CN1133870C - Light filter - Google Patents
Light filter Download PDFInfo
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- CN1133870C CN1133870C CNB011059842A CN01105984A CN1133870C CN 1133870 C CN1133870 C CN 1133870C CN B011059842 A CNB011059842 A CN B011059842A CN 01105984 A CN01105984 A CN 01105984A CN 1133870 C CN1133870 C CN 1133870C
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- optical filter
- filter
- convergent mirror
- optical
- convergent
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Abstract
The present invention relates to a filter device which is sequentially composed of filters, a convergent mirror and a diaphragm in an incident light direction. The present invention is characterized in that the first filter is perpendicular to a principal optic axis; the second filter and the filters behind the second filter are parallel to one another and form an angle of theta in inclination with the first filter so that 2*theta*f2 is greater than r, wherein f2 is the focal length of the convergent mirror, and r is the radius of the diaphragm. The present invention has the advantages of favorable light filtering performance, simple structure and convenient installation and use.
Description
Technical field
The present invention relates to filtering apparatus, particularly a kind of filtering apparatus of many optical filters.
Background technology
In the confocal fluorescent detection system, must add optical filter and get rid of exciting light, allow fluorescence see through.Because the fluorescence intensity ratio excitating light strength is much lower, when optical filter is not enough to filter exciting light, has only the way of changing the higher optical filter of performance and can not adopting the multiple optical filters stack usually.As shown in Figure 1,1. exciting light shines optical filter 1, antireflection part, and transmission part exciting light is 2..Though optical filter 2 has further filtration, 3. the exciting light that reflects through optical filter 2 can be reflected by optical filter 1, has been equivalent to increase the exciting light of directive optical filter 2, causes seeing through the exciting light of optical filter 2 so 5. unlike seeing through the how much few of optical filter 1.In high performance device, adopt interference filter usually, its spectral characteristic is better, but also has the characteristics that non-transmission is promptly reflected, and especially is unfavorable for the situation as Fig. 1 structure.
Summary of the invention
The objective of the invention is provides a kind of filtering apparatus, to increase substantially its optical filtering performance in order to overcome the influence of reflection exciting light mutually between the many optical filters of above-mentioned prior art.
The object of the present invention is achieved like this.
A kind of filtering apparatus, be made up of polylith (〉=2) optical filter, convergent mirror and light hurdle successively along incident light (primary optical axis) direction, its characteristics are first optical filter perpendicular to primary optical axis, and second optical filter and all later optical filters thereof are parallel to each other, and, make with first optical filter angle θ that tilts
2θ×f2＞r
Wherein: f2---the convergent mirror focal length
The radius of r---pin hole
Said optical filter number is 2;
After the light hurdle, second convergent mirror can also be installed, the focal length of this second convergent mirror is identical with the focal length of first convergent mirror, and focus overlaps the said smooth hurdle of installation on the focus that overlaps between two convergent mirrors.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the filtering apparatus optical filtering schematic diagram of the many optical filter stacks of prior art.
Fig. 2 is a filtering apparatus fundamental diagram of the present invention.
Fig. 3 is the general structural representation of filtering apparatus of the present invention.
Embodiment
See also Fig. 2, filtering apparatus of the present invention, form by first optical filter 1, second optical filter 2, convergent mirror 3, light hurdle or pin hole 4 successively from left to right along incident light (primary optical axis) direction, be characterized in that first optical filter 1 is perpendicular to primary optical axis, and second optical filter 2 and first optical filter 1 are not parallel, promptly no longer vertical primary optical axis, its normal direction and the primary optical axis angle θ that tilts makes 2 θ * f2＞r
In the formula: f2 is the focal length of convergent mirror 3, and r is the radius of light hurdle or pin hole 4.
Therefore, 1. exciting light shines optical filter 1, antireflection part transmission part exciting light 2., 3. the exciting light of optical filter 2 reflections is 2 θ with the primary optical axis deviation angle, 4. the exciting light that is reflected by optical filter 1 still departs from 2 θ with primary optical axis, the exciting light that sees through optical filter 1 so 2. after filtration mating plate 2 further filter, have only very little a part of exciting light 6. to see through, and be received, and 5. depart from 2 θ with primary optical axis through the exciting light of reflecting ﹠ transmitting optical filter 2, as convergent mirror 3 focal lengths is f2, and then 6. exciting light can depart from pin hole or light hurdle 4, is focused at the place apart from primary optical axis 2 θ * f2.If select parameter to make 2 θ * f2＞r.
Wherein r is the radius on pin hole or light hurdle.5. exciting light just can not be received so.Wherein, pin hole is exactly the less light hurdle of through hole.
With GeneEyes 2000 is example, r=50um, and f2=40mm just can make the light-filtering characteristic of two tablet filters play a role fully as long as get θ＞0.625mrad.Such as 1,2 pairs of exciting light transmissivities of optical filter all is 10
-3, then as shown in Figure 2 structure can reach transmitance 10 in theory
-6
The stack of more if desired optical filters, as long as optical filter 1 is vertical with primary optical axis, optical filter 2 and all the optical filter i more than the back are parallel to each other, as shown in Figure 3, and with optical filter 1 deflection θ angle, make 2 θ * f2＞r get final product.
If need pin hole or light hurdle in the former design, add that then pin hole or light hurdle get final product.
1,2 if need converging ray in the former design, then as shown in Figure 3, among the figure: ... i ... be optical filter, 3,5 is convergent mirror, and 4 is light hurdle or pin hole.Two convergent mirrors, 3,5 focal lengths are identical, and optical axis is parallel, and focus overlaps between two convergent mirrors 3,5, and light hurdle 4 is installed on the focus that overlaps.
In sum, filtering apparatus of the present invention has the performance that filters preferably to exciting light, and has characteristics such as simple in structure, easy for installation.
Claims (3)
1, a kind of filtering apparatus, along the incident light direction successively by optical filter (1,2 ... i ...), convergent mirror (3) He Guanglan (4) forms, it is characterized in that first optical filter (1) is perpendicular to primary optical axis, second optical filter (2) and later all optical filters (i) thereof are parallel to each other, and, make with first optical filter (1) inclination, one angle θ
2θ×f2＞r
Wherein: f2---the convergent mirror focal length
The radius on r---pin hole or light hurdle
2, filtering apparatus according to claim 1 is characterized in that said optical filter number only is 2.
3, filtering apparatus according to claim 1, it is characterized in that afterwards at Guang Lan (4), also has one second convergent mirror (5), the focal length of this second convergent mirror (5) is identical with the focal length of first convergent mirror (3), and focus overlaps installation said smooth hurdle (4) on the focus that overlaps between two convergent mirrors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011059842A CN1133870C (en) | 2001-04-13 | 2001-04-13 | Light filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011059842A CN1133870C (en) | 2001-04-13 | 2001-04-13 | Light filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1311429A CN1311429A (en) | 2001-09-05 |
| CN1133870C true CN1133870C (en) | 2004-01-07 |
Family
ID=4655043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011059842A Expired - Fee Related CN1133870C (en) | 2001-04-13 | 2001-04-13 | Light filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1133870C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589694B (en) * | 2012-02-02 | 2014-02-26 | 麦克奥迪实业集团有限公司 | Device for acquiring multispectral microscopic image |
| CN105814417B (en) * | 2013-12-13 | 2018-06-08 | 柯尼卡美能达株式会社 | Spectrophotometric unit and the light-dividing device using the spectrophotometric unit |
| CN105352596B (en) * | 2015-12-09 | 2017-12-29 | 广州江元医疗科技有限公司 | Monochromatic optical acquisition device |
-
2001
- 2001-04-13 CN CNB011059842A patent/CN1133870C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1311429A (en) | 2001-09-05 |
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| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
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| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT INVENTOR; FROM: DENG HUI; FENG ZHEMIN; CHEN DAPANG; TO: SHAO HUI; FENG ZHEMIN; CHEN DAPANG Effective date: 20010803 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20010803 Inventor after: Shao Hui Feng Inventor after: Zhemin Inventor after: Chen Dapang Inventor before: Deng Hui Inventor before: Feng Zhemin Inventor before: Chen Dapang |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Owner name: BEIJING JUYUAN CHUANGXIN INDUSTRY CO., LTD. Free format text: FORMER OWNER: AIPUTE INSTRUMENT CO., LTD., SHANGHAI Effective date: 20040514 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040514 Address after: 100013 Beijing city Chaoyang District North Third Ring Road No. 12 Wanji source building room 5018 Patentee after: Beijing Juyuan Innovation Industry Co., Ltd. Address before: 24, 200437, Bai Shu Building, No. 1230, North First Road, Shanghai, Zhongshan Patentee before: Shanghai Aipute Instrument Co., Ltd. |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |