principle of work of human eye safety laser range finder of the present invention is as follows:
When opening laser range finder " power supply " switch and pressing " emission " switch, message handler is to the signal of Laser Power Devices transmissions " emission laser ", and Laser Power Devices control flashlamp discharge provides pump energy to laser instrument.The laser of laser instrument output is the directive detected target behind mirror reflects, polarizer reflective, telescope optical system compression, wave plate, and the main ripple sample circuit in the receiving circuit collects behind the main ripple through shaping carry information processor simultaneously, starts range counter.The laser of being returned by target reflection converges on the detector APD through wave plate, telescope optical system, polariscope, imaging optical system, and the echoed signal of APD output carry information processor after amplifying shaping cuts out range counter.Message handler is presented at range information on the display unit or sends to main control computer through interface after finishing counting, so finishes a complete ranging process.
Obvious technical effects of the present invention:
1, used optical system is utilized the polarization characteristic of laser, adopts polariscope and wave plate to realize emission, receive shared telescopic system, has reduced the volume and weight of system, the spectroscopical effeciency height.
2, the laser instrument of eye-safe laser range finder of the present invention, its output wavelength be the laser radiation of 1.5-1.6 mu m waveband behind human eye, the overwhelming majority is absorbed by crystalline lens, having only seldom, a part arrives retina, comparatively safe to human eye, be the light source of laser range finder first-selection of new generation.
3, the resonator cavity chamber mirror film system of used laser instrument all is plated in crystal end-face, has reduced the volume and weight of laser instrument; Laser instrument is the output line polarization laser directly, and to eye-safe; Laser instrument adopts noncritical phase matching inner chamber optical parametric oscillator technology, non-linear conversion efficient height.
Description of drawings
Fig. 1 is the structured flowchart of human eye safety laser range finder of the present invention;
Fig. 2 is a human eye safety laser range finder optical system synoptic diagram of the present invention;
Fig. 3 is a human eye safety laser range finder laser resonant cavity structural representation of the present invention.
Among the figure: 1-target, 2-emission, receiving optics, 3-laser instrument, the 4-Laser Power Devices, 5-message handler, 6-main control computer, the 7-low-tension supply, the 8-receiving circuit, 10-catoptron, 11-photodetector, the corresponding eyepiece of 12-and photodetector, the 13-narrow band pass filter, 14-polariscope, the corresponding eyepiece of 15-and polariscope, the 16-object lens, the 17-wave plate, the corresponding eyeglass of 18-and working-laser material, 19-working-laser material, the 20-adjusting Q crystal, the corresponding eyeglass of 21-and adjusting Q crystal, 22-KTP crystal, the corresponding eyeglass of 23-and ktp crystal.
Embodiment
It is as follows that the invention will be further described in conjunction with the accompanying drawings and embodiments.
Embodiment 1:
As shown in Figure 1, be one embodiment of the present of invention principle of work and structured flowchart.A kind of eye-safe laser range finder, it is made up of emission, receiving optics 2, laser instrument 3, Laser Power Devices 4, message handler 5, low-tension supply 7, receiving circuit 8; Described emission, receiving optics 2, its emission, the shared telescopic system of reception; Described laser instrument 3 is the laser instrument of direct output line polarization laser; Described laser instrument 3 is the laser instrument of eye-safe, and its output wavelength is 1.5～1.6 μ m, compare with the 0.8-1.4 mu m waveband laser of prior art, and be safe to human eye, present embodiment is 1.57 μ m; Described message handler 5 links to each other with external unit main control computer 6 by RS 232 interfaces, realizes data information transmission.Fig. 2 is a human eye safety laser range finder optical system synoptic diagram of the present invention, is main optical path figure; This optical routing emission, receiving optics 2, with laser instrument 3 corresponding catoptrons 10, photodetector 11, with the corresponding eyepiece 12 of photodetector, narrow band pass filter 13, polariscope 14, form with the corresponding eyepiece 15 of polariscope, object lens 16, wave plate 17.Polariscope 14 is a polarization splitting prism; Wave plate 17 is quarter wave plates, and described photodetector 11 is an avalanche photodide.Described laser instrument 3 is laser instruments of 1.06 μ m pulse laser pumping noncritical phase matching inner chamber optical parametric oscillators.Low-tension supply 7 is the 18-36V direct current, is the power supply through rectification, also can be battery.Message handler 5 links to each other with external unit main control computer 6 by interface.Described laser instrument is the laser instrument of direct output line polarization laser, as shown in Figure 3, it has a resonator cavity, this resonator cavity by one with the corresponding eyeglass 18 of working-laser material (1064nm is all-trans) and working-laser material 19, adjusting Q crystal 20, with the corresponding eyeglass 21 of adjusting Q crystal (1064nm is high, and saturating, 1570nm is all-trans), ktp crystal 22, form with the corresponding eyeglass 23 of ktp crystal (1064nm is all-trans, the transmission of 1570nm part).Described and the corresponding eyeglass 18 of working-laser material is made of the film system that is plated in working-laser material 19 end faces; Be made of the film system that is plated in ktp crystal 22 both ends of the surface respectively with the corresponding eyeglass 21 of adjusting Q crystal and with the corresponding eyeglass 23 of ktp crystal, purpose is the volume that reduces laser instrument.
Combination technology scheme and principle of work are done following further specifying: as shown in Figure 1, the injection Conversion of energy that laser instrument 3 provides Laser Power Devices 4 is the eye-safe pulse laser, and it is coupled into emission, receiving optics 2, directive target 1, the laser that is reflected by target 1 is through emission, receiving optics 2 focuses on after photodetector 11 is converted to electric signal and transfers to receiving circuit 8 processing, message handler 5 calculates Laser emission, the time interval between the received signal, and be scaled range data and be presented on the display unit or be sent to main control computer 6, low-tension supply 7 is a receiving circuit 8, message handler 5 provides low-tension supply.As shown in Figure 2, the linearly polarized light of eye-safe laser instrument 9 outgoing is by catoptron 10, polariscope 14 reflections, warp and the corresponding eyepiece 15 of polariscope, behind the object lens 16, become circularly polarized light directive target by wave plate 17, the laser of returning through target reflection becomes linearly polarized light by wave plate 17 once more, cause is passed through wave plate 17 twice, its polarization direction is revolved and is turn 90 degrees, through object lens 16, directly pass through when arriving polariscope 14 with the corresponding eyepiece 15 of polariscope, and through narrow band pass filter 13, with corresponding eyepiece 12 focal imagings of photodetector on snowslide pipe 11 photosurfaces, so finish a ranging process.
Different with the foregoing description is: described eye-safe laser range finder, laser instrument 3 are to add the laser instrument that polariscope obtains linearly polarized laser output in the chamber, and message handler 5 directly links to each other for external display device with external unit 6 by interface.The polariscope that polariscope 14 constitutes for polaroid; Wave plate 17 is polarization rotating mirrors; Described photodetector 11 is a photoelectric diode, and erbium glass laser 3 output wavelengths are 1.54 μ m, and low-tension supply 7 is a battery.
Embodiment 3:
Different with the foregoing description is: described eye-safe laser range finder, laser instrument 3 output wavelengths are 1.5 μ m, and described photodetector 11 is the photoelectric diode of band prime amplifier.
Embodiment 4:
Different with the foregoing description is: described eye-safe laser range finder, laser instrument 3 output wavelengths are 1.6 μ m, and described photodetector 11 is an avalanche photodide.
Claims (8)
1. an eye-safe laser range finder is characterized in that, it comprises emission, receiving optics (2), laser instrument (3), Laser Power Devices (4), message handler (5), low-tension supply (7), receiving circuit (8); Described emission, receiving optics (2), its emission, the shared telescopic system of reception; Described laser instrument (3) is the laser instrument of direct output line polarization laser, or adds the laser instrument that polariscope obtains linearly polarized laser output in the chamber; Described laser instrument (3) is the laser instrument of eye-safe, and its output wavelength is 1.5～1.6 μ m; Described message handler (5) is by interface or directly link to each other the realization data information transmission with external unit.
2. eye-safe laser range finder according to claim 1, it is characterized in that, described emission, receiving optics (2) comprise with the corresponding catoptron of laser instrument (3) (10), photodetector (11), with the corresponding eyepiece of photodetector (12), narrow band pass filter (13), polariscope (14), with the corresponding eyepiece of polariscope (15), object lens (16), wave plate (17).
3. eye-safe laser range finder according to claim 2 is characterized in that, described polariscope (14) is a polarization splitting prism, or the polariscope of polaroid formation; Described wave plate (17) is a quarter wave plate, or the polarization rotating mirror; Described photodetector (11) is an avalanche photodide, or photoelectric diode, or the photoelectric diode of band prime amplifier.
4. eye-safe laser range finder according to claim 1 is characterized in that, its output wavelength of described laser instrument (3) is 1.57 μ m.
5. eye-safe laser range finder according to claim 1 is characterized in that, its output wavelength of described laser instrument (3) is 1.54 μ m.
6. eye-safe laser range finder according to claim 1 is characterized in that, described laser instrument (3) is the laser instrument of 1.06 μ m pulse laser pumping noncritical phase matching inner chamber optical parametric oscillators, or erbium glass laser.
7. eye-safe laser range finder according to claim 1, it is characterized in that, the laser instrument of described direct output line polarization laser, it comprises a resonator cavity, this resonator cavity comprise with the corresponding eyeglass of working-laser material (18), working-laser material (19), adjusting Q crystal (20), with the corresponding eyeglass of adjusting Q crystal (21), ktp crystal (22), with the corresponding eyeglass of ktp crystal (23).
8. eye-safe laser range finder according to claim 7 is characterized in that, the described and corresponding eyeglass of working-laser material (18) is made of the film system that is plated in working-laser material (19) end face; Constitute by the film system that is plated in ktp crystal (22) both ends of the surface respectively with the corresponding eyeglass of adjusting Q crystal (21) and with the corresponding eyeglass of ktp crystal (23).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100630715A CN101706578B (en) | 2009-07-07 | 2009-07-07 | Eyesafe laser range finder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100630715A CN101706578B (en) | 2009-07-07 | 2009-07-07 | Eyesafe laser range finder |
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| CN101706578A true CN101706578A (en) | 2010-05-12 |
| CN101706578B CN101706578B (en) | 2012-08-08 |
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| CN2009100630715A Expired - Fee Related CN101706578B (en) | 2009-07-07 | 2009-07-07 | Eyesafe laser range finder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608079A (en) * | 2012-03-03 | 2012-07-25 | 南昌航空大学 | Detection method of long-distance laser induced plasma spectrum |
| CN102866403A (en) * | 2011-07-06 | 2013-01-09 | 长春中俄科技园股份有限公司 | Eye safety laser distance measuring equipment |
| CN108181628A (en) * | 2018-01-23 | 2018-06-19 | 上海兰宝传感科技股份有限公司 | A kind of anti-interference distance measuring sensor based on TOF |
| CN111505657A (en) * | 2020-05-29 | 2020-08-07 | 洛阳顶扬光电技术有限公司 | Distance measuring system suitable for small laser illuminator |
| CN111525382A (en) * | 2020-03-20 | 2020-08-11 | 北京国泰蓝盾科技有限公司 | High-stability airborne laser illuminator capable of continuously emitting light for long time |
| CN112799089A (en) * | 2021-02-07 | 2021-05-14 | 苏州同人激光科技有限公司 | Eye-safe laser range finder and method |
| CN113566649A (en) * | 2021-08-06 | 2021-10-29 | 江苏亮点光电研究有限公司 | High-magnification laser beam expanding lens for shooting training and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216562A (en) * | 2007-01-05 | 2008-07-09 | 薛志强 | Laser distance measuring system |
-
2009
- 2009-07-07 CN CN2009100630715A patent/CN101706578B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866403A (en) * | 2011-07-06 | 2013-01-09 | 长春中俄科技园股份有限公司 | Eye safety laser distance measuring equipment |
| CN102608079A (en) * | 2012-03-03 | 2012-07-25 | 南昌航空大学 | Detection method of long-distance laser induced plasma spectrum |
| CN102608079B (en) * | 2012-03-03 | 2015-04-08 | 南昌航空大学 | Detection method of long-distance laser induced plasma spectrum |
| CN108181628A (en) * | 2018-01-23 | 2018-06-19 | 上海兰宝传感科技股份有限公司 | A kind of anti-interference distance measuring sensor based on TOF |
| CN111525382A (en) * | 2020-03-20 | 2020-08-11 | 北京国泰蓝盾科技有限公司 | High-stability airborne laser illuminator capable of continuously emitting light for long time |
| CN111505657A (en) * | 2020-05-29 | 2020-08-07 | 洛阳顶扬光电技术有限公司 | Distance measuring system suitable for small laser illuminator |
| CN112799089A (en) * | 2021-02-07 | 2021-05-14 | 苏州同人激光科技有限公司 | Eye-safe laser range finder and method |
| CN113566649A (en) * | 2021-08-06 | 2021-10-29 | 江苏亮点光电研究有限公司 | High-magnification laser beam expanding lens for shooting training and application thereof |
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| CN101706578B (en) | 2012-08-08 |
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