CN102736153A - Infrared cut-off filter with low-angle effect - Google Patents
Infrared cut-off filter with low-angle effect Download PDFInfo
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- CN102736153A CN102736153A CN2012102311947A CN201210231194A CN102736153A CN 102736153 A CN102736153 A CN 102736153A CN 2012102311947 A CN2012102311947 A CN 2012102311947A CN 201210231194 A CN201210231194 A CN 201210231194A CN 102736153 A CN102736153 A CN 102736153A
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Abstract
The invention relates to a technical field of a filter, and more specifically relates to an infrared cut-off filter with a low-angle effect. The filter comprises a basement layer, and composite membrane layers are respectively coated on both side surfaces of the basement layer. High-index material films and low-index material films are alternatively formed the composite membrane layers. Compared with the filter in the prior art, the filter provided in the invention has the advantages of novelty and simple structure. According to the invention, using effects of blue glass basement is realized or approached by film coating. With the filter, production cost can be effectively reduced and using effect of the present ordinary infrared cut-off filter can be substantially improved. When the filter is used for light source inclination incidence or big cone angle incidence, not only center wavelength moves less but also spectrum curve can maintain good characteristics. With the filter, restriction is broken through, wherein the restriction is that the present infrared cut-off filter can not satisfy wide angle inclination incidence.
Description
[technical field]
The present invention relates to the optical filter technical field, specifically a kind of cutoff filter of low angle effect.
[background technology]
Cutoff filter is to utilize the precision optics coating technique on optical base-substrate, alternately to plate the blooming of high low-refraction; Realize that visible region (400-630nm) is thoroughly high; The optical filter that near infrared (700-11 00nm) ends; Be mainly used in digital image-forming fields such as camera mobile phone camera, computer built-in camera, automobile camera head, be used to eliminate the influence of IR the CCD/CMOS imaging.Through in imaging system, adding cutoff filter, stop that this part disturbs the infrared light of image quality, can make become image to meet the best perception of human eye more.Centre wavelength and cut off band width are to the angle of imaging system when realizing the incident of big vertebra angle; At present used the smalt substrate to be used to improve the angular effect of light source incident in the high-end field; But this cost of raw material is high; Processing technology is complicated, also is unfavorable at present on low-end product, popularizing in a large number.
[summary of the invention]
The object of the invention is exactly will solve above-mentioned deficiency and cutoff filter that a kind of low angle effect is provided, can effectively reduce cost and the result of use of obviously improving present common cutoff filter.
For realizing that above-mentioned purpose designs a kind of cutoff filter of low angle effect, comprise basalis, be coated with composite film on the two sides of said basalis respectively, said composite film is alternately formed by high-index material rete and low-index material rete.
Said high-index material rete is made up of in titania, five oxidation Tritanium/Trititaniums, zirconia, tantalum pentoxide, niobium pentaoxide, the zinc sulphide one or more, and said low-index material rete is made up of in silicon dioxide, magnesium fluoride, the alundum (Al one or more.
The composite film thickness of said basalis both sides is: 100～10000nm.
The present invention compares with prior art, and is simple in structure, novel, and the mode through plated film realizes or near the result of use of smalt substrate, can effectively reduce cost and the result of use of obviously improving present common cutoff filter.Not only centre wavelength moves less but also the curve of spectrum can keep good characteristic when optical filter is used for light source incline incident or the incident of big vertebra angle, the restriction when having broken through existing cutoff filter and can not satisfy wide-angle tilt incident.
[description of drawings]
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the spectrum effects figure of incident light under the big vertebra angle of the present cutoff filter that uses;
Fig. 3 is the spectrum effects figure of incident light under the big vertebra angle of cutoff filter of the present invention;
Among the figure: 1 is that basalis, 2 is that composite film, 3 is that high-index material rete, 4 is the low-index material rete.
[embodiment]
Further specify below below in conjunction with accompanying drawing the present invention being done:
Shown in accompanying drawing 1, the present invention includes and comprise basalis 1, be coated with composite film 2 on the two sides of said basalis 1 respectively, said composite film is alternately formed by high-index material rete 3 and low-index material rete 4.Said high-index material rete 3 is made up of in titania, five oxidation Tritanium/Trititaniums, zirconia, tantalum pentoxide, niobium pentaoxide, the zinc sulphide one or more, and said low-index material rete 4 is made up of in silicon dioxide, magnesium fluoride, the alundum (Al one or more.The composite film thickness of said basalis both sides is: 100～10000nm.
Production technology of the present invention: at first; Clear base bottom 1 surface; Then high-index material rete 3 and low-index material rete 4 are alternately covered on the basalis two sides, can material be covered up through modes such as heating evaporation or ionic bombardment or chemical precipitations.
Shown in accompanying drawing 2; The spectrum effects figure of incident light under the big vertebra angle for the present cutoff filter that uses; The wavelength shift that T50% is ordered when 0 degree incident and 30 degree incidents has reached 651-625=26nm; Promptly the spectrum change when 30 degree incidents is too big, and bigger variation also takes place color immediately during the CCD imaging, and image quality descends bigger.
Shown in accompanying drawing 3, be the spectrum effects figure of incident light under the big vertebra angle of cutoff filter of the present invention.Wherein one side through substrate adopt irregular film system make 50% o'clock less in 0 to 30 degree deviation ratio, another side can also can plate cut film by the coated with antireflection film, the range of control 100-10000nm of rete might realize.
The present invention does not receive the restriction of above-mentioned embodiment, and other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify, and all should be the substitute mode of equivalence, is included within protection scope of the present invention.
Claims (3)
1. the cutoff filter of a low angle effect comprises basalis, it is characterized in that: be coated with composite film on the two sides of said basalis respectively, said composite film is alternately formed by high-index material rete and low-index material rete.
2. the cutoff filter of low angle effect as claimed in claim 1; It is characterized in that: said high-index material rete is made up of in titania, five oxidation Tritanium/Trititaniums, zirconia, tantalum pentoxide, niobium pentaoxide, the zinc sulphide one or more, and said low-index material rete is made up of in silicon dioxide, magnesium fluoride, the alundum (Al one or more.
3. according to claim 1 or claim 2 the cutoff filter of low angle effect, it is characterized in that: the composite film thickness of said basalis both sides is: 100～10000nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102311947A CN102736153A (en) | 2012-07-05 | 2012-07-05 | Infrared cut-off filter with low-angle effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102311947A CN102736153A (en) | 2012-07-05 | 2012-07-05 | Infrared cut-off filter with low-angle effect |
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| CN102736153A true CN102736153A (en) | 2012-10-17 |
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| CN2012102311947A Pending CN102736153A (en) | 2012-07-05 | 2012-07-05 | Infrared cut-off filter with low-angle effect |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091759A (en) * | 2013-02-05 | 2013-05-08 | 李金宗 | Narrow-band interference filter |
| CN103116200A (en) * | 2013-02-05 | 2013-05-22 | 李金宗 | Adaptor system achieved based on narrow band interference filter and active marker |
| CN103853393A (en) * | 2014-02-19 | 2014-06-11 | 中国电子科技集团公司第五十五研究所 | Method for improving night vision performance of night vision compatible infrared touch screen |
| CN105549141A (en) * | 2016-01-22 | 2016-05-04 | 宁波永新光学股份有限公司 | Fluorescent optical filter assembly for medical examination system |
| CN106842402A (en) * | 2017-04-01 | 2017-06-13 | 东莞市微科光电科技有限公司 | A kind of method for designing of smalt optical 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 |
| CN107884858A (en) * | 2017-12-28 | 2018-04-06 | 南京理工大学 | Cutoff filter for Spectral beam combining |
| 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 |
| WO2021143204A1 (en) * | 2020-01-14 | 2021-07-22 | 华为技术有限公司 | Light-splitting flat panel, light-splitting device, light-splitting lens, camera, and electronic device |
| CN113777686A (en) * | 2021-08-20 | 2021-12-10 | 晋中学院 | Broadband all-dielectric low-emissivity film |
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| CN1764852A (en) * | 2003-03-24 | 2006-04-26 | 皇家飞利浦电子股份有限公司 | Lamp |
| CN101866063A (en) * | 2010-06-02 | 2010-10-20 | 温州医学院 | Resin lens having infrared-resisting function and preparation method thereof |
| CN202177716U (en) * | 2011-07-22 | 2012-03-28 | 浙江水晶光电科技股份有限公司 | Optical filter used for high pixel image system |
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2012
- 2012-07-05 CN CN2012102311947A patent/CN102736153A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764852A (en) * | 2003-03-24 | 2006-04-26 | 皇家飞利浦电子股份有限公司 | Lamp |
| CN101866063A (en) * | 2010-06-02 | 2010-10-20 | 温州医学院 | Resin lens having infrared-resisting function and preparation method thereof |
| CN202177716U (en) * | 2011-07-22 | 2012-03-28 | 浙江水晶光电科技股份有限公司 | Optical filter used for high pixel image system |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091759A (en) * | 2013-02-05 | 2013-05-08 | 李金宗 | Narrow-band interference filter |
| CN103116200A (en) * | 2013-02-05 | 2013-05-22 | 李金宗 | Adaptor system achieved based on narrow band interference filter and active marker |
| CN103091759B (en) * | 2013-02-05 | 2013-09-11 | 哈尔滨工业大学 | Narrow-band interference filter |
| CN103116200B (en) * | 2013-02-05 | 2013-10-02 | 哈尔滨工业大学 | Adaptor system achieved based on narrow band interference filter and active marker |
| CN103853393B (en) * | 2014-02-19 | 2017-01-11 | 中国电子科技集团公司第五十五研究所 | Method for improving night vision performance of night vision compatible infrared touch screen |
| CN103853393A (en) * | 2014-02-19 | 2014-06-11 | 中国电子科技集团公司第五十五研究所 | Method for improving night vision performance of night vision compatible infrared touch screen |
| CN105549141A (en) * | 2016-01-22 | 2016-05-04 | 宁波永新光学股份有限公司 | Fluorescent optical filter assembly for medical examination system |
| CN106842402A (en) * | 2017-04-01 | 2017-06-13 | 东莞市微科光电科技有限公司 | A kind of method for designing of smalt optical 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 |
| CN107884858A (en) * | 2017-12-28 | 2018-04-06 | 南京理工大学 | Cutoff filter for Spectral beam combining |
| 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 |
| WO2021143204A1 (en) * | 2020-01-14 | 2021-07-22 | 华为技术有限公司 | Light-splitting flat panel, light-splitting device, light-splitting lens, camera, and electronic device |
| EP4063940A4 (en) * | 2020-01-14 | 2023-01-18 | Huawei Technologies Co., Ltd. | Light-splitting flat panel, light-splitting device, light-splitting lens, camera, and electronic device |
| CN113777686A (en) * | 2021-08-20 | 2021-12-10 | 晋中学院 | Broadband all-dielectric low-emissivity film |
| CN113777686B (en) * | 2021-08-20 | 2024-03-19 | 晋中学院 | Broadband all-dielectric low-emissivity film |
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Application publication date: 20121017 |