CN204650012U

CN204650012U - Cutoff filter

Info

Publication number: CN204650012U
Application number: CN201520379224.8U
Authority: CN
Inventors: 葛文志; 矢島大和; 钱江
Original assignee: Wenling City Modern Crystal Co Ltd
Current assignee: Zhejiang modern medice optoelectronics Co. Ltd.
Priority date: 2015-06-05
Filing date: 2015-06-05
Publication date: 2015-09-16
Anticipated expiration: 2025-06-05

Abstract

The utility model provides a kind of cutoff filter, belongs to optical technical field.It solve existing optical filter and have larger thickness and heavier weight, seriously increase the load of motor, cause driving voltage to raise, static retention forces is lower, the problem that stableness of filter is poor.This cutoff filter, comprise framework, the middle part of framework is provided with the rectangular through-hole be made up of logical light part and optical filtering part, logical light part and optical filtering part are symmetrical arranged along the long limit center line of rectangular through-hole, the side of framework has been sticked for absorbing purple ultrared IR cutoff filter, 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 IR cutoff filter is 0.1mm.The utility model have lightweight, purple infra red treatment is obtained better, manufactures the advantages such as more convenient.

Description

Cutoff filter

Technical field

The utility model belongs to optical technical field, relates 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 purpose of this utility model 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.

The purpose of this utility model 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 that the utility model provides.

Fig. 2 is the exploded perspective view of a kind of preferred embodiment that the utility model provides.

Fig. 3 is the cut-open view of a kind of preferred embodiment that the utility model provides.

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 embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model 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 utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.

Claims

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).