CN102495512A - Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof - Google Patents
Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof Download PDFInfo
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- CN102495512A CN102495512A CN2011104236109A CN201110423610A CN102495512A CN 102495512 A CN102495512 A CN 102495512A CN 2011104236109 A CN2011104236109 A CN 2011104236109A CN 201110423610 A CN201110423610 A CN 201110423610A CN 102495512 A CN102495512 A CN 102495512A
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Abstract
The invention discloses a laser illuminator capable of continuously regulating an illumination angle in a large scale and a regulating method thereof. The laser illuminator comprises a laser for emitting lasers, and is sequentially provided with a short-focus lens and a homogenizing device; the laser, the short-focus lens and the homogenizing device are sequentially arranged on the same optical axis, the optical axis is further sequentially provided with a positive lens and a negative lens, and the positive lens can move along the optical axis forwards and backwards. The laser illuminator capable of continuously regulating the illumination angle in the large scale and the regulating method thereof, disclosed by the invention, utilizes a design scheme that the positive lens is arranged in the front of the negative lens, thus problems that a laser illuminator in the current market is hard to compatibly regulate the illumination angle and has lower utilization ratio of light energy are overcome, a vision angle of a camera and a light supplementing angle of an illuminator can be totally matched, and a light supplementing distance can totally meet a pickup distance of the camera in the market.
Description
Technical field
The present invention relates to a kind of laser illuminator system and method, in particular a kind of laser lighting light compensating apparatus and the method for adjustment thereof that can adjust light angle on a large scale continuously.
Background technology
In the prior art, along with the development of camera technique at night, for example night monitoring adopts infrared ray sensitization technology usually, just needs infrared illumination; Adopt the technology of infrared laser illumination (light filling) more and more general, the requirement of illumination quality is also increasingly high.
But the rising angle because of semiconductor laser is fixed, so illumination distances can be limited.The in the market employing by positive and negative two lens formed the adjustable function of the formula of falling Galileo telescope configuration completion light angle more; As shown in Figure 1, laser penetrates from laser instrument 110, handles through the homogenize of a homogenizer 120; The formula of falling the Galileo telescope configuration of forming through negative lens 130 and positive lens 140 again; Wherein negative lens 130 is accomplished the expansion bundle of laser, and positive lens 140 is accomplished the collimation of laser, can accomplish the adjustable purpose of laser radiation angle through moving negative lens.
But there is following problem in the lighting device of above-mentioned prior art: the wide-angle of finding a view of one of which, present video camera has reached 60 degree; And existing laser illuminator maximum angle is more much smaller than the needed wide-angle of video camera on the market, has just produced significantly " electric torch " effect; Two, the semiconductor laser utilization ratio of laser energy is not high, can produce a large amount of heats, influences laser life-span, and illumination distances is shorter, is difficult to bring into play the advantage of laser medium and long distance illumination; Three, be difficult to take into account low-angle illumination and semiconductor laser capacity usage ratio, make that the scope of illumination can't adaptive needed field of view angle; Four, volume is excessive, influences range of application.
Therefore, prior art awaits to improve and development.
Summary of the invention
The object of the present invention is to provide a kind of laser illuminator and the method for adjustment thereof that can adjust light angle on a large scale continuously, the optical system that it adopted realizes can adjusting continuously of the large and small angle of laser illuminator, and improves the utilization factor of laser energy.
Technical scheme of the present invention comprises:
A kind of laser illuminator that can adjust light angle on a large scale continuously, its setting comprises that one is used to launch the laser instrument of laser, wherein, and, a short focus lens and a homogenizer that sets gradually; Said laser instrument, said short focus lens and said homogenizer are successively set on the same optical axis, and on this optical axis, also are disposed with a positive lens and a negative lens, and said positive lens can move forward and backward along said optical axis.
Described laser illuminator, wherein, said short focus lens converges to laser beam on the homogenizer, and the hot spot on the homogenizer is less than 2.5mm * 2.5mm.
Described laser illuminator, wherein, said positive lens and the combination of said negative lens form a combination of lenses module.
Described laser illuminator, wherein, the focus of said combination of lenses module drops between said short focus lens and the homogenizer.
A kind of method of adjustment of said laser illuminator, it may further comprise the steps:
The adjustment positive lens from homogenizer to negative lens near, the light angle of said laser illuminator is progressively dwindled; Otherwise the light angle of said laser illuminator progressively enlarges; Until confirming and the corresponding light filling scope of image pickup scope.
Described method, wherein, said short focus lens converges to laser beam on the homogenizer, and the hot spot on the homogenizer is less than 2.5mm * 2.5mm.
Described method, wherein, said positive lens and the combination of said negative lens form a combination of lenses module.
Described method, wherein, the focus of said combination of lenses module drops between said short focus lens and the homogenizer.
A kind of laser illuminator and the method for adjustment thereof that can adjust light angle on a large scale continuously provided by the present invention; Owing to adopted the design proposal of positive lens in negative lens the place ahead; Having overcome in the market, laser illuminator exists big low-angle to be difficult to take into account adjustment and the lower problem of utilization ratio of optical energy; And make the field angle of video camera and the light filling angle of luminaire to mate fully, and the light filling distance satisfies the camera distance of video camera on the market fully.
Description of drawings
Fig. 1 is the laser illuminator system synoptic diagram of prior art.
Fig. 2 is a laser illuminator system light path principle synoptic diagram of the present invention.
Fig. 3 and the synoptic diagram of lighting device of the present invention when adjusting different illumination zone that be respectively shown in Figure 4.
Fig. 5 is the optics position principle schematic of lighting device of the present invention.
Fig. 6 cuts open for the entity structure of lighting device of the present invention and shows synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing, will carry out more detailed explanation to each preferred embodiment of the present invention.
Laser illuminator in the market exists big low-angle to be difficult to take into account adjustment and the lower problem of utilization ratio of optical energy; And the present invention can effectively address the above problem; Make the field angle of video camera and the light filling angle of luminaire carry out coupling fully; And the light filling distance satisfies the camera distance of video camera on the market, the light filling adjustable angle of lighting device of the present invention simultaneously fully.
The present invention can adjust the laser illuminator preferred embodiment of light angle on a large scale continuously, and light path principle as shown in Figure 2 comprises a laser instrument 210 in the laser illuminator of the present invention, be used for launching laser; The laser of launching converges through a short focus lens 220, and before and after the focus of this weak point focus lens 220, a homogenizer 230 is set; Be provided with behind this homogenizer 230 that a positive lens 240 and a negative lens 250 form " just-negative " the structure lens combination, laser forms certain light filling scope through these two lens.Different with prior art is; Lighting device of the present invention is the place ahead that positive lens 240 is provided with negative lens 250; And positive lens 240 is set can move forward and backward; Thereby form the lighting device that can adjust rising angle, the adjustment of this rising angle can realize the adjustment of lighting device light filling scope of the present invention.
The complete light path of laser illuminator of the present invention is as shown in Figure 2 formed, and wherein A is a semiconductor laser; B is short focus lens, can include but not limited to it is plano-convex lens, biconvex lens, aspheric mirror and GRIN Lens etc.; C is a homogenizer, can adopt frosted glass etc.; D is a positive lens; E is a negative lens.
The laser beam of being sent by semiconductor laser A is behind short focus lens B, and laser beam is converged on the homogenizer C, and the spot size that will guarantee to converge on the C must be less than 2.5mm * 2.5mm, otherwise the effect of illumination and light filling is impracticable; Laser beam after homogenizer C homogenize is divergent state, collects and converges with the laser beam that positive lens D will disperse, and with negative lens the laser beam after converging through positive lens is collimated again.When positive lens is moved in front and back, can adjust the light angle of laser illuminator on a large scale continuously, and the light spot energy distribution is uniform all the time.
As shown in Figure 3 is lighting device of the present invention in the light filling scope signal of diverse location, is when moving forward and backward positive lens D (A, B, C, E are fixed), the synoptic diagram when making laser illuminator be in the low-angle illumination condition; Shown in Figure 4 is when moving forward and backward positive lens D (A, B, C, E are fixed), the synoptic diagram when making laser illuminator be in the wide-angle illumination condition.Visible by diagram, align, the negative lens parameter designs and relative position is adjusted, the light angle that can satisfy laser illuminator is theoretically spent to 90 degree from 0 and can be adjusted continuously.The movable fixture of said positive lens can adopt electronic moving structure or manual moving structure,
This does not do and gives unnecessary details.
In one preferred embodiment of lighting device of the present invention as shown in Figure 5; Wherein the laser that sends of semiconductor laser 210 after too short focus lens 220, formed focal zone before homogenizer 230; The spot size of this focal zone must be less than 2.5mm * 2.5mm; And with combination of lenses module of positive lens 240 and negative lens 250 assembling formation, with convenient for assembly, the focus of this combination of lenses is F; When said positive lens 240 being set when optical axis direction moves around, focal point F is also mobile between short focus lens 220 and homogenizer 230; When positive lens 240 to negative lens 250 near the time, focal point F also to homogenizer 230 near, the light angle of laser illuminator is progressively dwindled, and forms less light filling field of illumination as shown in Figure 3.When focal point F overlapped with homogenizer 230, emergent light will be by collimation, and this moment, the light angle of laser illuminator was minimum; If positive lens 240 also moves to short focus lens 220 directions near, focal point F to homogenizer 230 directions, then the light angle of laser illuminator according to the invention progressively enlarges, illumination light filling scope as shown in Figure 4.Confirm and the light filling scope of the corresponding size of image pickup scope that until final this adjustment process can be passed through manually, also can be through the procedure auto-control adjustment.
In the said lighting device of the present invention, light path is just adopting-the negative lens combination, and wherein positive lens has been accomplished the collection of laser and converged, and negative lens is accomplished the collimation or the wide-angle outgoing of laser.Compare with the light path that traditional negative-positive lens makes up, under the prerequisite of guaranteeing equal utilization ratio of laser energy, the lens sizes that the present invention adopts is less, so the volume of laser illuminator is less, helps large-scale application.Simultaneously, said positive lens is set to and can moves forward and backward, and has made things convenient for the adjustment to the light filling illumination zone.
Lighting device of the present invention can be realized through experiment showed, its principle of work.As shown in Figure 6; Said semiconductor laser 210, short focus lens 220, homogenizer 230, positive lens 240 and negative lens 250 are arranged in the shell 260 of a tubular; And the adjustment structure (not shown) of adjusting positive lens 240 can be set; Be used for adjusting within the specific limits said positive lens 240 front and back on optical axis and move, to adjust the light filling scope of whole laser illuminator.
The present invention provides a kind of method of laser lighting light filling scope adjustment simultaneously, adopts above-mentioned lighting device, has realized the adjustment to light filling and illumination zone through the front and back position relation of adjusting positive lens.
Should be understood that above-mentioned description to preferred embodiment of the present invention is comparatively concrete and detailed, 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 accompanying claims.
Claims (8)
1. the laser illuminator that can adjust light angle on a large scale continuously, its setting comprises that one is used to launch the laser instrument of laser, it is characterized in that, and, a short focus lens and a homogenizer that sets gradually; Said laser instrument, said short focus lens and said homogenizer are successively set on the same optical axis, and on this optical axis, also are disposed with a positive lens and a negative lens, and said positive lens can move forward and backward along said optical axis.
2. laser illuminator according to claim 1 is characterized in that, said short focus lens converges to laser beam on the homogenizer, and the hot spot on the homogenizer is less than 2.5mm * 2.5mm.
3. laser illuminator according to claim 1 is characterized in that, said positive lens and the combination of said negative lens form a combination of lenses module.
4. laser illuminator according to claim 3 is characterized in that, the focus of said combination of lenses module drops between said short focus lens and the homogenizer.
5. method of adjustment of laser illuminator according to claim 1, it may further comprise the steps:
The adjustment positive lens from homogenizer to negative lens near, the light angle of said laser illuminator is progressively dwindled; Otherwise the light angle of said laser illuminator progressively enlarges; Until confirming and the corresponding light filling scope of image pickup scope.
6. method according to claim 5 is characterized in that, said short focus lens converges to laser beam on the homogenizer, and the hot spot on the homogenizer is less than 2.5mm * 2.5mm.
7. method according to claim 5 is characterized in that, said positive lens and the combination of said negative lens form a combination of lenses module.
8. method according to claim 7 is characterized in that, the focus of said combination of lenses module drops between said short focus lens and the homogenizer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104236109A CN102495512A (en) | 2011-12-17 | 2011-12-17 | Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof |
| CN201220465908.6U CN202791803U (en) | 2011-12-17 | 2012-09-13 | Laser illumination apparatus capable of continuously adjusting illumination angle in large range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104236109A CN102495512A (en) | 2011-12-17 | 2011-12-17 | Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102495512A true CN102495512A (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104236109A Pending CN102495512A (en) | 2011-12-17 | 2011-12-17 | Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof |
| CN201220465908.6U Ceased CN202791803U (en) | 2011-12-17 | 2012-09-13 | Laser illumination apparatus capable of continuously adjusting illumination angle in large range |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220465908.6U Ceased CN202791803U (en) | 2011-12-17 | 2012-09-13 | Laser illumination apparatus capable of continuously adjusting illumination angle in large range |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135626A (en) * | 2014-07-31 | 2014-11-05 | 天津市亚安科技股份有限公司 | Device and method for automatically adjusting auxiliary lighting equipment |
| CN104762665A (en) * | 2015-03-27 | 2015-07-08 | 上海集成电路研发中心有限公司 | Laser processing device and system as well as wafer processing system |
| CN105589206A (en) * | 2016-03-25 | 2016-05-18 | 刘磊 | Laser supplementing device and illumination control method thereof |
| CN106195802A (en) * | 2016-09-03 | 2016-12-07 | 超视界激光科技（苏州）有限公司 | A kind of search lighting device |
| CN106796285A (en) * | 2014-12-22 | 2017-05-31 | 谷歌公司 | The luminaire of the camera system with moveable mirror element, for being caught with the three-dimensional flight time |
| CN108681086A (en) * | 2018-07-06 | 2018-10-19 | 温州大学激光与光电智能制造研究院 | Laser facula apparatus for shaping and its method |
| CN109151288A (en) * | 2018-10-30 | 2019-01-04 | 维沃移动通信（杭州）有限公司 | Light filling mould group and terminal device |
| CN114321820A (en) * | 2022-01-11 | 2022-04-12 | 荣仪尚科光电技术(哈尔滨)有限公司 | Natural light homogenization lighting device and method based on double-lens negative-positive combination |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104135626A (en) * | 2014-07-31 | 2014-11-05 | 天津市亚安科技股份有限公司 | Device and method for automatically adjusting auxiliary lighting equipment |
| CN106796285A (en) * | 2014-12-22 | 2017-05-31 | 谷歌公司 | The luminaire of the camera system with moveable mirror element, for being caught with the three-dimensional flight time |
| US10306209B2 (en) | 2014-12-22 | 2019-05-28 | Google Llc | Illuminator for camera system having three dimensional time-of-flight capture with movable mirror element |
| CN104762665A (en) * | 2015-03-27 | 2015-07-08 | 上海集成电路研发中心有限公司 | Laser processing device and system as well as wafer processing system |
| CN105589206A (en) * | 2016-03-25 | 2016-05-18 | 刘磊 | Laser supplementing device and illumination control method thereof |
| CN106195802A (en) * | 2016-09-03 | 2016-12-07 | 超视界激光科技（苏州）有限公司 | A kind of search lighting device |
| CN108681086A (en) * | 2018-07-06 | 2018-10-19 | 温州大学激光与光电智能制造研究院 | Laser facula apparatus for shaping and its method |
| CN109151288A (en) * | 2018-10-30 | 2019-01-04 | 维沃移动通信（杭州）有限公司 | Light filling mould group and terminal device |
| CN109151288B (en) * | 2018-10-30 | 2021-01-08 | 维沃移动通信（杭州）有限公司 | Light filling module and terminal equipment |
| CN114321820A (en) * | 2022-01-11 | 2022-04-12 | 荣仪尚科光电技术(哈尔滨)有限公司 | Natural light homogenization lighting device and method based on double-lens negative-positive combination |
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| CN202791803U (en) | 2013-03-13 |
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Application publication date: 20120613 |