CN202267756U - 45 degrees Raman long wave pass optical filter - Google Patents
45 degrees Raman long wave pass optical filter Download PDFInfo
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- CN202267756U CN202267756U CN2011204012866U CN201120401286U CN202267756U CN 202267756 U CN202267756 U CN 202267756U CN 2011204012866 U CN2011204012866 U CN 2011204012866U CN 201120401286 U CN201120401286 U CN 201120401286U CN 202267756 U CN202267756 U CN 202267756U
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- raman
- refractive index
- long wave
- wave pass
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Abstract
The present utility model discloses a 45 degrees Raman long wave pass optical filter which belongs to an optical device. The long wave pass optical filter comprises a substrate, and a plurality of high refractive index films and low refractive index films which is arranged on the substrate in an alternative and overlapping way, and the number of layers of the overlapped high refractive index films and the low refractive index films is 180 to 250. On the basis of the prior product, the thickness of the films is increased, thus cut-off depth can be increased, transitive area gradient can be enhanced, and small Raman displacement can be measured, and Raman scattering optical wave can be better extracted as the cut-off depth and penetration rate are enhanced. Raman optical wave can be easily distinguished when the penetration rate is higher, and qualified rate of products can be enhanced.
Description
Technical field
The utility model relates to a kind of optical filter, refers in particular to a kind of medical domain that is used for and distinguishes whether 45 degree Raman long wave pass filters of canceration of cell.
Background technology
What is at first simply had a talk about is Raman spectrum.Raman spectrum is that India scientist C.V.Raman at first found in CCl4 spectrum in nineteen twenty-eight; When a branch of light incides on the sample; In the scattered light that receives, measure except the light identical with the incident light frequency; Also find the light have some frequencies to change simultaneously, the frequency of this part variation is relevant with the structure of matter, so this effect called after Raman (Raman) effect.Raman scattering is an inelastic scatter, and in this process, photon is by material molecule or lattice scattering, and change has taken place energy.The variation of this energy has characterized the characteristic of molecule and chemical bond, has embodied the architectural feature of material, and its concrete manifestation form is exactly Raman shift.Thereby people call Raman spectrum in " fingerprint " of material.Raman spectroscopy is with its abundant information, and sample preparation is simple, to unique advantages such as sample not damageds, is widely used in fields such as chemistry, material, physics, macromolecule, biology, medicine, geology.
Please refer to shown in Figure 1ly, be used for the optical schematic diagram of medical domain in order to the explanation Raman spectroscopy, laser wavelength of incidence is λ among the figure
0, through filtering out the light wave of its all band behind the 0 degree narrow band pass filter 1.After long pass filter 2 reflections, incide and survey object 3 through 45 degree; Reflection produces Raman scattering if detection of cells has the pathology of appearance, and the light wave of 2 wavelength appears in reflected light, and wherein major part is λ
0, also have a spot of λ '.λ ' is the light wave of sick cell reflection, is our required signals detected.Also has a spot of λ through the long pass filter of 45 degree after 2 preliminary isolation
0Light wave incides on the long pass filter 3 of 0 degree with λ ' light wave.The light wave of isolating the back outgoing through the long pass filter 3 of 0 degree of high-isolation basically all is λ ' light wave (the high more signal accuracy that obtains of isolation is high more).And in the prior art, the high refractive index layer that 0 degree Raman long wave pass filter sets gradually on substrate and the thickness of low-index film are generally the 130-150 layer, have following problem: excessively be with slope not high enough, the not small Raman shift of energy measurement; Transmitance is not high enough; Low by the degree of depth, can not end former light wave fully.
Summary of the invention
The utility model purpose is to provide a kind of 45 degree Raman long wave pass filters; Increase thicknesses of layers; Increase by the degree of depth to reach, improve excessive band slope, be beneficial to the purpose of measuring little Raman shift, thereby the operation wavelength that can guarantee product is enough accurate; Improve transmitance, also can improve the qualification rate of product simultaneously.
In order to realize above-mentioned utility model purpose; The technical scheme that the utility model adopted is: a kind of 45 degree Raman long wave pass filters; Comprise substrate; Replace overlapping plural layer high refractive index layer and the low-index film of being located on the substrate, the number of plies after said high refractive index layer and the low-index film stack is the 180-250 layer.
Further, said high refractive index layer is processed by high-index material, and said low-index film is processed by low-index material.
The beneficial effect of the utility model is: on the basis of existing product; Increase thicknesses of layers, increase by the degree of depth, improve excessive band slope, be beneficial to the purpose of measuring little Raman shift to reach; By the raising of the degree of depth, can better extract the Raman scattering light wave with transmitance.See through the high more Raman light wave of telling more easily, also can improve the qualification rate of product simultaneously.
Description of drawings
Fig. 1 is the optical schematic diagram of background technology;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is that the utility model and prior art see through the curve map that effect compares.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, the utility model is done further to specify below in conjunction with accompanying drawing and embodiment.
Please refer to shown in Figure 2; A kind of 45 degree Raman long wave pass filters; Comprise substrate 21; Replace overlapping plural layer high refractive index layer 22 and the low-index film of being located on the substrate 21 23, the number of plies after said high refractive index layer 22 and low-index film 23 stacks is the 180-250 layer, and plural layer high refractive index layer 22 and low-index film 23 form rete 2 '.Said high refractive index layer is processed by high-index material, and said low-index film is processed by low-index material.Attach light control film system:
{1.358H1.220L1.239H1.079L1.286H0.972L1.327H0.954L1.316H1.033L1.277H1.129L1.252H1.214L1.251H1.255L1.246H1.257L1.229H1.229L(1.225H1.226L)^251.202H1.186L1.181H1.197L1.126H1.244L1.049H1.321L0.959H1.387L0.907H1.399L0.966H?1.382L?1.135H1.589L1.634H1.598L1.159H0.682L}
It is 792nm that wavelength wherein is set, refractive index Hn=2.293, low-refraction Ln=1.4538.On behalf of high-index material, 1H, 1L follow 1 optical thickness of low-index material respectively.
For example:
Please refer to shown in Figure 3ly, shown to see through the curve map that effect compares with prior art after increasing thicknesses of layers, wherein steeper curve be the design sketch of the utility model.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (2)
1. a degree Raman long wave pass filter comprises substrate, replaces overlapping plural layer high refractive index layer and the low-index film of being located on the substrate, it is characterized in that, the number of plies after said high refractive index layer and the low-index film stack is the 180-250 layer.
2. 45 degree Raman long wave pass filters as claimed in claim 1 is characterized in that said high refractive index layer is processed by high-index material, and said low-index film is processed by low-index material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204012866U CN202267756U (en) | 2011-10-19 | 2011-10-19 | 45 degrees Raman long wave pass optical filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204012866U CN202267756U (en) | 2011-10-19 | 2011-10-19 | 45 degrees Raman long wave pass optical filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202267756U true CN202267756U (en) | 2012-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204012866U Expired - Fee Related CN202267756U (en) | 2011-10-19 | 2011-10-19 | 45 degrees Raman long wave pass optical filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202267756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422978A (en) * | 2013-09-02 | 2015-03-18 | 大立光电股份有限公司 | Infrared ray filtering element |
-
2011
- 2011-10-19 CN CN2011204012866U patent/CN202267756U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422978A (en) * | 2013-09-02 | 2015-03-18 | 大立光电股份有限公司 | Infrared ray filtering element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518000, Shenzhen, Guangdong province Longgang District, Ping Street, fly Wright industrial plant No. 2 building, 1-4 floor Patentee after: Shenzhen fly photoelectric technology Limited by Share Ltd Address before: 518000 Guangdong Province, Shenzhen city Longgang District Center City Lin Xi Lu City Industrial Park No. three plant floor West Patentee before: Shenzhen Fitech Photonics Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20171019 |