CN103454707B - Camera optical filter and day and night camera - Google Patents

Camera optical filter and day and night camera Download PDF

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Publication number
CN103454707B
CN103454707B CN201310361479.7A CN201310361479A CN103454707B CN 103454707 B CN103454707 B CN 103454707B CN 201310361479 A CN201310361479 A CN 201310361479A CN 103454707 B CN103454707 B CN 103454707B
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China
Prior art keywords
camera
night
optical filter
day
sio
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Expired - Fee Related
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CN201310361479.7A
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Chinese (zh)
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CN103454707A (en
Inventor
徐小红
徐梦蔚
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JIAXING BRIGHT STAR OPTOELECTRONICS TECHNOLOGY Co Ltd
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JIAXING BRIGHT STAR OPTOELECTRONICS TECHNOLOGY Co Ltd
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Priority to CN201310361479.7A priority Critical patent/CN103454707B/en
Publication of CN103454707A publication Critical patent/CN103454707A/en
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Abstract

The present invention relates to a kind of camera filtering apparatus and there is its day and night camera.The camera includes matrix and the optical thin film in described matrix with optical filter, and the camera optical filter is formed with passband in visible region, and the camera optical filter is in infrared spectral range formed with narrow bandwidth window.The day and night camera, it is provided with the camera optical filter, is additionally provided with night supplementary lighting sources of the wavelength in the narrow bandwidth window.Camera optical filter provided by the invention, it passes through sets narrow bandwidth window in infrared spectral range so that it is suitable to day and night, and it is simple in construction, reliability is high.And day and night camera provided by the invention, then by setting the camera optical filter, and night supplementary lighting sources of the wavelength in narrow bandwidth window are provided with, make it that can there is preferable imaging effect on daytime and night.

Description

Camera optical filter and day and night camera
Technical field
The present invention relates to a kind of optical device, more particularly, to a kind of camera optical filter and has its day and night Camera.
Background technology
CMOS camera is widely used in monitoring safety-security area at present.Due to the characteristic of CMOS camera, in use, Optical filter must be installed additional before CMOS photoreceptors.At present, many CMOS cameras are mainly using double optical-filter switchers, double filters Mating plate switch includes a piece of cutoff filter, a piece of full impregnated spectral filter and dynamic structure.Double optical filter switchings Device makes cutoff filter work when daytime, light was abundant, and CMOS photoreceptors restore true color, when night not When sufficient, cutoff filter is set to remove automatically, full impregnated spectral filter is started working, and CMOS is made full use of all light Line, low shine performance so as to substantially increase.But during long-term use, due to the easy aged deterioration of dynamic structure, produce The system failure, make system cisco unity malfunction.Therefore, it is necessary to develop a day and night simple in construction, reliability is high Filtering apparatus and there is its camera.
The content of the invention
A kind of regarding the issue above, the present invention provides camera optical filter simple in construction, reliability is high And there is its day and night camera, solve the technical problem present in prior art.
To reach above-mentioned purpose, one aspect of the present invention employs following technical proposal：A kind of camera optical filter, it is wrapped Include matrix and the optical thin film in described matrix, the camera optical filter in visible region formed with passband, The camera optical filter is in infrared spectral range formed with narrow bandwidth window.
In above-mentioned camera optical filter, it is preferable that the wave-length coverage of the narrow bandwidth window is 803-827nm.
In above-mentioned camera optical filter, it is preferable that wavelength model of the camera optical filter in 400-640nm Light transmittance in enclosing is more than or equal to 50%.
In above-mentioned camera optical filter, it is preferable that point to described matrix direction from air, the optical thin film by The SiO of low-refraction2With the Ta of high index of refraction2O5It is alternatively formed.
In above-mentioned camera optical filter, it is preferable that point to described matrix direction, the optical thin film bag from air Include following film layer：
Film layer Film material Thicknesses of layers（nm） Film layer Film material Thicknesses of layers（nm）
1 SiO2 111.34 43 SiO2 180.92
2 Ta2O5 113.65 44 Ta2O5 113.69
3 SiO2 172.52 45 SiO2 164.55
4 Ta2O5 24.58 46 Ta2O5 115.13
5 SiO2 189.22 47 SiO2 160.99
6 Ta2O5 30.30 48 Ta2O5 113.07
7 SiO2 169.48 49 SiO2 157.54
8 Ta2O5 79.99 50 Ta2O5 113.91
9 SiO2 140.53 51 SiO2 155.62
10 Ta2O5 77.98 52 Ta2O5 113.31
11 SiO2 135.23 53 SiO2 155.38
12 Ta2O5 83.19 54 Ta2O5 112.98
13 SiO2 125.67 55 SiO2 155.15
14 Ta2O5 89.35 56 Ta2O5 112.75
15 SiO2 120.04 57 SiO2 154.68
16 Ta2O5 91.11 58 Ta2O5 113.02
17 SiO2 120.40 59 SiO2 154.07
18 Ta2O5 89.87 60 Ta2O5 113.09
19 SiO2 123.18 61 SiO2 154.15
20 Ta2O5 88.26 62 Ta2O5 112.85
21 SiO2 124.27 63 SiO2 154.53
22 Ta2O5 88.68 64 Ta2O5 112.68
23 SiO2 122.27 65 SiO2 154.46
24 Ta2O5 90.35 66 Ta2O5 113.12
25 SiO2 119.92 67 SiO2 153.90
26 Ta2O5 90.78 68 Ta2O5 113.50
27 SiO2 120.97 69 SiO2 154.19
28 Ta2O5 87.67 70 Ta2O5 113.39
29 SiO2 127.08 71 SiO2 155.00
30 Ta2O5 81.85 72 Ta2O5 113.46
31 SiO2 135.64 73 SiO2 155.00
32 Ta2O5 74.95 74 Ta2O5 115.08
33 SiO2 143.08 75 SiO2 153.10
34 Ta2O5 72.73 76 Ta2O5 116.81
35 SiO2 159.06 77 SiO2 155.54
36 Ta2O5 44.30 78 Ta2O5 117.19
37 SiO2 159.58 79 SiO2 156.94
38 Ta2O5 79.96 80 Ta2O5 125.66
39 SiO2 151.77 81 SiO2 150.43
40 Ta2O5 242.27 82 Ta2O5 120.51
41 SiO2 249.25 83 SiO2 79.58
42 Ta2O5 141.17
In above-mentioned camera optical filter, it is preferable that the side of described matrix has the optical thin film.
Another aspect of the present invention employs following technical proposal：A kind of day and night camera, it is provided with any of the above-described Camera optical filter described in embodiment, it is additionally provided with night supplementary lighting sources of the wavelength in the narrow bandwidth window.
In above-mentioned day and night camera, it is preferable that the night supplementary lighting sources are semiconductor laser.
Camera optical filter provided by the invention, it in infrared spectral range by setting narrow bandwidth window so that it is suitable In day and night, and it is simple in construction, reliability is high.And day and night camera provided by the invention, then by described in setting Camera optical filter, and be provided with night supplementary lighting sources of the wavelength in narrow bandwidth window, make its daytime and night all There can be preferable imaging effect.
Brief description of the drawings
Fig. 1 is the structural representation of the camera optical filter of the embodiment of the present invention.
Fig. 2 is the spectrum character diagram of the camera optical filter of the embodiment of the present invention.
Embodiment
Fig. 1 and Fig. 2 are refer to, the embodiment of the present invention provides a kind of camera optical filter, and it includes matrix 11 and is located at Optical thin film 12 on matrix 11.By setting the optical thin film 12, make camera optical filter shape in visible region Into there is passband, and formed with narrow bandwidth window in infrared spectral range.
In a preferred embodiment, the wave-length coverage of narrow bandwidth window is 803-827nm.In the present embodiment, narrow bandwidth The peak of window is located at 815nm, half a width of 12nm of narrow bandwidth window, is that its light transmittance reaches 85% at 815nm in wavelength.
In a preferred embodiment, the camera is more than with light transmittance of the optical filter in 400-640nm wave-length coverage Or equal to 50%.In the present embodiment, the camera is more than with light transmittance of the optical filter in 405-625nm wave-length coverage 80%。
Specifically, from air point to matrix 11 direction in terms of, optical thin film 12 by low-refraction SiO2Reflected with height The Ta of rate2O5It is alternatively formed.Further, after matrix 11 is about 1mm, its side has optical thin film 12.The optical thin film 12 It can be plated to by way of evaporation on matrix 11.
In a preferred embodiment, the direction of matrix 11 is pointed to from air, optical thin film 12 includes film layer as shown in the table：
Camera optical filter described in above-described embodiment has spectral characteristic as shown in Figure 2.
The embodiment of the present invention also provides a kind of day and night camera, and it is provided with according to any of the above-described embodiment Camera optical filter, it is additionally provided with night supplementary lighting sources of the wavelength in narrow bandwidth window.
When daytime is bright and clear, night supplementary lighting sources are closed, because camera optical filter has in visible region There is wider passband, therefore the day and night camera has relatively good color rendition.And at night, night supplementary lighting sources Open, because the wavelength of night supplementary lighting sources is located in narrow bandwidth window, therefore have enough light filling intensity during night vision, so that Remain to preferably be imaged during night.
In a preferred embodiment, night supplementary lighting sources are semiconductor laser.
Camera optical filter provided by the invention, it in infrared spectral range by setting narrow bandwidth window so that it is suitable In day and night, and it is simple in construction, reliability is high.And day and night camera provided by the invention, then by described in setting Camera optical filter, and be provided with night supplementary lighting sources of the wavelength in narrow bandwidth window, make its daytime and night all There can be preferable imaging effect.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used the terms such as matrix, passband, narrow bandwidth window herein, it is not precluded from using other terms Possibility.It is used for the purpose of more easily describing and explaining the essence of the present invention using these terms；It is construed as appointing A kind of what additional limitation is all disagreed with spirit of the present invention.

Claims (3)

1. a kind of camera optical filter, it includes matrix and the optical thin film in described matrix, the camera filter Mating plate is in visible region formed with passband, it is characterised in that the camera is formed with optical filter in infrared spectral range Have narrow bandwidth window, described matrix direction pointed to from air, the optical thin film by low-refraction SiO2With high index of refraction Ta2O5It is alternatively formed；And described matrix direction is pointed to from air, the optical thin film includes following film layer:
A kind of 2. day and night camera, it is characterised in that camera optical filter according to claim 1 is provided with, It is additionally provided with night supplementary lighting sources of the wavelength in the narrow bandwidth window.
3. day and night camera according to claim 2, it is characterised in that the night supplementary lighting sources swash for semiconductor Light.
CN201310361479.7A 2013-08-19 2013-08-19 Camera optical filter and day and night camera Expired - Fee Related CN103454707B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN103454707B true CN103454707B (en) 2017-12-26

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105891928B (en) * 2016-04-29 2018-06-12 杭州科汀光学技术有限公司 A kind of camera shooting wave filter of day and night dual-purpose
CN107254665A (en) * 2017-06-13 2017-10-17 深圳市鼎新光电有限公司 A kind of plating method of new day and night type product
CN109991794A (en) * 2017-12-30 2019-07-09 陈啸 Camera optical filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006023471A (en) * 2004-07-07 2006-01-26 Olympus Corp Multilayer minus filter and fluorescence microscope
CN101424759A (en) * 2008-12-01 2009-05-06 杭州科汀光学技术有限公司 High-frequency wave pass/cut filter of ultrawide cut-off region
CN102334049A (en) * 2009-09-15 2012-01-25 株式会社大真空 Optical filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006023471A (en) * 2004-07-07 2006-01-26 Olympus Corp Multilayer minus filter and fluorescence microscope
CN101424759A (en) * 2008-12-01 2009-05-06 杭州科汀光学技术有限公司 High-frequency wave pass/cut filter of ultrawide cut-off region
CN102334049A (en) * 2009-09-15 2012-01-25 株式会社大真空 Optical filter

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