CN205334024U

CN205334024U - But infrared laser light filling device of continuously adjustable illumination angle

Info

Publication number: CN205334024U
Application number: CN201620235883.9U
Authority: CN
Inventors: 陆知纬
Original assignee: SHENZHEN JIDADE TECHNOLOGY Co Ltd
Current assignee: SHENZHEN JIDADE TECHNOLOGY Co Ltd
Priority date: 2016-03-25
Filing date: 2016-03-25
Publication date: 2016-06-22
Anticipated expiration: 2026-03-25

Abstract

The utility model discloses a but infrared laser light filling device of continuously adjustable illumination angle, the device includes: the laser instrument, short burnt focusing lens, the setting is in it is right that short burnt focusing lens the place ahead is used for the laser beam of short burnt focusing lens focus carries out the homogenizing piece of homogenizing, and set up the positive lens or the positive lens group in homogenizing piece the place ahead, laser instrument, short burnt focusing lens, homogenizing piece, and positive lens or positive lens group set gradually on same optical axis, just positive lens or positive lens group follow but optical axis back -and -forth movement. The utility model discloses a semiconductor laser is as the light emitting source, and is with low costs, and the efficiency of light energy utilization is high, and the utility model discloses pass through the focus of positive lens or positive lens group at optical design and can make the illumination angle littleer, be favorable to improving the effect of remote light filling, but simultaneously through positive lens or the back -and -forth movement continuously adjustable of positive lens group illumination angle, satisfy the light filling demand of camera basically.

Description

A kind of iraser light compensating apparatus of continuously adjustable lighting angle

Technical field

This utility model relates to iraser light filling at night technical field, in particular the iraser light compensating apparatus of a kind of continuously adjustable lighting angle。

Background technology

Night camera technology, for instance night monitoring, generally adopts infrared sensitive technology, but owing to the infrared ray of the transmitting of monitored object self is faint, sensor photosensitive sensitivity does not also reach requirement, and therefore prior art also needs to infrared illumination；Infrared illumination includes infrared diode light filling and iraser light filling, and due to the high power of laser, the technology of iraser light filling is more and more general, and the requirement of lighting quality is also more and more higher。

The iraser light compensation method adopted in the market has problems with:

1, when using semiconductor laser as luminous source, owing to optical design is unreasonable, cause that the efficiency of light energy utilization of light compensating apparatus is low；

2, owing to laser light compensating apparatus is used for the light filling of bigger monitoring range, prior art cannot take into account big low-angle irradiation, and the luminous energy on especially remote light projection surface affects image effect not。

3, existing zoom design excessively complexity or lens numbers are too much, high cost。

Therefore, prior art has yet to be improved and developed。

Utility model content

The technical problems to be solved in the utility model is in that, for the drawbacks described above of prior art, it is provided that the iraser light compensating apparatus of a kind of continuously adjustable lighting angle；Achieve efficiency of light energy utilization height, lighting angle continuously adjustable, and remote light filling effect is more preferably。

The technical scheme that this utility model solution technical problem adopts is as follows:

A kind of iraser light compensating apparatus of continuously adjustable lighting angle, its setting includes one for launching the laser instrument of laser, it is characterised in that also include:

It is arranged on the short burnt condenser lens being focused for the laser beam that described laser instrument is sent in described laser instrument front；

It is arranged on described short burnt condenser lens front to carry out homogenized homogenizing sheet for the laser beam that described short burnt condenser lens is focused on；

And described in being arranged on, homogenize plus lens or the positive lens groups in sheet front；

Described laser instrument, short burnt condenser lens, homogenize sheet and described plus lens or positive lens groups is successively set on same optical axis, and described plus lens or positive lens groups can move forward and backward along described optical axis。

It is preferred that described laser instrument is semiconductor laser。

It is preferred that described semiconductor laser is the laser instrument that single-chip is luminous, the laser optical power of described single-chip luminescence ranges for 2-20 watt。

It is preferred that described short burnt condenser lens is planoconvex lens, biconvex lens, aspherical mirror or GRIN Lens。

It is preferred that described in homogenize sheet be clouded glass, microlens array or fly's-eye lens, it is preferred to clouded glass。

It is preferred that described in homogenize sheet be placed through motor drive and carry out periodic rotary。

It is preferred that described in homogenize sheet and be placed in described short burnt condenser lens and focus on convergence place of laser beam, and laser beam at the described spot size converged on sheet that homogenizes less than 2.5mm × 2.5mm。

It is preferred that described plus lens includes planoconvex lens, biconvex lens, meniscus, aspherical mirror or GRIN Lens；

It is preferred that described positive lens groups is the combination of at least two in planoconvex lens, biconvex lens, meniscus, non-spherical lens, GRIN Lens；Preferably, described positive lens groups includes meniscus and biconvex lens。

Beneficial effect: the iraser light compensating apparatus of a kind of continuously adjustable lighting angle provided by the utility model, compared to prior art, this utility model have employed the method for innovation, lighting angle can be made in optical design less by plus lens or positive lens groups focusing, be conducive to improving the effect of remote light filling, simultaneously by the movable continuously adjustable lighting angle of plus lens or positive lens groups, substantially meet the light filling demand of video camera。

Accompanying drawing explanation

Fig. 1 be a kind of continuously adjustable lighting angle of this utility model iraser light compensating apparatus in the first preferred embodiment light path composition schematic diagram。

Fig. 2 be a kind of continuously adjustable lighting angle of this utility model iraser light compensating apparatus in the second preferred embodiment light path composition schematic diagram。

The light path schematic diagram of collimating status when Fig. 3 is the remote angle outgoing of the low-angle of the iraser light compensating apparatus of this utility model a kind of continuously adjustable lighting angle。

The light path schematic diagram of divergent state when Fig. 4 is the nearly angle outgoing of the wide-angle of the iraser light compensating apparatus of this utility model a kind of continuously adjustable lighting angle。

Fig. 5 is the optics position view of the iraser light compensating apparatus of a kind of continuously adjustable lighting angle of this utility model。

Detailed description of the invention

For making the purpose of this utility model, technical scheme and advantage clearly, clearly, develop simultaneously embodiment to this utility model further description referring to accompanying drawing。Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model。

In night camera technical field, generally adopt infrared sensitive technology, but owing to the infrared ray of the transmitting of monitored object self is faint, sensor photosensitive sensitivity does not also reach requirement, also needs iraser light filling。For the iraser light compensating apparatus of a kind of continuously adjustable lighting angle of this offer of the present utility model, shown in Figure 1, wherein A is laser instrument, it is preferred to semiconductor laser, including laser diode, with optical fiber output laser diode etc., be used for launching laser。Further, described semiconductor laser is the laser instrument that single-chip is luminous, and the laser optical power of described single-chip luminescence ranges for 2-20 watt。When this utility model is embodied as, described laser instrument A launches iraser, for video camera night camera light filling。

Shown in Fig. 1, B is the short burnt condenser lens being focused by the laser beam that laser instrument A sends, it is arranged at described laser instrument A front, and described short burnt condenser lens can, for have planoconvex lens, biconvex lens, aspherical mirror or GRIN Lens that laser is focused, be used for being focused the iraser laser beam of semiconductor laser。C be arranged on described short burnt condenser lens front homogenize sheet, clouded glass it is preferably when being embodied as, but can also be laser light is done up segmentation homogenization microlens array or fly's-eye lens etc., for the described short burnt condenser lens B laser beam focused on is carried out Homogenization Treatments。

Shown in Fig. 1 and Fig. 2, in this utility model iraser light compensating apparatus D be arranged on described in homogenize plus lens or the positive lens groups in sheet C front。Plus lens shown in Fig. 1 can for have the planoconvex lens of focussing force, biconvex lens, meniscus, aspherical mirror or GRIN Lens etc.；Positive lens groups shown in Fig. 2 is the combination of at least two in planoconvex lens, biconvex lens, meniscus, non-spherical lens, GRIN Lens。When this utility model is embodied as, it is preferable that described positive lens groups includes meniscus and biconvex lens。

In this utility model iraser light compensating apparatus, a short burnt condenser lens B was set before homogenizing sheet C, makes excitation beam converge in and homogenize sheet C, and homogenize by homogenizing sheet C scattering。The setting of this short burnt condenser lens B makes the utilization rate of luminous energy higher。Additionally, the position homogenizing sheet C focuses on convergence place of laser beam at described short burnt condenser lens。

As shown in Figure 3 or Figure 4。The laser beam sent by semiconductor laser A is after short burnt condenser lens B, laser beam converges to and homogenizes above sheet C and scattering homogenizes, and control laser beam further at the described spot size converged on sheet that homogenizes less than 2.5mm × 2.5mm, so homogenize the hot spot above sheet C and be considered as new light source, hot spot is more little, is more conducive to laser to irradiate more uniformly and abatement edge-light burr。

Further, when being embodied as, described laser instrument A, short burnt condenser lens B, sheet C and plus lens are homogenized or positive lens groups D is successively set on same optical axis。This utility model iraser light compensating apparatus is for adopting the night camera equipment of infrared sensitive imaging。

Further, plus lens or positive lens groups D described in this utility model iraser light compensating apparatus can realize moving forward and backward on the described optical axis in laser conduction direction, concrete can be that micromotor (not marking in figure) is connected described plus lens or positive lens groups D by structural member, rotated by motor output shaft drive plus lens or positive lens groups D away from or near described in homogenize sheet C；So that light compensating apparatus continuously adjustable lighting angle。

Such as, as it is shown on figure 3, by described plus lens or positive lens groups D away from homogenizing sheet C end, laser is in low-angle (remote angle) outgoing state；Remote angle illuminates, and is adapted to remote light filling。Example is as shown in Figure 4 again, homogenizes sheet C end by close to described plus lens or positive lens groups D, and device is in wide-angle (nearly angle) outgoing state；Nearly angle illuminates, and is adapted to closely light filling。

Further, shown in Figure 5, for the optics position view of the iraser light compensating apparatus of this utility model continuously adjustable lighting angle, in figure, S is laser instrument A position；L1 is short burnt condenser lens B place, and its focal length is f1；G homogenizes sheet C position, and L2 is plus lens or positive lens groups D position, and its focal length is f2。Wherein, S-L1 represents the laser instrument A distance to short burnt condenser lens B；L1-G represents short burnt condenser lens B and the distance homogenized between sheet C；L2-G represents plus lens or positive lens groups D and the distance homogenized between sheet C。

When this utility model is embodied as,

When the condition of satisfying condition:, andTime,

Now, laser beam is converged in and homogenizes above sheet C by short burnt condenser lens B, and is collimated output by plus lens or positive lens groups D, produces the illumination of remote angle。If continuing to move to plus lens or positive lens groups D making it in time homogenizing sheet C, lighting angle progressively expands, thus producing the effect of nearly angle illumination。Thus, according to reality, plus lens or positive lens groups D, the relative parameter that homogenizes sheet C and short burnt condenser lens B can be designed, the light filling requirement of video camera can be substantially met in theory, simultaneously all optics close together, therefore luminous energy loss is relatively low。

In another embodiment of this utility model, can be arranged in iraser light compensating apparatus of the present utility model by a micromachine, homogenize sheet C by micromachine driving and carry out periodic rotary, substantially eliminate laser speckle, the brightness making any light filling region becomes uniform, solves the not fogging clear defect that laser speckle causes。

The iraser light compensating apparatus of continuously adjustable lighting angle provided by the utility model, compared to prior art, adopt semiconductor laser as luminous source, cost is low, the efficiency of light energy utilization is high, and this utility model can make lighting angle less in optical design by plus lens or positive lens groups focusing, is conducive to improving the effect of remote light filling, simultaneously by the movable continuously adjustable lighting angle of plus lens or positive lens groups, substantially meet the light filling demand of video camera。

Should be understood that; application of the present utility model is not limited to above-mentioned citing; for those of ordinary skills, it is possible to improved according to the above description or convert, all these improve and convert the protection domain that all should belong to this utility model claims。

Claims

1. an iraser light compensating apparatus for continuously adjustable lighting angle, its setting includes one for launching the laser instrument of laser, it is characterised in that also include:

2. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterised in that described laser instrument is semiconductor laser。

3. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 2, it is characterised in that described semiconductor laser is the laser instrument that single-chip is luminous, the luminous laser optical power of described single-chip ranges for 2-20 watt。

4. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterised in that described short burnt condenser lens is planoconvex lens, biconvex lens, aspherical mirror or GRIN Lens。

5. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterised in that described in homogenize sheet be clouded glass, microlens array or fly's-eye lens。

6. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterised in that described in homogenize sheet and be placed through motor and drive and carry out periodic rotary。

7. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterized in that, the described sheet that homogenizes is placed in described short burnt condenser lens and focuses on convergence place of laser beam, and laser beam at the described spot size converged on sheet that homogenizes less than 2.5mm × 2.5mm。

8. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterized in that, when homogenizing sheet front described in being arranged on and being plus lens, described plus lens includes planoconvex lens, biconvex lens, meniscus, aspherical mirror or GRIN Lens。

9. the iraser light compensating apparatus of continuously adjustable lighting angle according to claim 1, it is characterized in that, when homogenizing sheet front described in being arranged on and being positive lens groups, described positive lens groups is the combination of at least two in planoconvex lens, biconvex lens, meniscus, non-spherical lens, GRIN Lens。