CN103365033B - A kind of lighting device and comprise the video camera of this lighting device - Google Patents
A kind of lighting device and comprise the video camera of this lighting device Download PDFInfo
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- CN103365033B CN103365033B CN201210099527.5A CN201210099527A CN103365033B CN 103365033 B CN103365033 B CN 103365033B CN 201210099527 A CN201210099527 A CN 201210099527A CN 103365033 B CN103365033 B CN 103365033B
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- lens
- lighting device
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- light source
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Abstract
The present invention is applicable to camera technique field, provide a kind of lighting device and comprise the video camera of this lighting device, lighting device comprises visible light source, the emitting light path of described visible light source is provided with lens combination, on the same line, described lens combination comprises at least a slice can along the lens of described central shaft movement for the central shaft of described lens combination and the central shaft of described visible light source.The present invention arranges lens combination in lighting device, a slice lens are had at least centrally to move forward and backward by axle in this lens combination, make the distance between lens and visible light source adjustable, and then make the emergence angle size of light beam after lens combination adjustable, when this lighting device is used for video camera, the angle of emergent light and the visual angle of video camera can being matched by adjusting the position of respective lens, avoiding emergence angle relatively excessive or too smallly cause the problem that photographic effect is not good and light utilization is low.
Description
Technical field
The invention belongs to field of photography, particularly relate to a kind of lighting device and comprise the video camera of this lighting device.
Background technology
Video camera a kind ofly gathers subject dynamically or the equipment of still image information, can be used for the multiple fields such as security protection, traffic, art, daily shooting, video camera is typically provided with illuminator, for sending illumination light to subject, the imaging device of this illumination light camera being shot after subject reflection catches, optical information is converted to electric signal, after corresponding data processing, forms the image of subject.The light source that existing video camera uses has fixing light emergence angle more, and after video camera dispatches from the factory, its light angle is also fixed thereupon, and when the visual angle of the taking lens of video camera is identical with this light angle, illuminating ray is fully utilized just.But, when in order to take distant objects the visual angle of video camera 11 is turned down time, the emergence angle of light source 12 is just no longer mated with visual angle, the emergence angle of illumination light is relatively excessive, a lot of light does not have value, is unfavorable for energy-conservation, as Fig. 1 a, 1b, field of illumination 13 wherein in Fig. 1 b is much larger than region 14 being shot, and edge major part light is wasted.When in order to take near objects the visual angle of video camera 11 is tuned up time, the emergence angle of light source 12 is relatively too small again, the phenomenon that in the middle of occurring in region being shot, brighter, edge is darker among a small circle, picture quality is poor, as Fig. 2 a, 2b, field of illumination 13 wherein in Fig. 2 b is less than region 14 being shot, and Crape ring appears in edge, region 14 being shot.Therefore, the adjustability of existing video camera illuminator is poor, and photographic effect is undesirable.Such as, in traffic safety monitoring field, usually several video cameras are set in intersection, monitoring track is responsible for by each video camera, just match with the width in corresponding track at the illumination width of corresponding guarded region to make the illumination light of each video camera, can during fabrication according to the illuminator of actual application environment design video camera, but the traffic environment in each city is different, the distance in video camera and region being shot and the width in region being shot different, the video camera of applicable urban transportation monitoring is made not necessarily to adapt to other cities, so just cause the market of this video camera less, to be suitable for multiple area, also need to design different video cameras according to different regional road conditions, and the difference of different video cameras is only the angle of illumination light, be unfavorable for so very much simplifying procedure for producing, undesirably increase cost.
Summary of the invention
The object of the present invention is to provide a kind of lighting device, be intended to solve the problem that existing video camera causes because light angle is non-adjustable that photographic effect is poor, the efficiency of light energy utilization is low and is unfavorable for volume production.
The present invention realizes like this, a kind of lighting device, comprise visible light source, the emitting light path of described visible light source is provided with lens combination, on the same line, described lens combination comprises at least a slice can along the lens of described central shaft movement for the central shaft of described lens combination and the central shaft of described visible light source.
Another object of the present invention is to provide a kind of video camera, comprise the light projector device launching illumination light to region being shot and the light receiving described regional reflex being shot to form the imaging device of image, described light projector device adopts above-mentioned lighting device.
Lens in lighting device of the present invention can centrally move forward and backward by axle, the distance between lens and visible light source can be changed, and then change the emergence angle of light beam after lens combination, when this lighting device is used for video camera, the angle of emergent light and the visual angle of video camera can being matched by adjusting the position of lens, avoiding emergence angle relatively excessive or too smallly cause the problem that photographic effect is not good and the efficiency of light energy utilization is low; Further, because this light angle is adjustable, also make the range of application of video camera wider, saved production cost.
Accompanying drawing explanation
Fig. 1 a is the principle of work () of video camera in prior art;
Fig. 1 b is the illumination spot figure () of video camera in prior art;
Fig. 2 a is the principle of work (two) of video camera in prior art;
Fig. 2 b is the illumination spot figure (two) of video camera in prior art;
Fig. 3 is the structural representation () of embodiment of the present invention lighting device;
Fig. 4 is the principle of work () of lens combination in embodiment of the present invention lighting device;
Fig. 5 is the principle of work (two) of lens combination in embodiment of the present invention lighting device;
Fig. 6 is the structural representation (two) of embodiment of the present invention lighting device;
Fig. 7 is the structural representation of visible light source in embodiment of the present invention lighting device;
Fig. 8 is the structural representation of embodiment of the present invention video camera.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 3 shows the structural representation of the lighting device that the embodiment of the present invention provides, this lighting device comprises visible light source 31, the emitting light path of visible light source 31 is provided with lens combination 32, this lens combination 32 is made up of several lens, the central shaft of several lens is preferably on same straight line, the central shaft i.e. central shaft 30 of this lens combination of several lens, simultaneously, the central shaft of visible light source 31 and the central shaft 30 of lens combination 32 are also on the same line, according to the transmission principle of light, visible light source 31 and coaxial setting of lens combination 32 can ensure best light-out effect.In order to make the emergent light adjustable angle of this lighting device, a slice lens are had at least centrally to move forward and backward by axle 30 in this lens combination 32, namely the distance and between visible light source 31 is adjustable, and then make the emergence angle size of light beam after lens combination 32 adjustable, when this lighting device is used for video camera, the angle of emergent light and the visual angle of video camera can being matched by adjusting the position of respective lens, avoiding emergence angle relatively excessive or too smallly cause the problem that photographic effect is not good and light utilization is low.
With reference to accompanying drawing 4,5, this lens combination 32 specifically can comprise the moveable lens of a slice, i.e. the first lens 321, as Fig. 4, when the visual angle of video camera diminishes, the first lens 321 dorsad visible light source 31 centrally axle 30 move forward, the distance between the first lens 321 and visible light source 31 is increased, light emergence angle diminishes, and then matches with the visual angle of video camera; As Fig. 5, when the visual angle of video camera becomes large, the first lens 321 move towards visible light source 31, and the distance between the first lens 321 and visible light source 31 is reduced, and light emergence angle increases, and then matches with the visual angle of video camera.Suitably adjust the position of the first lens 321 like this according to the visual angle of video camera, just the angle of divergence of real-time ensuring illumination light and the visual angle of video camera can match, ensure preferably photographic effect and the higher efficiency of light energy utilization.
Further combined with accompanying drawing 3, in the present embodiment, can also comprise can the second lens 322 of centrally axle 30 movement for lens combination 31, certainly, second lens 322 and the coaxial setting of the first lens 321, when needs regulate light angle, can regulate the position of the first lens 321 and the second lens 322 simultaneously.Adopt two panels lens to coordinate and regulate light path, the range of adjustment that can make light emergence angle is larger and degree of regulation is higher, ensure that illumination light can adapt to shooting in a big way on the one hand, ensure on the other hand when finely tuning camera angle, the angle of illumination light also can be finely tuned with visual angle, ensure under any camera angle, the angle of illumination light all can match, and improves pickup quality further.
Further combined with accompanying drawing 3, in the present embodiment, in order to ensure good illuminating effect, lens combination 32 also comprises the 3rd lens 323, 3rd lens 323 are fixedly installed between moveable lens and visible light source 31, 3rd lens 323 are preferably convex lens, as elementary light path adjustment lens, first step adjustment is carried out to the light that visible light source 31 sends, because the light that visible light source 31 sends comparatively is dispersed, and directivity is bad, if directly through moveable lens, marginal ray possibly cannot be irradiated on moveable lens, most of light can be wasted, therefore be necessary to arrange the 3rd lens 323 near visible light source, light is made to be contained in low-angle, illumination intensity is caused to reduce to avoid waste light, also be convenient to follow-up optical path adjusting simultaneously.Certainly, can also how moveable lens be set according to actual needs, more high-precision adjustment is carried out to light emergence angle.
One as the present embodiment is improved, and can also increase by a catoptron group 33 on the emitting light path of moveable lens, to be coordinated and regulates, adjust, make the adjustability of illumination light better to the emergence angle of light beam by this catoptron group 33 with lens combination 32.Concrete with reference to accompanying drawing 6, this catoptron group 33 can comprise the concave mirror 332 of a convex mirror 331 and an annular, wherein, the central shaft of convex mirror 331 and concave mirror 332 and the central shaft 30 of lens combination are on the same line, concave mirror 332 is positioned on the reflected light path of convex mirror 331, convex mirror 331 is for reflecting the emergent light of lens combination 32, and concave mirror 332 is for reflecting other components or direct trend of purchasing region being shot of investing concave mirror 332 front after the light come carries out secondary reflection again to convex mirror 331.This convex mirror 331 can move forward and backward along central shaft 30, and then can change arbitrarily the reflection angle of light after convex mirror 331 and concave mirror 332, changes the shooting angle of illumination light.Catoptron group 33 is adopted to coordinate with lens combination 32 angle regulating illumination light, not only further can improve the precision of illumination light angular adjustment, the overall width of illuminating bundle can also be expanded by catoptron group 33, the further dirigibility improving light angle and regulate, makes it to adapt to more kinds of photographing request.
The regulating effect of the emergent light that the 32 pairs of pointolites of the lens combination in this lighting device produce is better, to area source, then effect is slightly poor, therefore the visible light source 31 preferred point light source in the present embodiment, in order to adapt to the environment for use of high brightness requirement, as traffic safety monitoring, this visible light source 31 is preferably single powerful white light source.Traditional most of traffic monitoring cameras all adopts by the integrated area source of multiple low-power LED, not only be not easy to adjustment outgoing optic angle, also because its area is larger, cause the area of reverberator and housing also larger, make the volume and weight of whole video camera all very large, inconvenience is installed, and its weight is arranged on eminence greatly again, certainly exists potential safety hazard.The present embodiment adopts a kind of power to be greater than single the white LED light source of 30W (being specially 35W), adopt this white LED light source as the visible light source of lighting device, said lens group 32 can well be adapted on the one hand, on the other hand, the brightness of its emergent light can meet the brightness requirement of urban transportation monitoring, the image photographing vehicle and driver that can be perfectly clear.Due to the requirement adopting single light source can meet traffic monitoring, the volume and weight of video camera is significantly reduced, solve the problem of traditional cameras inconvenience installation and eliminate potential safety hazard.
Further; the luminescence chip 312 that this white LED light source mainly comprises a substrate 311 and is arranged on substrate 311; as shown in Figure 7; the outside of luminescence chip 312 is coated with packing colloid 313; be not affected by the external environment for the protection of luminescence chip 312, preliminary adjustment carried out to the emergent ray of chip 312 simultaneously.In order to prevent white LED light source from making moist, can around luminescence chip 312 making one annular groove 314, to prevent water vapour from entering in packing colloid 313, prevent luminescence chip 312 to lose efficacy.
In the present embodiment, can the lens (the first lens 321 and the second lens 322 described above) of centrally axle movement can be Fresnel Lenses.Fresnel Lenses has the function of convex lens, and its Thickness Ratio convex lens are much thin simultaneously, and weight can significantly alleviate, and make the volume of this lighting device less, weight is lighter.
With reference to accompanying drawing 3,6, in the present embodiment, this lighting device can further include a shell 34, for encapsulating the components such as visible light source 31, lens combination 32, catoptron group 33, the shape of this shell can match with the profile of lens combination 32, catoptron group 33, also can not be mated, it is inner that lens combination 32 and catoptron group 33 can be fixed on shell 34 by corresponding fixture.In order to save space and good looking appearance, the central shaft of the central shaft 30 of lens combination 32 and catoptron group 33 and shell can be made on the same line.Further, sealing lens 35 can also be set at the light-emitting window place of this shell 34, as the outermost layer optical element of this lighting device, illumination light directly invests region being shot through these sealing lens 35, these sealing lens 35 can be level crossings, also can be convex lens, specifically can determine according to practical application.
In the present embodiment, can the position of the centrally lens of axle movement can be regulated by corresponding regulating device, specifically can adopt existing various ways, one annular rotating external member is such as set on shell, moveable lens are connected with this external member, this external member is connected with outside drive motor, this external member is driven to rotate by drive motor, and then drive lens moves forward and backward, also drive link can be directly adopted to be connected with moveable lens, then drive drive link to move forward and backward by drive motor, and then drive lens move.Actual can the work of Non-follow control drive motor or stopping when using, and then control lens and move, the distance of movement can be determined according to the size of camera angle, is as the criterion so that the angle of divergence of mobile back lighting light is consistent with camera angle.Certainly can also adopt other move modes, specifically can select according to actual needs to make mode that is simple, convenient operation, no longer describe in detail herein.
Above-mentioned lighting device is mainly applicable to video camera, the present invention further provides a kind of video camera, with reference to accompanying drawing 8, this video camera comprises the light projector device 81 launching illumination light to region being shot and the light receiving regional reflex being shot to form the imaging device 82 of image, namely this light projector device 81 adopts lighting device provided by the invention, imaging device 82 is positioned at surrounding or the front of lighting device 81, and its particular location is so that the reflected light receiving subject is as the criterion.
Preferably, the central shaft of the central shaft of the camera lens 821 of imaging device 82 and the lens combination of lighting device 81 on the same line, concrete, imaging device 82 can be encapsulated in the enclosure of lighting device 81, before being positioned at the lens combination of lighting device 81, so both can ensure the reflected light receiving subject accurately, effectively can utilize space again, reduce the volume of video camera, imaging device 82 can also be prevented to be affected by the external environment, and profile better appearance.
The present invention arranges moveable lens in lighting device, light emergence angle is changed by the distance changed between lens and visible light source, the emergence angle of illumination light can be changed in real time with camera angle, and then ensure the higher efficiency of light energy utilization and preferably pickup quality, this video camera can be used for the fields such as security protection, art, daily shooting, is particularly suitable for night traffic safety monitoring.Due to the adjustable angle of its illumination light, when using in different regions, only light angle need be regulated to install and use according to environment for use, different video cameras need not be manufactured according to different environment for use again, advantageously in batch production, and cost-saving.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a lighting device, it is characterized in that, comprise visible light source, the emitting light path of described visible light source is provided with lens combination, on the same line, described lens combination comprises at least a slice can along the lens of described central shaft movement for the central shaft of described lens combination and the central shaft of described visible light source; Described lens combination comprises and along the first lens of described central shaft movement and the second lens, and can be fixedly installed on the 3rd lens between described visible light source and the first lens, makes light be contained in low-angle; Described lighting device also comprises the catoptron group on the emitting light path being arranged at described lens combination, described catoptron group comprise one with the convex mirror of the coaxial setting of described lens combination and a loop concave mirror, described loop concave mirror is arranged on the reflected light path of described convex mirror, and described convex mirror can move along the central shaft of described lens combination.
2. lighting device as claimed in claim 1, it is characterized in that, described visible light source is the white LED light source that a power is greater than 30W.
3. lighting device as claimed in claim 1, is characterized in that, described can the lens of centrally axle movement be Fresnel Lenses.
4. the lighting device as described in any one of claims 1 to 3, is characterized in that, also comprise for drive described can the movable regulating device of the lens of centrally axle movement.
5. a video camera, is characterized in that, comprises the light projector device launching illumination light to region being shot and the light receiving described regional reflex being shot to form the imaging device of image, and described light projector device adopts the lighting device described in any one of Claims 1-4.
6. video camera as claimed in claim 5, it is characterized in that, the central shaft of the central shaft of described imaging device and the lens combination of described lighting device on the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210099527.5A CN103365033B (en) | 2012-04-06 | 2012-04-06 | A kind of lighting device and comprise the video camera of this lighting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210099527.5A CN103365033B (en) | 2012-04-06 | 2012-04-06 | A kind of lighting device and comprise the video camera of this lighting device |
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| Publication Number | Publication Date |
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| CN103365033A CN103365033A (en) | 2013-10-23 |
| CN103365033B true CN103365033B (en) | 2016-03-30 |
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| CN201210099527.5A Expired - Fee Related CN103365033B (en) | 2012-04-06 | 2012-04-06 | A kind of lighting device and comprise the video camera of this lighting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11022275B2 (en) | 2019-03-18 | 2021-06-01 | Chi-Yuen Chau | Optical device and illumination device |
| CN111174180B (en) * | 2020-01-19 | 2022-04-26 | 平行现实（杭州）科技有限公司 | Large dynamic range light beam steering device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04350632A (en) * | 1991-05-28 | 1992-12-04 | Asahi Optical Co Ltd | Stroboscopic device |
| CN1916485A (en) * | 2005-08-16 | 2007-02-21 | 株式会社东芝 | Illuminator, led illuminator, and imaging device with illuminator |
| CN202583663U (en) * | 2012-04-06 | 2012-12-05 | 弘凯光电(深圳)有限公司 | Lighting device and camera having same |
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2012
- 2012-04-06 CN CN201210099527.5A patent/CN103365033B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04350632A (en) * | 1991-05-28 | 1992-12-04 | Asahi Optical Co Ltd | Stroboscopic device |
| CN1916485A (en) * | 2005-08-16 | 2007-02-21 | 株式会社东芝 | Illuminator, led illuminator, and imaging device with illuminator |
| CN202583663U (en) * | 2012-04-06 | 2012-12-05 | 弘凯光电(深圳)有限公司 | Lighting device and camera having same |
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| CN103365033A (en) | 2013-10-23 |
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