CN102298215A - Homogenizing method for laser illumination and laser illumination device - Google Patents
Homogenizing method for laser illumination and laser illumination device Download PDFInfo
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- CN102298215A CN102298215A CN 201110273507 CN201110273507A CN102298215A CN 102298215 A CN102298215 A CN 102298215A CN 201110273507 CN201110273507 CN 201110273507 CN 201110273507 A CN201110273507 A CN 201110273507A CN 102298215 A CN102298215 A CN 102298215A
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- laser
- homogenizer
- lens combination
- vibration
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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
- G02B27/0933—Systems for active beam shaping by rapid movement of an element
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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
Abstract
The invention discloses a homogenizing method for laser illumination and a laser illumination device. The device comprises a semiconductor laser unit, a homogenizing device and a lens set; the semiconductor laser unit is used for emitting laser for irradiation; the homogenizing device is used for energy distribution homogenization on a vertical plane in the laser transmission direction; the lens set at least comprises a beam expander and a focusing lens which are used for expanding beams and focusing the laser for irradiation; and the device is also provided with a vibrating or rotating device for keeping relative vibration or rotation between at least two of the semiconductor laser unit, the homogenizing device and the lens set, and the vibrating or rotating period of the vibrating or rotating device is smaller than or equal to the time of an electronic shutter of a camera. According to the homogenizing method for laser illumination and the laser illumination device, because the vibrating or rotating homogenizing method and the laser illumination device are adopted, light and dark stripes in images and laser speckles in the images are eliminated.
Description
Technical field
The present invention relates to a kind of image capturing system and method, the homogenizing method of laser light filling and laser illuminator system thereof improve in particular a kind of infrared laser shooting process.
Background technology
In the prior art, along with the development of camera technique at night, the requirement of infrared laser light filling (or claiming the infrared laser illumination) is more and more higher, and most in the market employing semiconductor laser lightings carry out the infrared photography light filling.
Because there is the uneven defective of light energy distribution in semiconductor laser, generally adopt all kinds of light beam dispensers or optical fiber that laser beam is carried out homogenize in the market, but because the high coherence of laser itself, though the part light and shade striped in above-mentioned all homogenizing methods or the device meeting removal of images, but all can produce serious laser speckle (promptly having regional light and shade problem of non-uniform), have a strong impact on the sharpness of institute's image recording.
Do not have the thoroughly effective homogenizing method or the device of eliminate laser speckle in the market, therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide a kind of homogenizing method and laser illuminator system thereof of laser light filling, can solve because the defective of laser speckle (being that the staggered brightness irregularities situation of light and shade appears in the light projection surface) appears in the image recording at night that high coherence brought of laser, make image more clear, thoroughly eliminate laser speckle.
Technical scheme of the present invention is as follows:
The laser illuminator system of a kind of laser light filling homogenize, it comprises the semiconductor laser instrument, and a homogenizer and a lens combination;
Described semiconductor laser is used for emission irradiation laser; Described homogenizer is used for energy distribution homogenising on the vertical plane of laser conduction orientation; And a lens combination, comprise beam expanding lens and focus lamp at least, be respectively applied for and expand bundle and focus on irradiation laser; Wherein,
Also be provided with a vibration or a wheelwork, be used for keeping vibrating relatively or rotating of described semiconductor laser, homogenizer and described lens combination three at least between the two, and the cycle of its vibration or rotation be smaller or equal to the electronic shutter time of video camera.
Described laser illuminator system, wherein, described semiconductor laser adopts the laser diode of laser diode or the output of band optical fiber.
Described laser illuminator system, wherein, described homogenizer adopts at least a in optical fiber, frosted glass, multifaceted prism and the sieve aperture.
Described laser illuminator system, wherein, described vibration or wheelwork are arranged on arbitrary device in described laser instrument, homogenizer or the lens combination.
A kind of homogenizing method of laser light filling, it may further comprise the steps:
Adopt the semiconductor laser instrument, and a homogenizer and a lens combination are formed for the laser illuminator system of laser light filling; Described semiconductor laser is used for emission irradiation laser; Described homogenizer is used for energy distribution homogenising on the vertical plane of laser conduction orientation; And a lens combination, comprise beam expanding lens and focus lamp at least, be respectively applied for and expand bundle and focus on irradiation laser;
Keep among described semiconductor laser, homogenizer and the described lens combination three at least between the two relative to vibration or rotate, and the cycle of its vibration or rotation is smaller or equal to the electronic shutter time of video camera.
The homogenizing method of a kind of laser light filling provided by the present invention and laser illuminator system thereof, because the homogenizing method and the laser illuminator system that have adopted vibration or rotated, realized simultaneously the elimination of light and shade striped in the image and the laser speckle phenomenon in the image, make image need not to increase the sharpening of having realized image under the too expensive prerequisite, reached the actual market requirement of product.The present invention has solved fully because the laser speckle defective that high coherence produced of laser, has greatly promoted make a video recording at the night effect in field of infrared laser light filling, makes the image more clear.
Description of drawings
Fig. 1 is the structure function synoptic diagram of the homogenizing method laser illuminator system preferred embodiment of laser light filling of the present invention.
What Fig. 2 a, Fig. 2 b and Fig. 2 c illustrated respectively is the homogenizing method and the laser illuminator system principle of work synoptic diagram thereof of laser light filling of the present invention.
Fig. 3 is the homogenizing method and the laser illuminator system principle schematic thereof of laser light filling of the present invention.
Fig. 4 is the preferred embodiment synoptic diagram of the homogenizing method laser illuminator system of laser light filling of the present invention.
One two field picture of being shot with video-corder when the no homogenize that Fig. 5 a, Fig. 5 b and Fig. 5 c are respectively prior art is handled and the image recording effect when adopting light beam dispenser, optical fiber homogenizer respectively.
Fig. 5 d is the homogenizing method and the laser illuminator system image recording effect thereof of laser light filling of the present invention.
Fig. 6 is the homogenizing method of laser light filling of the present invention and the experimental provision synoptic diagram of laser illuminator system thereof.
Embodiment
Below in conjunction with accompanying drawing, will be described in more detail each preferred embodiment of the present invention.
The homogenizing method of laser light filling of the present invention and laser illuminator system thereof, as shown in Figure 1, be the complete light path theory of constitution figure of laser illuminator, wherein A is a semiconductor laser, comprise the laser diode of laser diode, the output of band optical fiber etc., be used for sending the laser of irradiation; B is a homogenizer, comprises at least a in optical fiber, frosted glass, multifaceted prism and the sieve aperture etc., is used for that laser is carried out the energy homogenize and handles; C is a lens combination, and its composition comprises beam expanding lens, focus lamp etc., is used for respectively irradiation is expanded bundle and focused on processing with laser; It is noted that, in the lens combination of the present invention preferably set-up mode be beam expanding lens preceding, focus lamp after, promptly need to expand earlier bundle and focus on again.
Be provided with a vibration or a wheelwork in the preferred embodiment of the present invention simultaneously, as shown in Figure 1, this vibration or wheelwork are more in the implementation of prior art, for example can adopt the eccentric wheel interlock of motor driven, perhaps rotate by motor driven, for example can gear drive or belt gear etc.The present invention is by vibration or wheelwork vibration or rotates among A, B, the C at least one, make and produce relative motion at least between the two among the three, make irradiation is carried out further homogenize processing with laser, thereby the laser light and shade zone fast crosstalk that is superimposed upon on the light projection surface is changed, so that the every bit on the light projection surface is all projected equably within a certain period of time.
Suppose that the video camera electronic shutter time that is used for shooting with video-corder is T, and described vibration or wheelwork to keep the cycle of the relative motion at least between the two in A, B, three parts of C be t, i.e. the assembly of relative motion returns the used time of initial position once more by the motion of initial position generating period.When satisfying t≤T, camera acquisition to laser light filling image because the staggered accumulation stack in light and shade zone all becomes fully evenly the brightness in any zone, so the not fogging clear defective that causes of eliminate laser speckle fully.
Therefore, the homogenizing method of laser light filling of the present invention and laser illuminator system thereof can solve fully owing to laser speckle defective in the image recording that high coherence produced of laser, greatly promoted make a video recording at the night effect in field of infrared laser light filling, made the image more clear.
Shown in Fig. 2 a and Fig. 2 b, when among A, B, the C relative motion takes place at least between the two the time, will make staggered variation the in laser speckle light and shade zone that is superimposed upon on the light projection surface, shown in Fig. 2 c, so at a complete relative motion cycle t in the time, laser speckle is in the variation that will take place on the light projection surface shown in Fig. 2 a to Fig. 2 c: the laser speckle distribution schematic diagram of half period before being relative motion as shown in Fig. 2 a; Fig. 2 b is the laser speckle distribution schematic diagram of half period after the relative motion; It shown in Fig. 2 c the accumulation stack of the laser speckle field in the complete t time in relative motion cycle.When t≤T, the present invention can solve the not fogging clear defective that laser speckle causes.
Adopt principle of work of the present invention,, the technique effect of preferred embodiment of the present invention is described to be example only at vibration or rotation homogenizer.
As shown in Figure 3, semiconductor laser 110 correspondences is A part among Fig. 1 in the homogenizing method of laser light filling of the present invention and the laser illuminator system thereof, homogenizer 120 correspondences be B part among Fig. 1; Beam expanding lens 131 and condenser lens 132 are corresponding is C part lens combination among Fig. 1; Dash area below described homogenizer 120 is illustrated as vibration or wheelwork 140 simultaneously, this vibration or wheelwork realize adopting common vibrating motor or revolution driving mechanism at present, for example gear or belt drives, by vibration or rotation homogenizer, to eliminate the laser speckle in the video camera institute images acquired.
As shown in Figure 4, in the homogenizing method of laser light filling of the present invention and the laser illuminator system thereof one is than specific embodiment, described semiconductor laser 110 has been arranged on the end of a cartridge type shell 210, in the tube chamber 211 of this cartridge type shell 210, be disposed with a homogenizer 120 and a lens combination 130, below this homogenizer 120, be provided with a vibrating device 140, concrete can be to drive described homogenizer 120 by vibrating motor, and this homogenizer 120 passes through a vibrating spring 121 flexible fastenings in described tube chamber 211.
Be Experimental equipment of the present invention as shown in Figure 6, wherein laser instrument 110, homogenizer 120 and lens combination 130 set gradually and form an optical system, and a vibrating device 140 is set below described homogenizer 120.What described homogenizer 120 adopted herein is frosted glass.Laser instrument 110 correspondences wherein be A part among Fig. 1; Homogenizer 120 correspondences be B part among Fig. 1; The lens combination correspondence be C part among Fig. 1; By the vibration homogenizer, experimental result shows, has eliminated the defective of laser speckle really.
In the preferred embodiment of the homogenizing method of laser light filling of the present invention, utilize above-mentioned vibration or wheelwork to realize vibrating relatively arbitrarily or rotate among laser instrument, homogenizer and the lens combination three between the two exactly, the cycle of its vibration or rotation is less than or equal to the aperture time of video camera, the process that the laser that so just can realize laser illumination is gone out carries out rapid homogenize, guarantee the uniform irradiation of light and shade luminance area, eliminate the laser speckle in the video camera image recording.
Shown in Fig. 5 a to Fig. 5 d the homogenizing method of each processing mode of prior art and laser light filling of the present invention and the treatment effect contrast synoptic diagram of laser illuminator system thereof.Prior art is not when carrying out any processing, and shown in Fig. 5 a, its image is extremely unintelligible and the light and shade striped is very obvious; Shown in Fig. 5 b and Fig. 5 c, it is the image after employing light beam dispenser (as frosted glass) homogenize or the optical fiber homogenize, its light and shade striped makes moderate progress, but the laser speckle phenomenon is serious, therefore only can eliminate part light and shade striped in the prior art, but because laser itself has the coherence, it is not considered or realizes elimination problem to laser speckle causing shooting with video-corder present night the impracticable of technology.Shown in Fig. 5 d, be the image after employing the present invention (as vibration frosted glass) homogenize, its clear no significant defect has reached the requirement of practicability.
Above experiment effect image is still image, but its contrast effect is very obvious, in the application of reality, and contrast dynamic video effect, homogenize technique effect of the present invention is then more outstanding.
Should be understood that above-mentioned description at preferred embodiment of the present invention is comparatively concrete, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (5)
1. the laser illuminator system of laser light filling homogenize, it comprises the semiconductor laser instrument, and a homogenizer and a lens combination;
Described semiconductor laser is used for emission irradiation laser; Described homogenizer is used for energy distribution homogenising on the vertical plane of laser conduction orientation; And a lens combination, comprise beam expanding lens and focus lamp at least, be respectively applied for and expand bundle and focus on irradiation laser; It is characterized in that,
Also be provided with a vibration or a wheelwork, be used for keeping vibrating relatively or rotating of described semiconductor laser, homogenizer and described lens combination three at least between the two, and the cycle of its vibration or rotation be smaller or equal to the electronic shutter time of video camera.
2. laser illuminator system according to claim 1 is characterized in that, described semiconductor laser adopts the laser diode of laser diode or the output of band optical fiber.
3. laser illuminator system according to claim 1 is characterized in that, described homogenizer adopts at least a in optical fiber, frosted glass, multifaceted prism and the sieve aperture.
4. laser illuminator system according to claim 1 is characterized in that, described vibration or wheelwork are arranged on arbitrary device in described laser instrument, homogenizer or the lens combination.
5. the homogenizing method of a laser light filling, it may further comprise the steps:
Adopt the semiconductor laser instrument, and a homogenizer and a lens combination are formed for the laser illuminator system of laser light filling; Described semiconductor laser is used for emission irradiation laser; Described homogenizer is used for energy distribution homogenising on the vertical plane of laser conduction orientation; And a lens combination, comprise beam expanding lens and focus lamp at least, be respectively applied for and expand bundle and focus on irradiation laser;
Keep among described semiconductor laser, homogenizer and the described lens combination three at least between the two relative to vibration or rotate, and the cycle of its vibration or rotation is smaller or equal to the electronic shutter time of video camera.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110273507 CN102298215B (en) | 2011-09-15 | 2011-09-15 | Homogenizing method for laser illumination and laser illumination device |
| PCT/CN2011/081774 WO2013037161A1 (en) | 2011-09-15 | 2011-11-04 | Homogenization method for laser lighting supplementation and laser illumination device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110273507 CN102298215B (en) | 2011-09-15 | 2011-09-15 | Homogenizing method for laser illumination and laser illumination device |
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| Publication Number | Publication Date |
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| CN102298215A true CN102298215A (en) | 2011-12-28 |
| CN102298215B CN102298215B (en) | 2013-06-12 |
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| CN 201110273507 Expired - Fee Related CN102298215B (en) | 2011-09-15 | 2011-09-15 | Homogenizing method for laser illumination and laser illumination device |
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| WO (1) | WO2013037161A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279000A (en) * | 2013-06-03 | 2013-09-04 | 吉林省晟世源科技有限公司 | Laser illuminating device which homogenizes with spinning light homogenizing sheet |
| CN103293678A (en) * | 2013-06-04 | 2013-09-11 | 中国人民解放军国防科学技术大学 | Even laser illuminating device based on supercontinuum source |
| CN105301791A (en) * | 2014-06-27 | 2016-02-03 | 哈尔滨工大华生电子有限公司 | Lighting device capable of homogenizing laser by utilizing relative movement of two frosted glass sheets |
| CN105404079A (en) * | 2014-09-09 | 2016-03-16 | 山东华光光电子有限公司 | Semiconductor laser lighting module with multiple divergence angles |
| CN106501945A (en) * | 2016-12-07 | 2017-03-15 | 深圳市佶达德科技有限公司 | The laser facula of noise spectra of semiconductor lasers output carries out the system and method for even light |
| CN106526882A (en) * | 2015-12-09 | 2017-03-22 | 西安域视光电科技有限公司 | Method and device for eliminating laser speckle |
| CN107242904A (en) * | 2017-07-19 | 2017-10-13 | 重庆半岛医疗科技有限公司 | A kind of beam homogenizing therapeutic system |
| CN107425410A (en) * | 2017-07-04 | 2017-12-01 | 丹东依镭社电子科技有限公司 | One kind is secondary to expand laser module |
| CN107783275A (en) * | 2016-08-26 | 2018-03-09 | 讯宝科技有限责任公司 | For reading the image-forming module and reader and method of target |
| CN107933941A (en) * | 2017-12-21 | 2018-04-20 | 超视界激光科技（苏州）有限公司 | A kind of unmanned vehicle and application with sealed beam lamp |
| CN108565673A (en) * | 2018-04-01 | 2018-09-21 | 额尔德尼毕利格 | Bar items for semiconductor laser are integrated |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279000A (en) * | 2013-06-03 | 2013-09-04 | 吉林省晟世源科技有限公司 | Laser illuminating device which homogenizes with spinning light homogenizing sheet |
| CN103293678A (en) * | 2013-06-04 | 2013-09-11 | 中国人民解放军国防科学技术大学 | Even laser illuminating device based on supercontinuum source |
| CN103293678B (en) * | 2013-06-04 | 2015-04-08 | 中国人民解放军国防科学技术大学 | Even laser illuminating device based on supercontinuum source |
| CN105301791A (en) * | 2014-06-27 | 2016-02-03 | 哈尔滨工大华生电子有限公司 | Lighting device capable of homogenizing laser by utilizing relative movement of two frosted glass sheets |
| CN105404079A (en) * | 2014-09-09 | 2016-03-16 | 山东华光光电子有限公司 | Semiconductor laser lighting module with multiple divergence angles |
| CN106526882A (en) * | 2015-12-09 | 2017-03-22 | 西安域视光电科技有限公司 | Method and device for eliminating laser speckle |
| CN106526882B (en) * | 2015-12-09 | 2018-06-26 | 西安域视光电科技有限公司 | A kind of method and device for eliminating laser speckle |
| CN107783275A (en) * | 2016-08-26 | 2018-03-09 | 讯宝科技有限责任公司 | For reading the image-forming module and reader and method of target |
| CN106501945A (en) * | 2016-12-07 | 2017-03-15 | 深圳市佶达德科技有限公司 | The laser facula of noise spectra of semiconductor lasers output carries out the system and method for even light |
| CN107425410A (en) * | 2017-07-04 | 2017-12-01 | 丹东依镭社电子科技有限公司 | One kind is secondary to expand laser module |
| CN107242904A (en) * | 2017-07-19 | 2017-10-13 | 重庆半岛医疗科技有限公司 | A kind of beam homogenizing therapeutic system |
| CN107242904B (en) * | 2017-07-19 | 2023-06-20 | 重庆半岛医疗科技有限公司 | Treatment device for homogenizing light beam |
| CN107933941A (en) * | 2017-12-21 | 2018-04-20 | 超视界激光科技（苏州）有限公司 | A kind of unmanned vehicle and application with sealed beam lamp |
| CN108565673A (en) * | 2018-04-01 | 2018-09-21 | 额尔德尼毕利格 | Bar items for semiconductor laser are integrated |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013037161A1 (en) | 2013-03-21 |
| CN102298215B (en) | 2013-06-12 |
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