CN203287553U - Infrared cutoff filter - Google Patents
Infrared cutoff filter Download PDFInfo
- Publication number
- CN203287553U CN203287553U CN2013203072727U CN201320307272U CN203287553U CN 203287553 U CN203287553 U CN 203287553U CN 2013203072727 U CN2013203072727 U CN 2013203072727U CN 201320307272 U CN201320307272 U CN 201320307272U CN 203287553 U CN203287553 U CN 203287553U
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- cutoff filter
- infrared cutoff
- substrate
- index material
- infrared
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Abstract
The utility model discloses an infrared cutoff filter and belongs to the technical field of an optical filter. The infrared cutoff filter comprises a substrate; the substrate is made of white glass; the front surface of the substrate is plated with a reflection reducing coating; the back surface is plated with infrared cutoff membrane; the reflection reducing coating and the infrared cutoff membrane are formed by alternatively stacking high-index material film layers and a low-index material film layers; the layer number of the reflection reducing coating is seven; and the layer number of the infrared cutoff membrane is 47. The infrared cutoff filter has the following advantages: the purpose is achieved that visible light can penetrate the infrared cutoff filter at an incident angle of 0 to 30 degrees to the maximum, the color reduction effects are better than that of the blue glass infrared cutoff filter, and the cost is saved by almost 30% without any big changes in the total plated film thickness and the processing time.
Description
Technical field
The utility model relates to the optical filter technical field, particularly a kind of cutoff filter.
Background technology
cutoff filter is that a kind of permission visible light (400nm-700nm) sees through, and the optical filter of cut-off or reflect near infrared light (700nm-1100nm), be widely used in digital camera, mobile phone cam, the digital image-forming fields such as computer camera, add cutoff filter between pick-up lens and CCD/CMOS imageing sensor, the energy elimination is by taking the photograph the high band light wave of phase camera lens, only allow the interior low frequency light wave of certain limit pass through, thereby filtering infrared waves effectively, eliminate its interference to the CCD/CMOS imaging, improve resolution and the color reducibility of imaging, make clear picture and stable.
Traditional cutoff filter is alternately to form the infrared cut coating with certain thickness high index of refraction or low-refraction on white glass surface, utilizes the interference of multilayer film to realize the cut-off infrared light, sees through the function of visible light.But this infrared cut coating is only considered visible light and see through effect when vertical incidence, and the transmitance while having ignored wide-angle incident, and the wavelength shift meeting of traditional infrared cut film causes the heavy losses of red light portion, image quality degradation when wide-angle incident.
Another kind is the smalt cutoff filter, reaches the effect of cut-off infrared waves by be coated with infrared cut coating on the smalt surface.The problem of spectral shift when although this smalt cutoff filter has solved rake angle incident, but it just starts to absorb light wave from ruddiness and extends to infrared light always, cause the visible ruddiness of part to be filtered, the loss of ruddiness can cause the reduction of color reducibility, thereby affects the image quality of camera.And the cost of raw material of smalt own is high, also is unfavorable at present on low-end product universal in a large number.
The utility model content
Technical problem to be solved in the utility model is to overcome the problems referred to above, and provide that a kind of color rendition degree is high, imaging effect good, cutoff filter with low cost.
The technical solution of the utility model is:
A kind of cutoff filter, comprise substrate, it is characterized in that: the material of substrate is white glass, the front surface of substrate is coated with anti-reflection film, rear surface is coated with infrared cut coating, described anti-reflection film and infrared cut coating replace stacking forming by the rete of high-index material and low-index material, and the number of plies of anti-reflection film is 7 layers, and the number of plies of infrared cut coating is 47 layers.
The thickness of substrate described in the utility model is 0.7mm.
The thickness of anti-reflection film described in the utility model and infrared cut coating adds up to 5.5 μ m.
High-index material described in the utility model is Ti
O
Or TiO
Or ZrO
Low-index material described in the utility model is SiO
The beneficial effects of the utility model are: by on the white glass surface, redesigning film structure, adjust the centre wavelength of anti-reflection film and infrared cut coating, realize the purpose that visible light sees through 0-30 ° of incident angle maximum possible, and reach the color rendition effect that is better than the smalt cutoff filter, and the gross thickness of plated film and process time change little, the cost of white glass substrate but reduces a lot compared to the smalt substrate, therefore the image quality of product not only can be improved, 30% cost nearly can be saved again.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the transmission spectrum curve of smalt cutoff filter;
Fig. 3 is the transmission spectrum curve of the cutoff filter of the utility model embodiment.
Embodiment
Now reaching by reference to the accompanying drawings embodiment is further described the utility model:
As shown in Figure 1, cutoff filter of the present utility model, comprise substrate 1, the material of substrate 1 is white glass, and the thickness of substrate 1 is 0.7mm, and the front surface of substrate 1 is coated with anti-reflection film 2, strengthen seeing through of visible light, rear surface is coated with infrared cut coating 3, the cut-off infrared light.Anti-reflection film 2 and infrared cut coating 3 replace stacking forming by the rete of high-index material and low-index material, and high-index material is Ti
O
, TiO
, ZrO
In a kind of, low-index material is SiO
The number of plies of anti-reflection film 2 is 7 layers, and the number of plies of infrared cut coating 3 is 47 layers, and the thickness of front and back membrane stack adds up to 5.5 μ m.
The preparation method of cutoff filter of the present utility model is: by Vacuum Coating method, high-index material and low-index material are alternately covered the two sides of white glass substrate, thereby form anti-reflection film 2 and infrared cut coating 3.
As shown in Figure 2, transmission spectrum curve for the smalt cutoff filter, in figure, transverse axis represents spectral band, the longitudinal axis represents transmissivity, solid line is the transmission spectrum curve of 0 ° of incident angle, dotted line is the transmission spectrum curve of 30 ° of incident angles, can find out, the smalt cutoff filter has solved the problem of traditional infrared cutoff filter wavelength shift, but it just starts to absorb and the cut-off light wave from red spectral band, although effectively filtering infrared waves, also caused the loss of part visible light simultaneously, affect color rendition effect and the image quality of imaging.
As shown in Figure 3, transmission spectrum curve for the cutoff filter of the utility model embodiment, in figure, transverse axis represents spectral band, the longitudinal axis represents transmissivity, solid line is the transmission spectrum curve of 0 ° of incident angle, dotted line is the transmission spectrum curve of 30 ° of incident angles, can find out, the whole transmissivity of visible light remains on more than 95%.In addition, use 50% transmissivity as reference, when 0 ° of incident, 50% transmissivity wavelength is at 678.6nm, during 30 ° of incident, 50% transmissivity wavelength, at 656.6nm, is compared with the traditional infrared cutoff filter, increase centre wavelength, guaranteed that visible light sees through most possibly, reduced the loss of red light portion.
The utility model is by the film structure of redesign and adjustment cutoff filter, realized the purpose that visible light sees through 0-30 ° of incident angle maximum possible, and reached color rendition effect and the image quality that is better than the smalt cutoff filter, and with low cost, be very advantageous on low-end product universal in a large number.
Claims (5)
1. cutoff filter, comprise substrate, it is characterized in that: the material of substrate is white glass, the front surface of substrate is coated with anti-reflection film, rear surface is coated with infrared cut coating, described anti-reflection film and infrared cut coating replace stacking forming by the rete of high-index material and low-index material, and the number of plies of anti-reflection film is 7 layers, and the number of plies of infrared cut coating is 47 layers.
2., according to a kind of cutoff filter claimed in claim 1, it is characterized in that: the thickness of described substrate is 0.7mm.
3., according to a kind of cutoff filter claimed in claim 1, it is characterized in that: the thickness of described anti-reflection film and infrared cut coating adds up to 5.5 μ m.
4., according to a kind of cutoff filter claimed in claim 1, it is characterized in that: described high-index material is Ti
O
Or TiO
Or ZrO
5., according to a kind of cutoff filter claimed in claim 1, it is characterized in that: described low-index material is SiO
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203072727U CN203287553U (en) | 2013-05-31 | 2013-05-31 | Infrared cutoff filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203072727U CN203287553U (en) | 2013-05-31 | 2013-05-31 | Infrared cutoff filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203287553U true CN203287553U (en) | 2013-11-13 |
Family
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|---|---|---|---|
| CN2013203072727U Expired - Fee Related CN203287553U (en) | 2013-05-31 | 2013-05-31 | Infrared cutoff filter |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594489A (en) * | 2013-11-29 | 2014-02-19 | 信利半导体有限公司 | Organic light-emitting diode (OLED) display device with touch control function |
| CN104765089A (en) * | 2015-04-24 | 2015-07-08 | 东莞市微科光电科技有限公司 | Infrared cut-off film design method reducing 30-degree beam split curve short shift amount |
| CN104777541A (en) * | 2015-04-24 | 2015-07-15 | 东莞市微科光电科技有限公司 | Method for finding out reason for making deviation of infrared ending films in manner of moving up and down |
| CN105827905A (en) * | 2015-07-27 | 2016-08-03 | 维沃移动通信有限公司 | Electronic device and camera module |
| CN106772746A (en) * | 2016-12-26 | 2017-05-31 | 信阳舜宇光学有限公司 | Cutoff filter and preparation method thereof |
| CN107450119A (en) * | 2016-05-30 | 2017-12-08 | 现代自动车株式会社 | Infrared filter |
| CN107577006A (en) * | 2017-10-13 | 2018-01-12 | 无锡奥芬光电科技有限公司 | A kind of low incidence dependence of angle cutoff filter |
| CN108627887A (en) * | 2018-05-30 | 2018-10-09 | 浙江美迪凯现代光电有限公司 | Large scale is thinned substrate film coating and its processing technology |
| CN109975905A (en) * | 2017-12-28 | 2019-07-05 | Ａｇｃ株式会社 | Near infrared ray cut-off filter |
| CN110248906A (en) * | 2017-02-10 | 2019-09-17 | Ｋｃｃ公司 | Low reflective coating film glass |
| WO2020029579A1 (en) * | 2018-08-06 | 2020-02-13 | 信阳舜宇光学有限公司 | Optical filter and infrared image sensing system comprising same |
| CN110865433A (en) * | 2019-12-27 | 2020-03-06 | 江西水晶光电有限公司 | Optical filter for identifying fingerprints under screen and preparation method thereof |
| CN111323124A (en) * | 2020-04-02 | 2020-06-23 | 四川双利合谱科技有限公司 | Broadband hyperspectral camera with mounting structure and film coating method thereof |
| CN113504666A (en) * | 2021-07-20 | 2021-10-15 | 武汉华星光电技术有限公司 | Display device |
| CN115166886A (en) * | 2022-06-14 | 2022-10-11 | 浙江晶驰光电科技有限公司 | Infrared cut-off filter with ultralow angle offset effect |
-
2013
- 2013-05-31 CN CN2013203072727U patent/CN203287553U/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594489A (en) * | 2013-11-29 | 2014-02-19 | 信利半导体有限公司 | Organic light-emitting diode (OLED) display device with touch control function |
| CN103594489B (en) * | 2013-11-29 | 2016-04-13 | 信利光电股份有限公司 | A kind of OLED display with touch controllable function |
| CN104765089A (en) * | 2015-04-24 | 2015-07-08 | 东莞市微科光电科技有限公司 | Infrared cut-off film design method reducing 30-degree beam split curve short shift amount |
| CN104777541A (en) * | 2015-04-24 | 2015-07-15 | 东莞市微科光电科技有限公司 | Method for finding out reason for making deviation of infrared ending films in manner of moving up and down |
| CN104777541B (en) * | 2015-04-24 | 2017-05-10 | 东莞市微科光电科技有限公司 | Method for finding out reason for making deviation of infrared ending films in manner of moving up and down |
| CN105827905A (en) * | 2015-07-27 | 2016-08-03 | 维沃移动通信有限公司 | Electronic device and camera module |
| CN107450119B (en) * | 2016-05-30 | 2021-04-23 | 现代自动车株式会社 | Infrared filter |
| CN107450119A (en) * | 2016-05-30 | 2017-12-08 | 现代自动车株式会社 | Infrared filter |
| CN106772746A (en) * | 2016-12-26 | 2017-05-31 | 信阳舜宇光学有限公司 | Cutoff filter and preparation method thereof |
| US11261128B2 (en) | 2017-02-10 | 2022-03-01 | Kcc Glass Corporation | Low-reflection coating glass |
| CN110248906A (en) * | 2017-02-10 | 2019-09-17 | Ｋｃｃ公司 | Low reflective coating film glass |
| CN107577006A (en) * | 2017-10-13 | 2018-01-12 | 无锡奥芬光电科技有限公司 | A kind of low incidence dependence of angle cutoff filter |
| CN109975905A (en) * | 2017-12-28 | 2019-07-05 | Ａｇｃ株式会社 | Near infrared ray cut-off filter |
| CN108627887A (en) * | 2018-05-30 | 2018-10-09 | 浙江美迪凯现代光电有限公司 | Large scale is thinned substrate film coating and its processing technology |
| WO2020029579A1 (en) * | 2018-08-06 | 2020-02-13 | 信阳舜宇光学有限公司 | Optical filter and infrared image sensing system comprising same |
| US11828961B2 (en) | 2018-08-06 | 2023-11-28 | Xinyang Sunny Optics Co., Ltd. | Optical filter and infrared image sensing system including the same |
| CN110865433A (en) * | 2019-12-27 | 2020-03-06 | 江西水晶光电有限公司 | Optical filter for identifying fingerprints under screen and preparation method thereof |
| CN111323124A (en) * | 2020-04-02 | 2020-06-23 | 四川双利合谱科技有限公司 | Broadband hyperspectral camera with mounting structure and film coating method thereof |
| CN111323124B (en) * | 2020-04-02 | 2024-02-20 | 江苏双利合谱科技有限公司 | Broadband hyperspectral camera with mounting structure and film coating method thereof |
| CN113504666A (en) * | 2021-07-20 | 2021-10-15 | 武汉华星光电技术有限公司 | Display device |
| CN115166886A (en) * | 2022-06-14 | 2022-10-11 | 浙江晶驰光电科技有限公司 | Infrared cut-off filter with ultralow angle offset effect |
| CN115166886B (en) * | 2022-06-14 | 2024-02-09 | 浙江晶驰光电科技有限公司 | Infrared cut-off filter with ultralow angle offset effect |
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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: 20131113 Termination date: 20170531 |