CN204733247U - A kind of video camera - Google Patents
A kind of video camera Download PDFInfo
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- CN204733247U CN204733247U CN201520407566.6U CN201520407566U CN204733247U CN 204733247 U CN204733247 U CN 204733247U CN 201520407566 U CN201520407566 U CN 201520407566U CN 204733247 U CN204733247 U CN 204733247U
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- video camera
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- light compensating
- camera lens
- compensating lamp
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Abstract
The utility model provides a kind of video camera, comprising: shell, arranges camera lens in the housing, and is arranged on the sidepiece of described camera lens and the light compensating lamp of centre wavelength between 950-1100 nanometer.This video camera exposes to the sun without red substantially when night uses, and image effect is clear, and it is simple, convenient to use.
Description
Technical field
The utility model relates to camcorder technology field, the video camera that particularly a kind of red phenomenon of exposing to the sun is less.
Background technology
Video camera is that one changes the signal of telecommunication into optical image signal, and the equipment of storage or transmission of electric signals.
Video camera comprises shell and is separately positioned on camera lens, imageing sensor and the light compensating lamp in shell.Wherein, light compensating lamp is arranged on the sidepiece of camera lens, and imageing sensor is near the inner of camera lens and be electrically connected with camera lens.When taking, by light compensating lamp irradiating object, and catching object and imaging by camera lens, then being operated further by imageing sensor.
The centre wavelength of existing light compensating lamp is usually in 940 nanometers.But, by the restriction of the Light-Emitting Diode characteristic in light compensating lamp, send beyond infrared light (light that human eye cannot be seen) at light compensating lamp, also can the visible ruddiness of issued section human eye.That is, light compensating lamp there will be red phenomenon of exposing to the sun.Like this, by camera application in such as Along Railway, if light compensating lamp night occur red expose to the sun phenomenon time, easily make the red light of attendant and traffic lights obscure, thus cause a series of safety problem.
At present, a kind of method reducing red phenomenon of exposing to the sun is, as shown in Figure 1, wavelength photoreceptor when promoting by making the quantum efficiency of imageing sensor is in 850 nanometers.Like this, when wavelength photoreceptor is in 940 nanometer, quantum efficiency can decline to some extent.That is, the seizure image effect by reducing camera lens reduces red phenomenon of exposing to the sun.But arrange by the way, red phenomenon of exposing to the sun is still comparatively obvious.
Therefore, how solving the red phenomenon comparatively significantly problem of exposing to the sun of existing video camera, is those skilled in the art's technical issues that need to address.
Utility model content
The utility model provides a kind of video camera, can effectively reduce red phenomenon of exposing to the sun by the centre wavelength changing light compensating lamp.
Video camera of the present utility model comprises: shell, arranges camera lens in the housing, and is arranged on the sidepiece of described camera lens and the light compensating lamp of centre wavelength between 950-1100 nanometer.
In one embodiment, at least two light compensating lamps are circumferentially with along described camera lens.
In one embodiment, also comprise and being sticked at the exiting surface of described light compensating lamp and the filter for filtering the light of wavelength below 900 nanometers.
In one embodiment, described filter is the unimodal coated filter simultaneously filtering the light of wavelength more than 1150 nanometers.
In one embodiment, described filter is configured to protrude from described camera lens.
In one embodiment, also comprise to be electrically connected with described camera lens and quantum efficiency promotes time wavelength photoreceptor value differ with the value of described centre wavelength the imageing sensor being no more than 6 nanometers.
In one embodiment, described imageing sensor is the imageing sensor that quantum efficiency is promoted to 25-30%.
Relative to prior art, the centre wavelength of the light compensating lamp in the utility model is between 950-1100 nanometer.When the centre wavelength of light compensating lamp is in 950-1100 nanometer, center wave band can offset to long-wave band.Like this, the red phenomenon of exposing to the sun of light compensating lamp can effectively be reduced.And the image effect of this video camera is better.
Accompanying drawing explanation
Also will be described in more detail the utility model with reference to accompanying drawing based on embodiment hereinafter.
Fig. 1 is the quantum efficiency of imageing sensor of the prior art and the graph of a relation of wavelength photoreceptor.
Fig. 2 is the structural representation of video camera.
What Fig. 3 was the centre wavelength of light compensating lamp when being 980 nanometer when being 940 nanometer with centre wavelength contrasts figure.
Fig. 4 is the quantum efficiency of imageing sensor and the graph of a relation of wavelength photoreceptor.
Fig. 5 is the filtration wavelength schematic diagram of filter.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to the scale of reality.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figures 2 and 3, video camera comprises: shell 1; Camera lens 2, it is arranged in shell 1, for catching object and imaging; Imageing sensor 5, it is arranged on the rear end of camera lens 2, is electrically connected with camera lens 2, image is sent to central processing unit 6 for the image that accepts captured by camera lens 2; And light compensating lamp 3, it is arranged on the sidepiece of camera lens 2, and the centre wavelength 7 (wavelength value when side-play amount is in maximum) of light compensating lamp 3 is between 950-1100 nanometer.
Common light compensating lamp 3 is connected by multiple light-emitting diode to combine, but due to the restriction of light-emitting diode self character, the luminescence band of light-emitting diode cannot be accomplished very narrow.As shown in Figure 3 (wherein, the contrast figure of wavelength 11 to be 940 nanometers and centre wavelength 7 be 980 nanometers centered by Fig. 3), and when the centre wavelength 7 of light compensating lamp 3 is in 950-1100 nanometer, center wave band can offset to long-wave band.Arrange by the way, effectively can reduce the wave band at visible ray, thus effectively can reduce the red phenomenon of exposing to the sun of light compensating lamp 3.
Further, the circumference along camera lens 2 can be provided with at least two light compensating lamps 3.Like this, can improving picture brightness effectively, thus improve the photographic effect of video camera.
In addition, the quantum efficiency of imageing sensor 5 the wavelength photoreceptor of imageing sensor 5 and the centre wavelength 7 of light compensating lamp 3 corresponding time promote (, when the wavelength photoreceptor of imageing sensor 5 is in centre wavelength 7 scope of light compensating lamp 3, the sensitivity of imageing sensor 5 is higher).Like this, effectively can improve the effect when shooting at night image, thus improve the definition of video camera when taking.The concrete mode that quantum efficiency promotes is known to the skilled person, and does not repeat them here.
Further, as shown in Figure 4 (wherein, wavelength photoreceptor when quantum efficiency promotes is 980 nanometers), when the wavelength photoreceptor of imageing sensor 5 is corresponding with the centre wavelength 7 of light compensating lamp 3, wavelength photoreceptor differs with centre wavelength 7 and is less than or equal to 6 nanometers.When the wavelength photoreceptor of imageing sensor 5 is corresponding with the centre wavelength 7 of light compensating lamp 3, the quantum efficiency of imageing sensor 5 is 25-30%.Like this, the effect when shooting at night can be improved further.Because light is generally mixed by the light of red, green, blue three kinds of colors, therefore quantum efficiency is that 25-30% refers to, the quantum efficiency of ruddiness 8, green glow 9 and blue light 10 is all between 25-30%.And the quantum efficiency of imageing sensor 5 is done lifting and referred to, the quantum efficiency of ruddiness 8, green glow 9 and blue light 10 all promotes.
In addition, filter 4 is also provided with at the exiting surface of light compensating lamp 3.Filter 4 for filtering the light of wavelength below 900 nanometers, to reduce red phenomenon of exposing to the sun further.Filter 4 is arranged on light compensating lamp 3, to reduce the reflection between light compensating lamp 3 and filter 4 by the mode of laminating.
In order to reduce the damage of filter 4, filter 4 can be arranged in shell 1.And when being sticked on light compensating lamp 3 by filter 4, filter 4 protrudes from camera lens 2.That is, the front end face (exiting surface) of light compensating lamp 3 and the front end face of camera lens 2 are in same plane, and the rear end face of filter 4 (incidence surface) is in same plane with the front end face of camera lens 2.Like this, dismounting filter 4 is convenient to.When being provided with multiple light compensating lamp 3, each light compensating lamp 3 can be equipped with filter 4.
Further, filter 4 can be unimodal coated filter, so that processing, saves cost, and improves light transmittance.Filter 4 can also filter the light of wavelength more than 1150 nanometers simultaneously, to improve the photographic effect of video camera further.
In a specific embodiment, the circumference along camera lens 2 is provided with two light compensating lamps 3 equably.The centre wavelength 7 of each light compensating lamp 3 is 980 nanometers.Imageing sensor 5 preferentially adopts COMS photosensitive sensors.When the wavelength photoreceptor of imageing sensor 5 is 980 nanometer, the quantum efficiency of imageing sensor 5 promotes.As shown in Figure 5, the filter wavelength of filter 4 is below 900 nanometers and more than 1050 nanometers.This video camera exposes to the sun without red substantially when night uses, and image effect is clear, and it is simple, convenient to use.
Although be described the utility model with reference to preferred embodiment, when not departing from scope of the present utility model, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, the every technical characteristic mentioned in each embodiment all can combine in any way.The utility model is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (7)
1. a video camera, is characterized in that, comprising: shell, arranges camera lens in the housing, and is arranged on the sidepiece of described camera lens and the light compensating lamp of centre wavelength between 950-1100 nanometer.
2. video camera according to claim 1, is characterized in that, is circumferentially with at least two light compensating lamps along described camera lens.
3. video camera according to claim 1, is characterized in that, also comprises and being sticked at the exiting surface of described light compensating lamp and the filter for filtering the light of wavelength below 900 nanometers.
4. video camera according to claim 3, is characterized in that, described filter is the unimodal coated filter simultaneously filtering the light of wavelength more than 1150 nanometers.
5. video camera according to claim 3, is characterized in that, described filter is configured to protrude from described camera lens.
6. the video camera according to any one of claim 1-5, is characterized in that, also comprise to be electrically connected with described camera lens and quantum efficiency promotes time wavelength photoreceptor value differ with the value of described centre wavelength the imageing sensor being no more than 6 nanometers.
7. video camera according to claim 6, is characterized in that, described imageing sensor is the imageing sensor that quantum efficiency is promoted to 25-30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520407566.6U CN204733247U (en) | 2015-06-12 | 2015-06-12 | A kind of video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520407566.6U CN204733247U (en) | 2015-06-12 | 2015-06-12 | A kind of video camera |
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| CN204733247U true CN204733247U (en) | 2015-10-28 |
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| CN201520407566.6U Active CN204733247U (en) | 2015-06-12 | 2015-06-12 | A kind of video camera |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646424A (en) * | 2016-09-30 | 2017-05-10 | 深圳市镭神智能系统有限公司 | Optical detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646424A (en) * | 2016-09-30 | 2017-05-10 | 深圳市镭神智能系统有限公司 | Optical detection system |
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