CN104849790A - Infrared cut-off filter - Google Patents
Infrared cut-off filter Download PDFInfo
- Publication number
- CN104849790A CN104849790A CN201510301203.9A CN201510301203A CN104849790A CN 104849790 A CN104849790 A CN 104849790A CN 201510301203 A CN201510301203 A CN 201510301203A CN 104849790 A CN104849790 A CN 104849790A
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- CN
- China
- Prior art keywords
- filter
- cutoff filter
- rectangular
- framework
- cutoff
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 13
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 11
- 229920002799 BoPET Polymers 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Blocking Light For Cameras (AREA)
Abstract
The invention provides an infrared cut-off filter, and belongs to the technical field of optics. The problem that the load on the motor of the existing filter increases severely, the driving voltage rises, the static retention is low and the stability of the filter is poor due to the fact that the filter is thick and heavy is solved. The infrared cut-off filter comprises a frame of which the middle is provided with a rectangular through hole composed of a light passing part and a light filtering part, and the light passing part and the light filtering part are symmetrically arranged along the centerline of the long edges of the rectangular through hole. An IR cut-off filter used for absorbing ultraviolet and infrared rays is adhered to one side of the frame, the IR cut-off filter covers the light filtering part, one edge of the IR cut-off filter overlaps with the centerline of the long edges of the rectangular through hole, and the thickness of the IR cut-off filter is 0.1mm. The infrared cut-off filter of the invention has the advantages of being light, capable of better processing ultraviolet and infrared rays, more convenient to manufacture, and the like.
Description
Technical field
The invention belongs to optical technical field, relate to a kind of optical filter, particularly a kind of cutoff filter.
Background technology
Thermal camera is a kind of common electronic monitoring equipment, and the front end of its camera lens case is provided with optical filter.In common thermal camera, optical filter only has one piece, this thermal camera in the course of the work, easily be subject to the interference of occurring in nature infrared light sources daytime and cause the problem of CCD imaging colour cast, evening, result of use was unsatisfactory then because of visible ray disturbing effect shooting effect.In order to all obtain good image under lamp and infrared light supply, someone adopts the mode of the optical filter that day and night automatically switches: by day, and optical filter is switched to the pattern of cut-off infrared light, prevents entering of infrared light; At night, optical filter is switched to the infrared pattern of sense, makes to occur better shooting effect night.
In order to realize the automatic switchover of optical filter, existing way is the switching device shifter arranging infrared fileter in video camera, it mainly comprises slide, is located at the optical filter on slide and drives optical filter along the CD-ROM drive motor of slide movement, by day cutoff filter is switched to photosensitive sites, be switched to photosensitive sites by infrared by optical filter in the evening.Wherein optical filter is made up of framework and the filter glass be located in framework.
The framework of existing optical filter is by injection molding, and thickness is greater than 0.3mm, and weight is greater than 0.06g, the thickness of filter glass is greater than 0.21mm, and weight is greater than 0.03g, after forming optical filter, overall weight is greater than 0.1g, seriously increases the load of motor, causes driving voltage to raise; Overall weight is heavier, and static retention forces is lower, and stableness of filter is poor; The purplish red outside line that glass is entered by reflection mode process, reflection ray disturbs the light entered, and causes imaging effect poor; And when dropping or be subject to impacting, glass is very easily broken, need to change it, troublesome poeration.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of lightweight, purple infra red treatment obtained better, manufacture cutoff filter more easily.
Object of the present invention realizes by following technical proposal:
This cutoff filter, comprise framework, the middle part of described framework is provided with the rectangular through-hole be made up of logical light part and optical filtering part, described logical light part and optical filtering part are symmetrical arranged along the long limit center line of rectangular through-hole, it is characterized in that, the side of described framework has been sticked for absorbing purple ultrared IR cutoff filter, described IR cutoff filter is covered in filter unit office and an edge of this IR cutoff filter overlaps with the long limit center line of rectangular through-hole, and the thickness of described IR cutoff filter is 0.1mm.IR cutoff filter is that the mode by absorbing purplish red UV light carries out filtering, and the light of absorption can not produce interference to the light entered, and can improve imaging effect.
In above-mentioned cutoff filter, described IR cutoff filter adopts PET material to make.Relative to the thickness of the IR cutoff filter 0.21mm of glass material, the thickness of the IR cutoff filter that PET makes can be thinned to 0.1mm, and relative to the weight of glass material 0.03g, the weight of the IR cutoff filter of PET gently can arrive 0.01g.
In above-mentioned cutoff filter, the thickness of described framework is 0.1mm.
In above-mentioned cutoff filter, described framework adopts PET film impact briquetting.Be difficult to thickness lower than 0.3mm and 0.06g weight relative to plastics material frame, adopt the thickness of the stamping forming framework of PET film to reach 0.1mm, weight only has 0.01g.Make lighter overall weight by the assembling of framework and IR cutoff filter, the load on motor reduces, and driving voltage declines, and static retention forces uprises, good stability.
In above-mentioned cutoff filter, the side that described framework is positioned at IR cutoff filter has also been sticked AR optical filter, and described AR optical filter is covered in logical light part place and an edge of this AR optical filter overlaps with the long limit center line of rectangular through-hole.
In above-mentioned cutoff filter, the thickness of described AR optical filter is 0.1mm.
In above-mentioned cutoff filter, described AR optical filter adopts PET material to make.
In above-mentioned cutoff filter, described AR optical filter is rectangular, and described IR cutoff filter is rectangular, described AR optical filter and the equal and opposite in direction of IR cutoff filter.
In above-mentioned cutoff filter, described framework has with framework integrated tractive unit, described tractive unit has towing pad.
Compared with prior art, this cutoff filter has the following advantages:
IR cutoff filter becomes the thickness of 0.1mm from the thickness of original 0.21mm, weight also becomes 0.01g from 0.03g, framework becomes the thickness of 0.1mm from the thickness of original 0.3mm, weight also becomes 0.01g from 0.06g, make entirety thinner lighter after assembling, the load on motor reduces, and driving voltage declines, static retention forces uprises, good stability; IR cutoff filter is that the mode by absorbing purplish red UV light carries out filtering, and the light of absorption can not produce interference to the light entered, and can improve imaging effect; The IR cutoff filter be made up of PET material, can not be broken when dropping or be subject to impacting, and has more permanent serviceable life.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of preferred embodiment provided by the invention.
Fig. 2 is the exploded perspective view of a kind of preferred embodiment provided by the invention.
Fig. 3 is the cut-open view of a kind of preferred embodiment provided by the invention.
In figure, 1, framework; 10, long limit center line; 11, logical light part; 12, optical filtering part; 13, tractive unit; 14, towing pad; 2, IR cutoff filter; 3, AR optical filter.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Cutoff filter as shown in Figure 1, comprise framework 1, the middle part of framework 1 is provided with the rectangular through-hole be made up of with optical filtering part 12 logical light part 11, as shown in Figure 2, logical light part 11 is symmetrical arranged with the long limit center line 10 of optical filtering part 12 along rectangular through-hole, as shown in Figure 1, the side of framework 1 has been sticked for absorbing purple ultrared IR cutoff filter 2, IR cutoff filter 2 is covered in optical filtering part 12 place and an edge of this IR cutoff filter 2 overlaps with the long limit center line 10 of rectangular through-hole, the thickness of IR cutoff filter 2 is 0.1mm, IR cutoff filter 2 is that the mode by absorbing purplish red UV light carries out filtering, the light absorbed can not produce interference to the light entered, imaging effect can be improved.
In the present embodiment, IR cutoff filter 2 adopts PET material to make, relative to the thickness of the IR cutoff filter 20.21mm of glass material, the thickness of the IR cutoff filter 2 that PET makes can be thinned to 0.1mm, relative to the weight of glass material 0.03g, the weight of the IR cutoff filter 2 of PET gently can arrive 0.01g.
In the present embodiment, framework 1 adopts PET film impact briquetting, and the thickness of framework 1 is 0.1mm, relative to the very difficult thickness lower than 0.3mm of plastics material frame 1 and 0.06g weight, adopt the thickness of the stamping forming framework 1 of PET film to reach 0.1mm, weight only has 0.01g.As shown in Figure 3, make lighter overall weight by framework 1 and the assembling of IR cutoff filter 2, the load on motor reduces, and driving voltage declines, and static retention forces uprises, good stability.
As depicted in figs. 1 and 2, the side that framework 1 is positioned at IR cutoff filter 2 AR optical filter 3, the AR optical filter 3 that has also been sticked is covered in logical light part 11 place and an edge of this AR optical filter 3 overlaps with the long limit center line 10 of rectangular through-hole.
In the present embodiment, the thickness of AR optical filter 3 is 0.1mm, and AR optical filter 3 adopts PET material to make.
As depicted in figs. 1 and 2, AR optical filter 3 is rectangular, and IR cutoff filter 2 is rectangular, the equal and opposite in direction of AR optical filter 3 and IR cutoff filter 2.
As depicted in figs. 1 and 2, framework 1 having the integrated tractive unit 13 with framework 1, tractive unit 13 having towing pad 14, for being connected with motor.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. a cutoff filter, comprise framework (1), the middle part of described framework (1) is provided with the rectangular through-hole be made up of with the part (12) that filters logical light part (11), described logical light part (11) is symmetrical arranged with long limit center line (10) of part (12) along rectangular through-hole of filtering, it is characterized in that, the side of described framework (1) has been sticked for absorbing purple ultrared IR cutoff filter (2), described IR cutoff filter (2) is covered in optical filtering part (12) place and an edge of this IR cutoff filter (2) overlaps with long limit center line (10) of rectangular through-hole, the thickness of described IR cutoff filter (2) is 0.1mm.
2. cutoff filter according to claim 1, is characterized in that, described IR cutoff filter (2) adopts PET material to make.
3. cutoff filter according to claim 1, is characterized in that, the thickness of described framework (1) is 0.1mm.
4. cutoff filter according to claim 3, is characterized in that, described framework (1) adopts PET film impact briquetting.
5. cutoff filter according to claim 1, it is characterized in that, the side that described framework (1) is positioned at IR cutoff filter (2) has also been sticked AR optical filter (3), and described AR optical filter (3) is covered in logical light part (11) place and an edge of this AR optical filter (3) overlaps with long limit center line (10) of rectangular through-hole.
6. cutoff filter according to claim 5, is characterized in that, the thickness of described AR optical filter (3) is 0.1mm.
7. cutoff filter according to claim 6, is characterized in that, described AR optical filter (3) adopts PET material to make.
8. the cutoff filter according to claim 5 or 6 or 7, is characterized in that, described AR optical filter (3) is rectangular, and described IR cutoff filter (2) is rectangular, the equal and opposite in direction of described AR optical filter (3) and IR cutoff filter (2).
9. cutoff filter according to claim 1, is characterized in that, described framework (1) has and framework (1) integrated tractive unit (13), and described tractive unit (13) has towing pad (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510301203.9A CN104849790A (en) | 2015-06-05 | 2015-06-05 | Infrared cut-off filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510301203.9A CN104849790A (en) | 2015-06-05 | 2015-06-05 | Infrared cut-off filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104849790A true CN104849790A (en) | 2015-08-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510301203.9A Pending CN104849790A (en) | 2015-06-05 | 2015-06-05 | Infrared cut-off filter |
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| Country | Link |
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| CN (1) | CN104849790A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070154208A1 (en) * | 2005-12-30 | 2007-07-05 | Ming-Tsun Chen | Light-filtering module for an image-capturing device |
| WO2013120255A1 (en) * | 2012-02-14 | 2013-08-22 | Wang Huizhi | Optical filter switcher |
| CN103487862A (en) * | 2013-09-29 | 2014-01-01 | 温岭市现代晶体有限公司 | Optical filter |
| CN103605175A (en) * | 2013-11-28 | 2014-02-26 | 温岭市现代晶体有限公司 | Light filter |
| CN203773214U (en) * | 2014-03-14 | 2014-08-13 | 东莞市维斗电子有限公司 | Double-optical-filter IR-CUT switching device |
| CN204650012U (en) * | 2015-06-05 | 2015-09-16 | 温岭市现代晶体有限公司 | Cutoff filter |
-
2015
- 2015-06-05 CN CN201510301203.9A patent/CN104849790A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070154208A1 (en) * | 2005-12-30 | 2007-07-05 | Ming-Tsun Chen | Light-filtering module for an image-capturing device |
| WO2013120255A1 (en) * | 2012-02-14 | 2013-08-22 | Wang Huizhi | Optical filter switcher |
| CN103487862A (en) * | 2013-09-29 | 2014-01-01 | 温岭市现代晶体有限公司 | Optical filter |
| CN103605175A (en) * | 2013-11-28 | 2014-02-26 | 温岭市现代晶体有限公司 | Light filter |
| CN203773214U (en) * | 2014-03-14 | 2014-08-13 | 东莞市维斗电子有限公司 | Double-optical-filter IR-CUT switching device |
| CN204650012U (en) * | 2015-06-05 | 2015-09-16 | 温岭市现代晶体有限公司 | Cutoff filter |
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| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |