CN104950452A - Light spot homogenization apparatus of illumination module group of semiconductor laser - Google Patents
Light spot homogenization apparatus of illumination module group of semiconductor laser Download PDFInfo
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- CN104950452A CN104950452A CN201410139471.0A CN201410139471A CN104950452A CN 104950452 A CN104950452 A CN 104950452A CN 201410139471 A CN201410139471 A CN 201410139471A CN 104950452 A CN104950452 A CN 104950452A
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- semiconductor laser
- plano
- convex lens
- light spot
- lenticule
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
Abstract
The invention relates to a light spot homogenization apparatus of an illumination module group of a semiconductor laser. A semiconductor laser, a micro lens, an optical homogenization plate, and a plano-convex lens are successively arranged at the same horizontal straight line. The semiconductor laser emits laser irradiating the micro lens; abd the laser passes through a dual-face micro lens array and is split into multiple beams of light by a first micro lens unit group in the micro lens, and then the light is overlapped mutually in a second group micro lens array to carry out light spot homogenization. Dual homogenization is carried out on the emitted light beams by the optical homogenization plate, so that an interference problem of the laser light beam when the beam passes through an array at a second layer can be solved and thus the energy of the laser light beam becomes uniform. The light beams after homogenization passes through the plano-convex lens. When the distance between the plano-convex lens and the optical homogenization plate is changed, the divergence angles of the emitted light beams can be adjusted; matching is carried out according to camera lens with different focal lengths; and application to different occasions can be realized.
Description
Technical field
The present invention relates to a kind of light spot homogenizing device of semiconductor laser illumination module, belong to lighting technical field.
Background technology
Monitoring trade is through the development of decades, and due to the demand in market and the progress of technology, CCTV camera starts to enter the high definition epoch.High-definition camera is good imaging quality by day, but the infrared LED module owing to coordinating high-definition camera to use in the market under night-environment, illumination distances is limited, thus limits image quality and the image-forming range of high-definition camera, because which limit the use of high-definition camera at night.
The photoelectric transformation efficiency of semiconductor laser is more than 60%, far away higher than the photoelectric transformation efficiency of infrared LED, the advantages such as its energy consumption is low, heat accumulation is few in device, the life-span is long, collimation good, illumination distances is far away are more and more extensive as a kind of emerging night vision technology application at safety-security area.The wavelength adopted in current night observation device is the infrared LED array of 850nm, illumination distances is limited, within 60 meters, and adopt the semiconductor laser of 808nm as night vision illumination die set light source, illumination distances is greater than 100 meters, meanwhile, video camera CCD or cmos sensor higher by 1/3 than the wavelength response degree of infrared LED to the wavelength response degree of laser instrument, real remote floor light can be realized.
Chinese patent CN203178574U discloses " a kind of laser night-vision device process for light beam homogenization device ", it comprises semiconductor laser and lens combination, microlens array is disposed with between semiconductor laser and lens combination, polygon prism and frosted glass, described lens combination comprises beam expanding lens and focus lamp, when the laser that semiconductor laser sends is irradiated on microlens array, a lot of luminous luminous point is formed after microlens array, each luminous luminous point is equivalent to a little light source, then each little light source is mutually overlapping a long way off after polygon prism and frosted glass, thus realize light spot homogenizing, effectively overcome the coherence of laser beam, light beam after the homogenize of homogenize device group expands the focusing with focus lamp through beam expanding lens again, realize energy more concentrated.But this patent uses lens number more, and complex structure, reduces the transmitance of laser to a certain extent, cause inner heat serious, illumination distances is restricted.
Chinese patent CN202008568U discloses " a kind of laser illuminator of light spot homogenizing process ", comprise heat dissipation base and camera lens, described heat dissipation base is provided with laser instrument, in described camera lens, lens are installed, be provided with an optical tunnel between wherein said heat dissipation base and camera lens, described laser instrument, optical tunnel and lens are positioned on same level straight line, and optical tunnel is rectangular cylindrical glass bar, the length breadth ratio of this rectangular cylindrical glass bar is between 6: 1 to 14: 1, and flakiness ratio is 4: 3.Compared with prior art, 4: 3 uniform light spots of the laser illuminator generation of light spot homogenizing process of the present invention, can be synchronous with existing CCD monitored picture, realize long distance illumination, its theoretical efficiency of light energy utilization can reach 100%, but the optical tunnel that this patent uses adopts the scattering principle of light to carry out homogenize to laser, homogenize efficiency is low, weak effect, simultaneously very large to the light loss of laser instrument, be unfavorable for the utilization factor of laser.
Chinese patent CN103279000A discloses and a kind ofly adopts the laser illuminator system rotating even mating plate homogenize, relate to a kind of laser illuminator system, solving existing homogenizer can only the large striped of part light and shade in removal of images, also can produce serious laser speckle simultaneously, have a strong impact on the problem of illuminating effect, comprise semiconductor laser, homogenizer and lens combination; Described semiconductor laser sends laser beam and be incident to lens combination after homogenizer homogenize, forms uniform hot spot through lens combination outgoing to light projection surface, and described homogenizer is at least a wheelwork and even mating plate, for carrying out homogenize process to laser speckle.Need whirligig in this patent, need to increase extra motor to drive whirligig, whole system is complicated, and can not accomplish miniaturization, cannot portable use, and practicality is not strong.
Summary of the invention
Not enough for prior art, the invention provides a kind of light spot homogenizing device of semiconductor laser illumination module, to solve on market the problems such as the excessive and laser transmittance of device volume in existing laser facula homogenizing method is low.After adopting structure of the present invention to carry out light spot homogenizing, light spot homogenizing is effective, clear picture, and device volume is little, and structure is simple.
Terminological interpretation:
1, CCD:Charge-coupled Device, the abbreviation of charge coupled cell.
2, CMOS:Complementary Metal Oxide Semiconductor, the abbreviation of complementary metal oxide semiconductor (CMOS).
The present invention is by the following technical solutions:
A light spot homogenizing device for semiconductor laser illumination module, the light path of this device sets gradually semiconductor laser, lenticule, optics homogenize sheet and plano-convex lens; Described semiconductor laser, lenticule, optics homogenize sheet and plano-convex lens are positioned on same level straight line.
There is the operating distance of 10mm-20mm between described semiconductor laser and lenticule, between lenticule and optics homogenize sheet, have the operating distance of 12mm-20mm;
Described semiconductor laser is 808nm semiconductor laser, is used for carrying out the illumination light filling of night vision device;
Described lenticule adopts two-sided microlens array, described two-sided microlens array is a kind of lens of array format, be two groups of microlens arrays, namely first group of microlens array is equivalent to lenticule wherein one side, and second group of microlens array is equivalent to lenticular another side;
Described optics homogenize sheet is ordinary optical homogenize sheet, between lenticule and plano-convex lens;
Described plano-convex lens is one side convex lens;
Distance between described plano-convex lens and optics homogenize sheet can regulate, and can be adjusted the angle of divergence of irradiating light beam by the distance changed between plano-convex lens and optics homogenize sheet, the camera lens according to different focal mates, and is applied to different occasion; Distance between plano-convex lens and optics homogenize sheet is far away, and the angle of divergence is less, and irradiation distance is far away.
Beneficial effect of the present invention:
The light spot homogenizing device of a kind of semiconductor laser illumination module of the present invention, laser is sent by semiconductor laser, be irradiated on lenticule, laser is after two-sided microlens array, first is multi-beam by group lenticule cellular spliting of first in lenticule, then mutually overlapping in second group of microlens array, hot spot is carried out homogenize; Outgoing beam carries out dual homogenize through optics homogenize sheet again, effectively prevent laser beam by interference problem during second layer array, makes laser beam energy more even; Light beam after homogenize eventually passes plano-convex lens, and by changing the distance between plano-convex lens and optics homogenize sheet, can adjust the angle of divergence of irradiating light beam, the camera lens according to different focal mates, and is applied to different occasion.Utilize the CCTV camera of the light spot homogenizing device of semiconductor laser illumination module of the present invention, monitoring distance can be greater than 120 meters.
Accompanying drawing explanation
Accompanying drawing 1 is the structured flowchart of the light spot homogenizing device of semiconductor laser illumination module of the present invention.
In figure, 1, semiconductor laser; 2, lenticule; 3, optics homogenize sheet; 4, plano-convex lens.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail, but is not limited thereto.
Embodiment 1,
As shown in Figure 1, a kind of light spot homogenizing device of semiconductor laser illumination module, luminous light path sets gradually semiconductor laser 1, lenticule 2, optics homogenize sheet 3 and plano-convex lens 4; Described semiconductor laser 1, lenticule 2, optics homogenize sheet 3 and plano-convex lens 4 are positioned on same level straight line.There is the operating distance of 10mm between described semiconductor laser 1 and lenticule 2, between lenticule 2 and optics homogenize sheet 3, have the operating distance of 12mm; Described semiconductor laser 1 is 808nm semiconductor laser, is used for carrying out the illumination light filling of night vision device; Described lenticule 2 adopts two-sided microlens array, described two-sided microlens array is a kind of lens of array format, be two groups of microlens arrays, namely first group of microlens array is equivalent to lenticule wherein one side, and second group of microlens array is equivalent to lenticular another side; Described optics homogenize sheet 3 is ordinary optical homogenize sheet, between lenticule 2 and plano-convex lens 4; Described plano-convex lens 4 is one side convex lens.
The light spot homogenizing device of a kind of semiconductor laser illumination module of the present invention, the laser sent by semiconductor laser 1 is first through lenticule 2, because lenticule 2 is two groups of microlens arrays, laser first forms multiple little luminous point by first group of microlens array of lenticule 2, each little luminous point is equivalent to a little secondary light source, then each secondary light source carries out mutually overlapping through second group of microlens array of lenticule 2, thus realize the first homogenize of hot spot, laser beam through first homogenize carries out dual homogenize by optics homogenize sheet 3 again, effectively prevent laser beam to mix at the stria by being produced by laser beam coherent interference during second group of microlens array the problem of spot, make laser beam energy more even, image is more clear, light beam after dual homogenize is finally by the plano-convex lens 4 be positioned in light path, the distance changed between plano-convex lens 4 and optics homogenize sheet 3 can adjust the angle of divergence of irradiating light beam, by tuning up the distance between plano-convex lens 4 and optics homogenize sheet 3, the angle of divergence is diminished, thus make energy more concentrated, irradiation distance is farther, meets the requirement of remote monitor.
Embodiment 2,
The light spot homogenizing device of a kind of semiconductor laser illumination module as described in Example 1, its difference is,
There is the operating distance of 20mm between described semiconductor laser 1 and lenticule 2, between lenticule 2 and optics homogenize sheet 3, have the operating distance of 20mm.
Be more than the concrete introduction of the light spot homogenizing method to a kind of semiconductor laser illumination module that the present invention mentions, the part wherein do not described in detail is the public general knowledge of those of ordinary skill in the art.Protection scope of the present invention is as the criterion with the content of claim, and any equivalent transformation carried out based on technology enlightenment of the present invention, also within protection scope of the present invention.
Claims (7)
1. a light spot homogenizing device for semiconductor laser illumination module, the luminous light path of this device sets gradually semiconductor laser, lenticule, optics homogenize sheet and plano-convex lens; Described semiconductor laser, lenticule, optics homogenize sheet and plano-convex lens are positioned on same level straight line.
2. the light spot homogenizing device of a kind of semiconductor laser illumination module according to claim 1, it is characterized in that, there is the operating distance of 10mm-20mm between described semiconductor laser and lenticule, between lenticule and optics homogenize sheet, have the operating distance of 12mm-20mm.
3. the light spot homogenizing device of a kind of semiconductor laser illumination module according to claim 1, it is characterized in that, described semiconductor laser is 808nm semiconductor laser, is used for carrying out the illumination light filling of night vision device.
4. the light spot homogenizing device of a kind of semiconductor laser illumination module according to claim 1, it is characterized in that, described lenticule adopts two-sided microlens array, described two-sided microlens array is a kind of lens of array format, be two groups of microlens arrays, namely first group of microlens array is equivalent to lenticule wherein one side, and second group of microlens array is equivalent to lenticular another side.
5. the light spot homogenizing device of a kind of semiconductor laser illumination module according to claim 1, is characterized in that, described optics homogenize sheet is ordinary optical homogenize sheet, between lenticule and plano-convex lens.
6. the light spot homogenizing device of a kind of semiconductor laser illumination module according to claim 1, is characterized in that, described plano-convex lens is one side convex lens.
7. the light spot homogenizing device of a kind of semiconductor laser illumination module according to claim 1, it is characterized in that, distance between described plano-convex lens and optics homogenize sheet can regulate, the angle of divergence of irradiating light beam can be adjusted by the distance changed between plano-convex lens and optics homogenize sheet, camera lens according to different focal mates, and is applied to different occasion; Distance between plano-convex lens and optics homogenize sheet is far away, and the angle of divergence is less, and irradiation distance is far away.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410139471.0A CN104950452A (en) | 2014-03-31 | 2014-03-31 | Light spot homogenization apparatus of illumination module group of semiconductor laser |
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| CN201410139471.0A CN104950452A (en) | 2014-03-31 | 2014-03-31 | Light spot homogenization apparatus of illumination module group of semiconductor laser |
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| CN104950452A true CN104950452A (en) | 2015-09-30 |
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| CN201410139471.0A Pending CN104950452A (en) | 2014-03-31 | 2014-03-31 | Light spot homogenization apparatus of illumination module group of semiconductor laser |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105739102A (en) * | 2016-01-15 | 2016-07-06 | 深圳市三千米光电科技有限公司 | Infrared laser smoothing system based on VCSEL |
| CN105759444A (en) * | 2016-05-10 | 2016-07-13 | 中国科学技术大学 | Static speckle removal device based on lens array and laser projector |
| CN107453201A (en) * | 2017-09-08 | 2017-12-08 | 深圳市三千米光电科技有限公司 | The device of VCSEL laser divergence angle compressions can be carried out |
| CN107591679A (en) * | 2017-09-08 | 2018-01-16 | 深圳市三千米光电科技有限公司 | The device of VCSEL laser divergence angle compressions is carried out using doubly telecentric camera lens |
| CN108037589A (en) * | 2017-12-14 | 2018-05-15 | 中国科学院西安光学精密机械研究所 | A kind of laser beam shaping system applied to underwater camera lighting system |
| CN109616866A (en) * | 2019-01-03 | 2019-04-12 | 海特光电有限责任公司 | A kind of semiconductor laser light filling source of middle short distance |
| CN110058418A (en) * | 2019-05-31 | 2019-07-26 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | A kind of laser illuminator system and optical path adjusting method |
| CN111795921A (en) * | 2020-07-14 | 2020-10-20 | 南京理工大学 | Particle counter sensor beam homogenization and sharpening illumination system |
| CN112838473A (en) * | 2021-01-23 | 2021-05-25 | 成都壹程科技有限公司 | Homogenization method for remote light spots of semiconductor laser |
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Patent Citations (6)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105739102A (en) * | 2016-01-15 | 2016-07-06 | 深圳市三千米光电科技有限公司 | Infrared laser smoothing system based on VCSEL |
| CN105759444A (en) * | 2016-05-10 | 2016-07-13 | 中国科学技术大学 | Static speckle removal device based on lens array and laser projector |
| CN107453201A (en) * | 2017-09-08 | 2017-12-08 | 深圳市三千米光电科技有限公司 | The device of VCSEL laser divergence angle compressions can be carried out |
| CN107591679A (en) * | 2017-09-08 | 2018-01-16 | 深圳市三千米光电科技有限公司 | The device of VCSEL laser divergence angle compressions is carried out using doubly telecentric camera lens |
| CN108037589A (en) * | 2017-12-14 | 2018-05-15 | 中国科学院西安光学精密机械研究所 | A kind of laser beam shaping system applied to underwater camera lighting system |
| CN109616866A (en) * | 2019-01-03 | 2019-04-12 | 海特光电有限责任公司 | A kind of semiconductor laser light filling source of middle short distance |
| CN110058418A (en) * | 2019-05-31 | 2019-07-26 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | A kind of laser illuminator system and optical path adjusting method |
| CN111795921A (en) * | 2020-07-14 | 2020-10-20 | 南京理工大学 | Particle counter sensor beam homogenization and sharpening illumination system |
| CN111795921B (en) * | 2020-07-14 | 2023-08-22 | 南京理工大学 | Illumination system for particle counter sensor beam homogenization and sharpening |
| CN112838473A (en) * | 2021-01-23 | 2021-05-25 | 成都壹程科技有限公司 | Homogenization method for remote light spots of semiconductor laser |
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