CN205067781U - Four -color light filter - Google Patents
Four -color light filter Download PDFInfo
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- CN205067781U CN205067781U CN201520787033.5U CN201520787033U CN205067781U CN 205067781 U CN205067781 U CN 205067781U CN 201520787033 U CN201520787033 U CN 201520787033U CN 205067781 U CN205067781 U CN 205067781U
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Abstract
The utility model discloses a four -color light filter, including the sapphire basement, a sapphire basement wherein coating by vaporization has the AR rete, the relative another side of sapphire basement divides five black mask districts and four filter coating districts into, wherein, NULL is in proper order distinguished to five black mask districts and four filter coatings, black mask district is black chromium coating film layer, four filter coating districts are blue optical filtering coating film layer, green optical filtering coating film layer, orange optical filtering coating film layer and black optical filtering coating film layer respectively. The utility model discloses the four -color filter coating of light filter is lieing in the passband filter coating of different spectral coverages respectively, corresponds the colour of four kinds of differences respectively, and wherein three kinds of colours lie in the visible light spectral coverage, can be at furthest reduction on daytime image color, and fourth kind colour lies in the near -infrared spectral coverage, can increase CCD's the ability of forming images at night.
Description
Technical field
The utility model relates to a kind of four colo(u)r filters, belongs to CCD technical field of photoelectric detection.
Background technology
In recent decades, the research of CCD device and application technology thereof achieves breakthrough, is widely used in digital photography, uranology, especially optical telemetry technology, optics and frequency spectrum telescope and high speed photography field.Colour TV camera CCD is very responsive to infrared light, the image colour cast of detecting can be caused or occur the image that human eye be can't see, therefore need to add a tablet filter, in conjunction with CCD receiver, light middle infrared (Mid-IR) Partial filtration is fallen, the false colour preventing CCD image sensor from producing due to pixel separation and ripple, improve the impact of infrared ray on CCD imaging.
The small photoactive substance of the upper implantation of CCD is called pixel, and the pixel that one piece of CCD comprises is more, and its screen resolution provided is higher.Each pixel cell comprises again multiple sub-pixel, and each sub-pixel has a kind of optical filter of color, makes this sub-pixel show corresponding color, forms color space.Now widely used single optical filter while finishing light and the visual realistic colour of reduction, also filtering infrared ray, therefore, when night without visible ray, just cannot imaging.In order to address this problem, develop bimodal optical filter, although this optical filter is with low cost, also the wavelength taking into account daytime and evening attracts, but owing to having opened wave frequency, and in order to consider the imaging effect on daytime and evening, the waveform of optical filter is just difficult to adapt to completely, daytime is some infrared light interfering picture color rendition still, evening is due to the filtration of bimodal optical filter, make CCD can not make full use of all light, thus produce snow phenomenon, and reduce the sharpness of infrared imaging.Therefore a kind of exploitation of multi-color filter is necessary.But current multi-color filter is designed to cascaded structure by some coloured glass, corresponding corresponding sub-pixel, be integrated on a pixel cell, and the cascaded structure of multiple coloured glass relates to repeatedly gluing operation respectively, not easy to operate.
Utility model content
Utility model object: technical problem to be solved in the utility model is to provide a kind of four colo(u)r filters, this four colo(u)r filter adopts optical filtering plated film to substitute coloured glass, its (four colo(u)r filter) four look filter coating is respectively the passband filter coating being positioned at different spectral coverage, the color that correspondence four kinds is different respectively, wherein three kinds of colors are positioned at visible spectrum, can reduce image color by day to greatest extent, the 4th kind of color is positioned at near-infrared spectra section, can increase the nighttime imaging ability of CCD.
Utility model content: for solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of four colo(u)r filters, comprise sapphire substrates, a described sapphire substrates wherein evaporation has AR rete, the relative another side of described sapphire substrates is divided into five black masks districts and four filter coating districts, wherein, described five black masks districts and four filter coating districts are alternately arranged successively, and described black masks district is black chromium film plating layer, and described four filter coating districts are respectively blue filter film plating layer, green filter film plating layer, orange optical filtering film plating layer and black optical filtering film plating layer.
Wherein, the rete diplopia width of described blue filter film plating layer, green filter film plating layer, orange optical filtering film plating layer and black optical filtering film plating layer is 10 μm.
Wherein, described blue filter plated film passband is 425nm ~ 475nm, front cut-off location wavelength X 1 is 425nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 475nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
Wherein, described green filter plated film passband is 510nm ~ 560nm, front cut-off location wavelength X 1 is 490nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 550nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
Wherein, described orange optical filtering plated film passband is 590nm ~ 625nm, front cut-off location wavelength X 1 is 590nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 625nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
Wherein, described black optical filtering plated film passband is 850nm ~ 1030nm, front cut-off location wavelength X 1 is 850nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 1030nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
Beneficial effect: compared to prior art, four look filter coatings of the present utility model are respectively the passband filter coating being positioned at different spectral coverage, the color that correspondence four kinds is different respectively, wherein three kinds of colors are positioned at visible spectrum, can reduce image color by day to greatest extent, 4th kind of color is positioned at near-infrared spectra section, can increase the nighttime imaging ability of CCD; In addition, the utility model four colo(u)r filter selects sapphire as base material, sapphire substrates can absorption portion infrared light thus filter infrared ray, thus coordinate ccd sensor play better imaging effect; Finally, the utility model four colo(u)r filter adopts optical filtering plated film to substitute coloured glass, not only enormously simplify the job sequence of multi-color filter, be easy to operation, and the conjugation of filter membranous layer and substrate is better.
Accompanying drawing explanation
Fig. 1 is the front view of the utility model four colo(u)r filter;
Fig. 2 is the left view of the utility model four colo(u)r filter;
Fig. 3 is the result of use figure of the utility model four colo(u)r filter.
Embodiment
According to following embodiment, the utility model can be understood better.But those skilled in the art will readily understand, the content described by embodiment only for illustration of the utility model, and should can not limit the utility model described in detail in claims yet.
Composition graphs 1 ~ 3, four colo(u)r filters of the present utility model, comprise sapphire substrates 6, sapphire substrates 6 is in strip, select sapphire 6 as base material, can absorption portion infrared ray, avoid infrared ray on the impact of CCD imaging, sapphire substrates 6 wherein one side adopts mode evaporation one deck AR film 7 of vacuum coating, AR film 7 is upper average reflectance R < 1% in spectral coverage 410nm ~ 1050nm, light can reach the penetrance of 99%, thus improve the light sensitivity of CCD, simultaneously AR film 7 is positioned at outermost layer and is conducive to protecting optical filter, optical filter is not easy to haze, sapphire substrates 6 relatively another side is divided into five black masks districts 5 and four filter coating districts, wherein, five black masks districts 5 and four filter coating districts are alternately arranged successively, five black masks districts 5 are closely connected with four filter coating districts, and each district is also in strip, each black masks district 5 all adopts the black chromium plated film (floor) 5 of mode evaporation one deck of vacuum coating, the average reflectance R < 1% of black chromium plated film 5, its reflection characteristic is diffuse reflection, four filter coating districts respectively evaporation be blue filter plated film 1, green filter plated film 2, orange optical filtering plated film 3 and black optical filtering plated film 4, blue filter plated film 1, green filter plated film 2, the rete diplopia width of orange optical filtering plated film 3 and black optical filtering plated film 4 is 10 μm, rete diplopia refers to the uneven district at rete edge,
Wherein, the passband of blue filter plated film 1 is 425nm ~ 475nm, front cut-off location wavelength X 1 is 425nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 475nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%;
Wherein, the passband of green filter plated film 2 is 510nm ~ 560nm, front cut-off location wavelength X 1 is 490nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 550nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%;
Wherein, the passband of orange optical filtering plated film 3 is 590nm ~ 625nm, front cut-off location wavelength X 1 is 590nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 625nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%;
Wherein, the passband of black optical filtering plated film 4 is 850nm ~ 1030nm, front cut-off location wavelength X 1 is 850nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 1030nm, positioning error ± 10nm, steepness 20nm, total transmitance T > 85% in λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%, black optical filtering plated film 4 passband is positioned near infrared spectral coverage, make ccd sensor have night vision function, namely increase the nighttime imaging ability of CCD.
The utility model four colo(u)r filter also can carry out corresponding selection as required in the passband of different spectral coverage.
Claims (6)
1. a colo(u)r filter, it is characterized in that: comprise sapphire substrates, a described sapphire substrates wherein evaporation has AR rete, the relative another side of described sapphire substrates is divided into five black masks districts and four filter coating districts, wherein, described five black masks districts and four filter coating districts are alternately arranged successively, described black masks district is black chromium film plating layer, and described four filter coating districts are respectively blue filter film plating layer, green filter film plating layer, orange optical filtering film plating layer and black optical filtering film plating layer.
2. four colo(u)r filters according to claim 1, is characterized in that: the rete diplopia width of described blue filter film plating layer, green filter film plating layer, orange optical filtering film plating layer and black filter coating is 10 μm.
3. four colo(u)r filters according to claim 1, it is characterized in that: described blue filter plated film passband is 425nm ~ 475nm, front cut-off location wavelength X 1 is 425nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 475nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
4. four colo(u)r filters according to claim 1, it is characterized in that: described green filter plated film passband is 510nm ~ 560nm, front cut-off location wavelength X 1 is 490nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 550nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
5. four colo(u)r filters according to claim 1, it is characterized in that: described orange optical filtering plated film passband is 590nm ~ 625nm, front cut-off location wavelength X 1 is 590nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 625nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
6. four colo(u)r filters according to claim 1, it is characterized in that: described black optical filtering plated film passband is 850nm ~ 1030nm, front cut-off location wavelength X 1 is 850nm, positioning error ± 10nm, steepness 20nm, rear cut-off location wavelength X 2 is 1030nm, positioning error ± 10nm, total transmitance T > 85% in steepness 20nm, λ 1 ~ λ 2 spectral coverage, cut-off wave band average reflectance R < 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520787033.5U CN205067781U (en) | 2015-10-13 | 2015-10-13 | Four -color light filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520787033.5U CN205067781U (en) | 2015-10-13 | 2015-10-13 | Four -color light filter |
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| CN205067781U true CN205067781U (en) | 2016-03-02 |
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| CN201520787033.5U Expired - Fee Related CN205067781U (en) | 2015-10-13 | 2015-10-13 | Four -color light filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242339A (en) * | 2015-10-13 | 2016-01-13 | 南京茂莱光学科技股份有限公司 | Four-color optical filter |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242339A (en) * | 2015-10-13 | 2016-01-13 | 南京茂莱光学科技股份有限公司 | Four-color optical filter |
| CN105242339B (en) * | 2015-10-13 | 2017-09-05 | 南京茂莱光学科技股份有限公司 | A kind of four colo(u)r filters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20181013 |