CN102004373A - Underwater imaging device for annular laser lighting - Google Patents
Underwater imaging device for annular laser lighting Download PDFInfo
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- CN102004373A CN102004373A CN201010293845.6A CN201010293845A CN102004373A CN 102004373 A CN102004373 A CN 102004373A CN 201010293845 A CN201010293845 A CN 201010293845A CN 102004373 A CN102004373 A CN 102004373A
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Abstract
The invention relates to an underwater imaging device for annular laser lighting, comprising an optical window, an shell, a lighting optical device, a receiving and detecting device and an electronic control module, wherein the light optical device composed of a laser, a beam expander, a front lens, a rear lens and an all-trans lens is arranged in the shell; and the receiving and detecting device is composed of a zoom lens and a camera. The imaging device is characterized by comprising an annular all-trans lens and a beam-transforming device, wherein the annular all-trans lens is arranged in front of the zoom lens, is coaxial with the zoom lens and the camera, and is placed at an angle of 45 degrees; and the beam-transforming device is arranged between the beam expander and the front lens and causes Gaussian beam sent by the laser to be transformed into annular beams. The imaging device of the invention has high imaging quality, can acquire clearer images under the condition of being far away from turbid body of water, is a novel underwater imaging device for underwater detecting operation, and plays an importation role in ocean detection in our country.
Description
Technical field
The invention belongs to technical field of imaging under water, be specifically related to a kind of imaging device under water of loop laser illumination.
Background technology
Be imaged under water that submarine target is found, have extensively in sea materials detection and the ocean geography engineering and important use is worth, just be subjected to various countries researcher's pay attention to day by day.Concerning imaging under water, back scattering is a major reason that influences image quality, and backward scattered influence just becomes all the more obvious for muddy water body.In common imaging technique under water, adopt Halogen lamp LED as lighting source, not only power consumption is big, and imaging effect is subjected to the water body diffuse transmission influence serious, and imaging effect is very poor under the situation of water body muddiness.And laser brightness height, good directionality are the lighting sources of comparatively paying close attention in recent years.General laser lighting is again in conjunction with technological means such as range gating, laser line scannings, can effectively reduce backward scattered influence, however range gating method cost height, complicated operation, and the laser line scanning imaging time is long, and since the rocking of water body need between the image effectively to proofread and correct.
Summary of the invention
The present invention is directed to the influence of back scattering, adopt the loop laser conduct lighting source of imaging device under water, provide a kind of imaging device under water of loop laser illumination, to remedy the deficiencies in the prior art to imaging under water.
The present invention adopts loop laser as lighting source, and the field angle of regulating lighting source emergence angle and video camera makes it coupling, and the camera field of view angle is positioned in the annular laser beams.Laser is in the water body transmission course, with the particle generation scattering in the water body, because laser is loop configuration, and laser beam divergence is not less than the reception field angle, therefore in video camera receives the visual field, can not produce direct back scattering, can reduce the influence of water body back scattering to a great extent to imaging under water, in the laser propagation process,, illuminate annular laser beams simultaneously with interior zone by the scattering of particle in the water body.
The present invention includes: comprise the illumination path device of forming by laser instrument, beam expanding lens, front lens, rear lens and total reflective mirror in the shell body, shell body of optical window; The reception sniffer that zoom lens and video camera are formed, and electronic control module; It is characterized in that also comprising that is positioned at ring-type total reflective mirrors before the zoom lens, coaxial with zoom lens and video camera, 45 degree placements, and between beam expanding lens and front lens, be provided with the optical beam transformation device that a Gaussian beam that laser instrument is sent becomes annular beam.
Above-mentioned optical beam transformation device is made of front glass cone and back glass cone, and two glass cone cone angles are between 60～120 °, and the awl point is fixed in the housing relatively.Parallel Gaussian beam incides on the front glass cone, and light beam is assembled to front glass cone awl point, forms to bore the cone-shaped beam that point is the center, incides then on the glass cone of back to become the ring-type directional light after the refraction.
The present invention adopts the semiconductor green (light) laser, volume is little, in light weight, efficient is high, working stability is reliable, more than the laser emitting power 500mW, power consumption is less than 50W, easily going up hectowatt with general illuminating lamp compares, greatly reduce power consumption, be more suitable for using under water, also be better than general diode pumped solid state laser.
Above-mentioned video camera adopts the colour TV camera of light sensitivity less than 0.1Lux.The reception field angle of this video camera is by the electric control zooming camera adjusting, and receiving field angle must be complementary with the laser emitting angle, and its principle is smaller or equal to the laser emitting angle of divergence.
The present invention has avoided direct back scattering by simple optical beam transformation, has overcome imaging back scattering under water to the serious problem of image influence, improves image quality greatly, can obtain comparatively distinct image under the remote situation of muddy water body.Installation cost is low, easy to use, reached the target of practicability, miniaturization.Can independently bear or be equipped on underwater hiding-machine by the frogman during use cable underwater robot (ROV) is arranged, autonomous under water formula is dived on device (AUV) and the boats and ships, carry out flexible undersea detection, obtain clear target image, have wide scientific research, dual-use market outlook.
Description of drawings
Fig. 1 general structure synoptic diagram of the present invention.
Fig. 2 optical beam transformation apparatus structure of the present invention and light path principle synoptic diagram thereof.
Wherein: 1, shell body; 2, laser instrument; 3, beam expanding lens; 4, optical beam transformation device; 5, front lens; 6, rear lens; 7, total reflective mirror; 8, ring-type total reflective mirror; 9, optical window; 10, zoom lens; 11, video camera; 12, electronic control module; 13, front glass cone; 14, back glass cone; 15, housing.
Embodiment
As Fig. 1, the present invention includes optical window 9 at interior shell body 1, in the shell body 1 by laser instrument 2, beam expanding lens 3, front lens 5, the illumination path device that rear lens 6 and total reflective mirror 7 are formed, the reception sniffer that zoom lens 10 and video camera 11 are formed, and electronic control module 12, it is characterized in that also comprising that one is positioned at before the zoom lens 10, coaxial with zoom lens 10 and video camera 11, and the ring-type total reflective mirror 8 that 45 degree are placed is provided with the optical beam transformation device 4 that a Gaussian beam that laser instrument 2 is sent becomes annular beam again between beam expanding lens 3 and front lens 5.
As shown in Figure 2, optical beam transformation device 4 is made of two duplicate glass cones 13,14, and two glass cones, 13,14 cone angles are between 60～120 °, and awl point relatively and embed and be fixed in the housing 15.The parallel Gaussian beam that laser instrument 2 sends incides on the front glass cone 13, and light beam glass neck 13 awl points is forward assembled, and forms to bore the cone-shaped beam that point is the center, incides then on the glass neck 14 of back to become the ring-type directional light after the refraction.
The directional light that above-mentioned laser instrument 2 sends shines on the front lens 5, converges at the focus place of front lens 5, and laser instrument 2 is the semiconductor green (light) laser, more than the laser emitting power 500mW.Front lens 5 and rear lens 6 are formed emergent light angle of divergence converting means, and directional light shines on the front lens 5, converges at the focus place of front lens 5, by changing the position of rear lens 6, it are moved between one times of focal length, can realize the adjusting of laser beam divergence.
Above-mentioned video camera 11 adopts the low-light (level) colour TV camera, and light sensitivity is less than 0.1Lux.Receive field angle and regulate by electric control zooming camera lens 10, receiving field angle must be complementary with the laser emitting angle, and its principle is smaller or equal to the laser emitting angle of divergence.
Above-mentioned ring-type total reflective mirror 8 adopts loop configuration, and is coaxial with zoom lens 10 and video camera 11, and 45 degree are placed, and realizes the emission of laser beam and the reception of image under water simultaneously by ring-type total reflective mirror 8.Ring-type total reflective mirror 8 adopts annular hollow structure, and is coaxial with zoom lens 10 and video camera 11, and 45 degree are placed, and realizes the emission of laser beam and the reception of image under water simultaneously by ring-type total reflective mirror 8.
The course of work of the present invention is as follows:
1) opening power is carried out initialization, checks whether video camera 11 and laser instrument 2 are in normal operating conditions;
2) zoom lens 10 and the rear lens 6 of adjustment video camera 11 make it to be in the initial setting state, and this moment, video camera 11 lens focus were the shortest, the visual field maximum;
3) observe situation under water by monitor on the bank or on the deck, after finding target,, regulate video camera zoom lens 10 focal lengths and rear lens 6 positions successively, to obtain optimized image according to receiving the principle that field angle is less than or equal to laser beam divergence.
Claims (4)
1. the imaging device under water of loop laser illumination comprises the illumination path device of being made up of laser instrument (2), beam expanding lens (3), front lens (5), rear lens (6) and total reflective mirror (7) in the shell body (1), shell body (1) of optical window (9); The reception sniffer that zoom lens (10) and video camera (11) are formed, and electronic control module (12), it is characterized in that also comprising that one is positioned at that zoom lens (10) is before,, ring-type total reflective mirror (8) that 45 degree place coaxial with zoom lens (10) and video camera (11), and between beam expanding lens (3) and front lens (5), be provided with the optical beam transformation device (4) that a Gaussian beam that laser instrument (2) is sent becomes annular beam.
2. the imaging device under water of loop laser illumination as claimed in claim 1, it is characterized in that above-mentioned optical beam transformation device (4) is made of front glass cone (13) and front glass cone (14), two glass cones (13,14) cone angle is between 60～120 °, the awl point is fixed in the housing (15) relatively.
3. the imaging device under water of loop laser illumination as claimed in claim 1 is characterized in that above-mentioned laser instrument (2) is the above semiconductor green (light) laser of laser emitting power 500mW.
4. the imaging device under water of loop laser illumination as claimed in claim 1 is characterized in that above-mentioned video camera (11) is the colour TV camera of light sensitivity less than 0.1Lux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010293845.6A CN102004373A (en) | 2010-09-21 | 2010-09-21 | Underwater imaging device for annular laser lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010293845.6A CN102004373A (en) | 2010-09-21 | 2010-09-21 | Underwater imaging device for annular laser lighting |
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| CN102004373A true CN102004373A (en) | 2011-04-06 |
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| CN201010293845.6A Pending CN102004373A (en) | 2010-09-21 | 2010-09-21 | Underwater imaging device for annular laser lighting |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053460A (en) * | 2010-11-05 | 2011-05-11 | 胡团 | Beam-expandable laser projection device and laser camera head |
| CN104539920A (en) * | 2015-01-09 | 2015-04-22 | 中国石油大学(华东) | Underwater television system video color imaging system |
| CN106770052A (en) * | 2016-11-22 | 2017-05-31 | 哈尔滨工业大学 | A kind of device for perceiving water body scatterer changes of contents |
| CN107748444A (en) * | 2017-12-01 | 2018-03-02 | 中国科学院长春光学精密机械与物理研究所 | A kind of polarised light wide visual field transmission-type convergence lighting device and method |
| CN107906470A (en) * | 2017-11-29 | 2018-04-13 | 马瑞利汽车零部件(芜湖)有限公司 | The vehicle signal lamp system of annular illumination |
| CN108006507A (en) * | 2017-12-11 | 2018-05-08 | 广东羿斐信息科技有限公司 | A kind of underwater lamp with function for monitoring |
| WO2019033395A1 (en) * | 2017-08-18 | 2019-02-21 | 刘颂东 | Portable amphibious light-triggered/medium-macro photography light supplement system |
| CN109973858A (en) * | 2017-12-28 | 2019-07-05 | 中国科学院深圳先进技术研究院 | A kind of luminaire for underwater dark-field imaging |
| GB2573637A (en) * | 2018-03-29 | 2019-11-13 | Shimadzu Corp | Underwater laser light source |
| CN112558383A (en) * | 2021-01-05 | 2021-03-26 | 深圳市本特利科技有限公司 | Zooming illumination device for underwater target detection |
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| JP2003043567A (en) * | 2001-07-27 | 2003-02-13 | Fuji Photo Optical Co Ltd | Camera housing |
| US20030058738A1 (en) * | 2001-09-17 | 2003-03-27 | Erikson Kenneth R. | Co-registered acoustical and optical cameras for underwater imaging |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053460A (en) * | 2010-11-05 | 2011-05-11 | 胡团 | Beam-expandable laser projection device and laser camera head |
| CN104539920A (en) * | 2015-01-09 | 2015-04-22 | 中国石油大学(华东) | Underwater television system video color imaging system |
| CN106770052A (en) * | 2016-11-22 | 2017-05-31 | 哈尔滨工业大学 | A kind of device for perceiving water body scatterer changes of contents |
| CN106770052B (en) * | 2016-11-22 | 2019-05-17 | 哈尔滨工业大学 | A kind of device perceiving water body scatterer changes of contents |
| WO2019033395A1 (en) * | 2017-08-18 | 2019-02-21 | 刘颂东 | Portable amphibious light-triggered/medium-macro photography light supplement system |
| CN107906470A (en) * | 2017-11-29 | 2018-04-13 | 马瑞利汽车零部件(芜湖)有限公司 | The vehicle signal lamp system of annular illumination |
| CN107748444A (en) * | 2017-12-01 | 2018-03-02 | 中国科学院长春光学精密机械与物理研究所 | A kind of polarised light wide visual field transmission-type convergence lighting device and method |
| CN108006507A (en) * | 2017-12-11 | 2018-05-08 | 广东羿斐信息科技有限公司 | A kind of underwater lamp with function for monitoring |
| CN109973858A (en) * | 2017-12-28 | 2019-07-05 | 中国科学院深圳先进技术研究院 | A kind of luminaire for underwater dark-field imaging |
| CN109973858B (en) * | 2017-12-28 | 2022-03-08 | 中国科学院深圳先进技术研究院 | Illuminator for underwater dark field imaging |
| GB2573637A (en) * | 2018-03-29 | 2019-11-13 | Shimadzu Corp | Underwater laser light source |
| GB2573637B (en) * | 2018-03-29 | 2021-10-06 | Shimadzu Corp | Underwater semiconductor laser light source |
| CN112558383A (en) * | 2021-01-05 | 2021-03-26 | 深圳市本特利科技有限公司 | Zooming illumination device for underwater target detection |
| CN112558383B (en) * | 2021-01-05 | 2022-02-01 | 深圳市本特利科技有限公司 | Be used for target detection under water to zoom lighting apparatus |
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Application publication date: 20110406 |