CN102789114A - Visible-infrared bi-pass camera - Google Patents
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Abstract
The invention discloses a visible-infrared bi-pass camera, which comprises an imaging device, an infrared light-path access, a visible light light-path access, an FPA (floating-point accelerator) chip, a visible light reading light-path and an optical receiver, wherein the imaging device comprises a visible-infrared imaging objective lens; the visible-infrared imaging objective lens comprises a light splitting device; the infrared light-path access is used for imaging the infrared light obtained from the light splitting of the light splitting device on the FPA chip through the infrared light-path access; the visible light light-path access is used for reading the image information on the FPA chip and reflecting the image information on the optical receiver; and the imaging device is used for imaging the visible light obtained from the light splitting of the light spitting device on the optical receiver through the visible light light-path access. According to the visible-infrared bi-pass camera disclosed by the embodiment of the invention, the splitting of the visible light and the infrared light on a light-path space is realized through light splitting devices, the infrared light imaging is realized by using the FPA chip, and the imaging information is read by the visible light light-path access and is displayed on the optical receiver subsequently, so that the system cost is reduced, and meanwhile the power consumption is reduced.
Description
Technical field
The present invention relates to the Instrument technology field of making a video recording, relate in particular to a kind of visible-infrared bilateral video camera.
Background technology
Along with monitoring and camera system day by day popularizing in commercial civil area, thermal camera (monitoring camera) is widely used in every field, for social security escorts.For each different application, need dissimilar rig cameras and meet the demands.Along with masses require to require increasingly highly such as what realize aspects such as monitoring in round-the-clock 24 hours, low price to monitoring product, be the variation of meeting the market requirement, manufacturer competitively develops visible and infrared day and night double-purpose video camera.
Domestic day and night video camera still need be equipped with certain illuminating equipment or infrared equipment at present; Utilization can all have the receiver of response to survey to the light path system of infrared light and visual light imaging with to infrared with visible light simultaneously, realizes the collection of active infra-red image/video.Above-mentioned design result makes the power consumption of entire system increase, and in the time of design and processing, need consider because the influence to light path system that infrared light causes, and has increased the cost of light path main body greatly.
Summary of the invention
In view of this, the present invention provide a kind of visible-infrared bilateral video camera, its concrete scheme is as follows:
A kind of visible-infrared bilateral video camera, comprising: imaging device, infrared light path path, visible light light path path, infrared focal plane array FPA chip, visible light read light path and optical receiver;
Wherein, said imaging device comprises: visible-the infrared imaging objective lens, said visible-the infrared imaging objective lens comprises: the light-splitting device that visible light and infrared light are separated on optical path space;
Said imaging device is imaged on the infrared light that said light-splitting device beam split obtains on the said FPA chip through said infrared light path; The light path that reads said visible light reads the image information on the said FPA chip, and said image information is reflected on the said optical receiver;
Said imaging device is imaged on the visible light that said optical splitter beam split obtains on the said optical receiver through said visible light light path path.
Preferably, said light-splitting device comprises: dual band pass optical filter, infrared light filter plate and the visible light filter plate of said dual band pass filtering mating plate for can in light path, moving into or shift out;
In said infrared light filter plate immigration light path, when said visible light filter plate shifted out light path, said imaging device, infrared light path path, FPA chip, visible light read light path and optical receiver is formed the infrared light light path;
In said visible light filter plate immigration light path, when said infrared light filter plate shifted out light path, said imaging device, visible light light path path, visible light read light path and optical receiver is formed the visible light light path.
Preferably, said imaging device also comprises: can transmitted infrared light the far infrared of reflect visible light-visible filter plate simultaneously;
To be imaged on the visible-infrared imaging eyepiece camera lens on the said FPA chip through the infrared light light beam of said far infrared-visible filter plate.
Preferably, said visible light light path path comprises: visible light bandpass filter and right-angle reflecting prism;
The transmission surface of said right-angle reflecting prism is coated with anti-reflection film, and two reflectings surface are coated with and increase anti-rete.
Preferably, said infrared light path path comprises:
The incoherent area array light source that has aperture pointolite wave filter, said incoherent area array light source forms a pointolite through said aperture filtering;
The light that said pointolite is sent becomes the collimation lens of directional light.
Preferably, said visible light reads light path and comprises: cube Amici prism, Fourier transform lens, spectrum filter and imaging lens, wherein:
Said cube of Amici prism surface is coated with and the corresponding transflective film of said pointolite wavelength;
Said Fourier transform lens is used to realize the conversion of image and frequency spectrum, converts the intensity signal of the image on the said FPA chip into spectrum information in the distance that is doubled in said Fourier transform lens focal length;
Said spectrum filter be provided with can with the light path vertical direction on the translation structure of translation; When said infrared light filter plate immigration light path is formed infrared light path; Said spectrum filter moves into light path through said translation structure; Receive the spectrum information after said Fourier transform lens is changed; And with forming images on said optical receiver through imaging lens after its filtering, when said visible light filter plate moved into light path composition visible light light path, said spectrum filter shifted out said light path through said translation structure.
Preferably, the distance between said FPA chip and the said Fourier transform lens and, the distance between said Fourier transform lens and the said spectrum filter is the focal length of said Fourier transform lens;
Distance between said spectrum filter and the said imaging lens and, the distance between said imaging lens and the said optical receiver is the focal length of said imaging lens.
Can find out from above-mentioned technical scheme; The embodiment of the invention disclosed visible-infrared bilateral video camera; Light-splitting device in-infrared imaging objective lens visible through being arranged at is realized visible light and infrared light separating on optical path space; And utilize the FPA chip to realize that infrared light forms images, read through visible light on optical receiver, to show after light path reads image-forming information, thereby make the imaging process of infrared light can utilize the optical receiver that only visible light is responded; Need not to adopt all has the receiver of response to survey to infrared light and visible light; Need not to consider the influence factor of infrared light, reduced system cost, reduced power consumption simultaneously light path system.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 be present embodiment disclosed visible-structural representation of infrared bilateral video camera;
Fig. 2 be present embodiment disclosed another visible-structural representation of infrared bilateral video camera;
Fig. 3 be present embodiment disclosed another visible-structural representation of infrared bilateral video camera.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The present invention be embodiment disclosed visible-infrared bilateral video camera; Its structure is as shown in Figure 1, comprising: imaging device 11, infrared light path path 12, visible light light path path 13, infrared focal plane array FPA chip 14, visible light read light path 15 and optical receiver 16.
Wherein, Said imaging device 11 comprises: visible-the infrared imaging objective lens; Said visible-the infrared imaging objective lens comprises: the light-splitting device that visible light and infrared light are separated on optical path space; Imaging device 11 is imaged on the infrared light that said light-splitting device beam split obtains on the said FPA chip through said infrared light path, and said visible light reads light path and reads the image information on the said FPA chip, and said image information is reflected on the said optical receiver; Imaging device is imaged on the visible light that said optical splitter beam split obtains on the said optical receiver through said visible light light path path.
FPA chip in the present embodiment is based on two material chips of hot mechanical principle; Handle through vacuum chamber encapsulation and constant temperature,, protect it not receive the influence of ambient temperature so that chip is carried out temperature control; Thereby guarantee that better its mechanical response is be directed against monitoring objective thermal-radiating; Reduce because the mechanical deformation that extraneous other reasons causes, thereby make the hot mechanical deformation of FPA chip can better reflect the situation of monitoring objective self, improved the accuracy of imaging.Optical receiver is for only carrying out corresponding optical receiver to visible light.
Present embodiment disclosed visible-infrared bilateral video camera; Light-splitting device in-infrared imaging objective lens visible through being arranged at is realized visible light and infrared light separating on optical path space; And utilize the FPA chip to realize the infrared light imaging; Read through visible light and on optical receiver, to show after light path reads image-forming information, thereby make the imaging process of infrared light can utilize the optical receiver that only visible light is responded, need not to adopt all has the receiver of response to survey to infrared light and visible light; Reduce system cost, reduced power consumption simultaneously.
Further, because the corresponding different light path of different light, to the high-level requirement of light path system, reduced the difficulty of processing and the cost of light path element when having solved available technology adopting simultaneously to the light path system of infrared light and visual light imaging.
The embodiment of the invention disclosed another visible-structure of infrared bilateral video camera is as shown in Figure 2, comprising: imaging device 21, infrared light path path 22, visible light light path path 23, infrared focal plane array FPA chip 24, visible light read light path 25 and optical receiver 26.
Wherein, Imaging device 21 comprises visible-infrared imaging objective lens 211; It is thus clear that the light-splitting device the in-infrared imaging objective lens 211 comprises: the dual band pass optical filter; Infrared light filter plate and the visible light filter plate of this dual band pass optical filter for can in light path, moving into or shift out; In said infrared light filter plate immigration light path, when said visible light filter plate shifted out light path, said imaging device, infrared light path path 22, FPA chip 24, visible light read light path 25 and optical receiver 26 is formed the infrared light light paths; In said visible light filter plate immigration light path, when said infrared light filter plate shifted out light path, said imaging device, visible light light path path 23, visible light read light path 24 and optical receiver 26 is formed the visible light light paths.
Further, visible light light path path 23 comprises: visible light bandpass filter 231 and right-angle reflecting prism 232; The transmission surface of said right-angle reflecting prism 232 is coated with anti-reflection film, and two reflectings surface are coated with and increase anti-rete.
Said infrared light path path 22 comprises: incoherent area array light source 221 and collimation lens 222, and incoherent area array light source 221 has aperture pointolite wave filter, and said incoherent area array light source 221 forms a pointolite through said aperture filtering; Collimation lens 222 becomes directional light with the light that said pointolite sends.
Visible light reads light path 25 and comprises: cube Amici prism 251, Fourier transform lens 252, spectrum filter 253 and imaging lens 254.Cube Amici prism 251 is done the space with the light of right-angle reflecting prism reflection and transmission and is turned back; Making visible light to read light path through visible light is finally received by optical receiver; And; Visible light is read collimated light in the light path do and incide after turning back in the space on the FPA chip, the reflected light of chip can be once more gets into a visible light through cube Amici prism and read light path and finally received by optical receiver simultaneously.This element has greatly reduced light path when realizing its basic function, reduced system bulk.Fourier transform lens 252 is realized the conversion of image and frequency spectrum, in the distance that is doubled in said Fourier transform lens focal length, promptly on the frequency plane of spectrum filter 253; Convert the intensity signal of FPA image into spectrum information, spectrum filter 253 be provided with can with the light path vertical direction on the translation structure of translation, when said infrared light filter plate moves into light path when forming infrared light path; Said spectrum filter 253 moves into light path through said translation structure; Receive the spectrum information after said Fourier transform lens 252 changes, and the frequency that reflects from the FPA frame part of filtering differs from the light of reflecting surface frequency spectrum, then filtered light is formed images on said optical receiver 26 through imaging lens 244; The light of same frequency spectrum meets at a bit under the ideal situation; But in the actual light path be a hot spot, different angles is that the light of spatial frequency incident is positioned at diverse location at the frequency spectrum place, because there is hot mechanical deformation in FPA; Each pixel is through absorbing the deflection that certain angle takes place heat; Then its spectrum position will change through the light intensity after the spectrum filter 253 along with variation of temperature also certain displacement can take place so, and this variation meeting is received by optical receiver 26; And the heat deformation of FPA is done light intensity restore, draw infrared image.When said visible light filter plate moved into light path composition visible light light path, said spectrum filter 253 shifted out said light path through said translation structure, visible light is not handled, and visible light directly forms images on optical receiver through imaging lens.
In the said structure, the typical 4f of composition system between FPA chip 24, Fourier transform lens 252, spectrum filter 253, imaging lens 254 and the optical receiver 26.Wherein, Distance between FPA chip 24 and the Fourier transform lens 252; And the distance between Fourier transform lens 252 and the spectrum filter 253 is the focal length of Fourier transform lens 252, the distance between said spectrum filter 253 and the said imaging lens 254 and; Distance between said imaging lens 254 and the said optical receiver 26 is the focal length of said imaging lens 254.
Present embodiment disclosed visible-principle of work of infrared bilateral video camera is described below:
In the present embodiment; When the infrared light filter plate moves in the light path; When said visible light filter plate shifts out light path; Have visible-infrared imaging objective lens 211, the far infrared-visible filter plate 212 of infrared light filter plate, visible-infrared imaging eyepiece camera lens 213, FPA chip 24, incoherent area array light source 221, collimation lens 222, cube Amici prism 251, Fourier transform lens 252, spectrum filter 253, imaging lens 254 and optical receiver 26 and form the infrared light light paths; This light path can work under the faint environment of night vision function or visible light, and this moment is visible-and the infrared light filter plate of infrared imaging objective lens 211 passes through infrared light.Far infrared-visible filter plate 212 carries out transmission with infrared light, utilizes visible-infrared imaging eyepiece camera lens 213 in 24 imagings of FPA chip, and incoherent area source 221 forms pointolite through behind the small filter; The light beam of pointolite becomes the collimation parallel beam through behind the collimation lens, is deflected into through cube spectroscope 251 to be mapped on the FPA chip 24; Because the back side of FPA chip 24 produces thermal effect owing to absorbing infrared light; Thereby make the skew that reflecting surface based on the semi-girder of two materials can produce certain angle, therefore, the skew that can produce certain angle through this reflecting surface beam reflected; The frequency spectrum of the light beam with angular deflection that Fourier transform lens 252 will receive becomes on the frequency plane of spectrum filter 253 positions; Spectrum filter 253 can filter out the light that the frequency that reflects from the FPA frame part differs from the reflecting surface frequency spectrum, and when skew takes place beam angle, owing to its spectrum position can move along with the variation of angle; Can also corresponding variation can take place thereupon so through the luminous flux of this wave filter 253; Thereby the light intensity signal and its reference time point that cause optical receiver 26 to receive, the image that does not promptly take place to gather when angle changes is compared, and has produced the gray level variation; Utilize this gray level to change, can obtain the infrared light imaging.
When the visible light filter plate moves in the light path; When the infrared light filter plate shifts out light path, have visible-infrared imaging objective lens 211, the far infrared-visible filter plate 212 of visible light filter plate, visible-infrared imaging eyepiece camera lens 213, visible light bandpass filter 231, right-angle reflecting prism 232, cube Amici prism 251, Fourier transform lens 252, imaging lens 254 and optical receiver 26 and form the visible light light paths.It is thus clear that the visible light filter plate of-infrared imaging objective lens 211 passes through visible light; Visible light via far infrared-visible filter plate 212 reflections after through visible light bandpass filter 231; Keep and the identical visible light of incoherent area array light source wavelength; The visible light of other wavelength of filtering through after two secondary reflections of right-angle reflecting prism 232, is transmitted through cube Amici prism 251 with the visible light that obtains; After its reflection, through the finally imaging on optical receiver 26 of Fourier transform lens 252, imaging lens 254.
Can be found out that by above-mentioned principle of work above-mentioned two light paths were worked under varying environment and time period, when daytime, light carried out imaging observation under the situation preferably, visible light filter plate that then will visible-infrared imaging objective lens 211 moved into light path; When infrared night vision function was opened, the infrared light filter plate of visible-infrared imaging objective lens 211 moved into light path, let infrared ray get into, and realized day and night double vision function through the conversion operations of dual band pass filter plate.
It is the dual band pass optical filter that present embodiment does not limit light-splitting device, and it can also can carry out the device of beam split for grating, prism etc.
Based on above-mentioned principle of work, the embodiment of the invention disclosed another visible-structure of infrared bilateral video camera is as shown in Figure 3, its basic structure is same as shown in Figure 2, has just carried out corresponding adjustment owing to the logical light of filter plate is different with reflective frequency range.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part is partly explained referring to method and is got final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (7)
1. visible-infrared bilateral video camera is characterized in that comprise: imaging device, infrared light path path, visible light light path path, infrared focal plane array FPA chip, visible light read light path and optical receiver;
Wherein, said imaging device comprises: visible-the infrared imaging objective lens, said visible-the infrared imaging objective lens comprises: the light-splitting device that visible light and infrared light are separated on optical path space;
Said imaging device is imaged on the infrared light that said light-splitting device beam split obtains on the said FPA chip through said infrared light path; The light path that reads said visible light reads the image information on the said FPA chip, and said image information is reflected on the said optical receiver;
Said imaging device is imaged on the visible light that said optical splitter beam split obtains on the said optical receiver through said visible light light path path.
2. video camera according to claim 1 is characterized in that, said light-splitting device comprises: dual band pass optical filter, infrared light filter plate and the visible light filter plate of said dual band pass filtering mating plate for can in light path, moving into or shift out;
In said infrared light filter plate immigration light path, when said visible light filter plate shifted out light path, said imaging device, infrared light path path, FPA chip, visible light read light path and optical receiver is formed the infrared light light path;
In said visible light filter plate immigration light path, when said infrared light filter plate shifted out light path, said imaging device, visible light light path path, visible light read light path and optical receiver is formed the visible light light path.
3. video camera according to claim 2 is characterized in that, said imaging device also comprises: can transmitted infrared light the far infrared of reflect visible light-visible filter plate simultaneously;
To be imaged on the visible-infrared imaging eyepiece camera lens on the said FPA chip through the infrared light light beam of said far infrared-visible filter plate.
4. video camera according to claim 3 is characterized in that, said visible light light path path comprises: visible light bandpass filter and right-angle reflecting prism;
The transmission surface of said right-angle reflecting prism is coated with anti-reflection film, and two reflectings surface are coated with and increase anti-rete.
5. video camera according to claim 4 is characterized in that, said infrared light path path comprises:
The incoherent area array light source that has aperture pointolite wave filter, said incoherent area array light source forms a pointolite through said aperture filtering;
The light that said pointolite is sent becomes the collimation lens of directional light.
6. video camera according to claim 4 is characterized in that, said visible light reads light path and comprises: cube Amici prism, Fourier transform lens, spectrum filter and imaging lens, wherein:
Said cube of Amici prism surface is coated with and the corresponding transflective film of said pointolite wavelength;
Said Fourier transform lens is used to realize the conversion of image and frequency spectrum, converts the intensity signal of the image on the said FPA chip into spectrum information in the distance that is doubled in said Fourier transform lens focal length;
Said spectrum filter be provided with can with the light path vertical direction on the translation structure of translation; When said infrared light filter plate immigration light path is formed infrared light path; Said spectrum filter moves into light path through said translation structure; Receive the spectrum information after said Fourier transform lens is changed; And with forming images on said optical receiver through imaging lens after its filtering, when said visible light filter plate moved into light path composition visible light light path, said spectrum filter shifted out said light path through said translation structure.
7. according to claim 4 or 5 described video cameras; It is characterized in that, the distance between said FPA chip and the said Fourier transform lens and; Distance between said Fourier transform lens and the said spectrum filter is the focal length of said Fourier transform lens;
Distance between said spectrum filter and the said imaging lens and, the distance between said imaging lens and the said optical receiver is the focal length of said imaging lens.
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