CN204389725U - A kind of bimodal optical filter - Google Patents
A kind of bimodal optical filter Download PDFInfo
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- CN204389725U CN204389725U CN201520001695.5U CN201520001695U CN204389725U CN 204389725 U CN204389725 U CN 204389725U CN 201520001695 U CN201520001695 U CN 201520001695U CN 204389725 U CN204389725 U CN 204389725U
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- filter coating
- light
- main peak
- transmissive substrate
- coating
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Abstract
The utility model discloses a kind of bimodal optical filter, comprise the light-transmissive substrate that fused silica glass is made, at this light-transmissive substrate relative to both side surface being coated with respectively main peak filter coating and auxiliary filter coating; Because light-transmissive substrate is relative to both side surface being coated with respectively main peak filter coating and auxiliary filter coating, so just can measure for 808nm and 850nm two kinds of laser wavelengths in laser range finder simultaneously, significantly improve distance accuracy, the utility model is without the need to using coloured glass in addition, therefore background depth is high, and there is not autofluorescence effect, spuious level is low.
Description
Technical field
The utility model relates to optical field, in particular, relates to a kind of bimodal optical filter.
Background technology
Laser range finder is a kind of instrument utilizing laser to carry out target range Accurate Determining.Laser range finder is operationally to objective emission laser, and be received from by photovalve the laser beam that target reflects, timer is measured laser and come and gone the time used, can calculate observer's range-to-go.
Analyze optical element as the requisite detection of laser range finder, its core component optical detection device can obtain important detection signal by various optical filter.Existing 808nm and 850nm two kinds of laser range finder optical filters are all generally the relatively independent range findings completing single wavelength.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of bimodal optical filter, can complete the measurement of 808nm and 850nm two wave band of laser simultaneously, and realize low stray light level, accuracy of detection is high.
For solving the problem, the utility model adopts following technical scheme: a kind of bimodal optical filter, comprises the light-transmissive substrate be made up of fused silica glass, at described light-transmissive substrate relative to both side surface being coated with respectively main peak filter coating and auxiliary filter coating.
As preferably, described main peak filter coating and the auxiliary filter coating all dielectric film all for being made up of tantalum pentoxide and silicon dioxide two kinds of different refractivity material alternate platings.
As preferably, described main peak filter coating is by the filter coating of F-P Fabry-Perot interference technique construction.
As preferably, described auxiliary filter coating superposes by the short-pass of F-P Fabry-Perot interference technique construction, long-pass the interference cut-off light filtering films formed.
The beneficial effects of the utility model are: because light-transmissive substrate is relative to both side surface being coated with respectively main peak filter coating and auxiliary filter coating, so just can measure for 808nm and 850nm two kinds of laser wavelengths in laser range finder simultaneously, significantly improve distance accuracy, the utility model is without the need to using coloured glass in addition, therefore background depth is high, and there is not autofluorescence effect, spuious level is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of bimodal optical filter of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 1, the utility model provides a kind of bimodal optical filter, comprises the light-transmissive substrate 520 that fused silica glass is made, and described light-transmissive substrate 520 relatively both side surface have been coated with main peak filter coating 510 and auxiliary filter coating 530 respectively.
Described main peak filter coating 510 and the auxiliary filter coating 530 all dielectric film all for being made up of tantalum pentoxide and silicon dioxide two kinds of different refractivity material alternate platings.
Described main peak filter coating 510 is by the filter coating of F-P Fabry-Perot interference technique construction.
Described auxiliary filter coating 530 superposes by the short-pass of F-P Fabry-Perot interference technique construction, long-pass the interference cut-off light filtering films formed.
Adopt the main peak filter coating 510 of F-P Fabry-Perot interference technique construction, center operating wavelength 808nm and 850nm.808nm and 850nm light transmission, transmitance T > 90%, pass band width 20nm, its film material H (TA2O5), L (SIO2), main peak filter coating film structure is:
(HL4H2L6H2L6H2L6H2L4HLHL)^5
Adopt the auxiliary filter coating 530 of F-P Fabry-Perot interference technique construction, 808nm and 850nm light transmission, transmitance T > 90%, pass band width 20nm, except main peak, wavelength location is at 200nm ~ 1100nm, full spectral coverage T < 0.06%.Coating Materials H (TA2O5), L (SIO2), auxiliary filter coating film structure is:
1.26(HL)^150.84(hl)^180.656(hl)^180.532(hl)^180.403(hl)^15
Main peak filter coating 510 and auxiliary filter coating plated film 530 are plated in the two sides of the light-transmissive substrate 520 that fused silica glass is made respectively, ensure during plated film that coating film thickness difference is little as far as possible, making optical filter component side type, there is not the change caused by plated film stress in the basic technical indicators such as aperture.
Because fused silica glass is light-transmissive substrate, tantalum pentoxide, silicon dioxide is film material, this light-transmissive substrate is relative to both side surface being coated with respectively main peak filter coating and auxiliary filter coating, so just can be coated with a kind of bimodal optical filter simultaneously used for 808nm and 850nm two kinds of laser ranging instruments, the laser beam time making optical element more accurately calculate reception 2 wavelength to return, significantly improve distance accuracy, the utility model is without the need to using coloured glass in addition, therefore background depth is high, and there is not autofluorescence effect, spuious level is low.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.
Claims (3)
1. a bimodal optical filter, it is characterized in that: comprise the light-transmissive substrate be made up of fused silica glass, described light-transmissive substrate upper and lower surface is coated with main peak filter coating and auxiliary filter coating respectively, described main peak filter coating and the auxiliary filter coating all dielectric film all for being made up of tantalum pentoxide and silicon dioxide two kinds of different refractivity material alternate platings.
2. the bimodal optical filter of one according to claim 1, is characterized in that: described main peak filter coating is by the filter coating of F-P Fabry-Perot interference technique construction.
3. the bimodal optical filter of one according to claim 1, is characterized in that: described auxiliary filter coating superposes by the short-pass of F-P Fabry-Perot interference technique construction, long-pass the interference cut-off light filtering films formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520001695.5U CN204389725U (en) | 2015-01-05 | 2015-01-05 | A kind of bimodal optical filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520001695.5U CN204389725U (en) | 2015-01-05 | 2015-01-05 | A kind of bimodal optical filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204389725U true CN204389725U (en) | 2015-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520001695.5U Expired - Fee Related CN204389725U (en) | 2015-01-05 | 2015-01-05 | A kind of bimodal optical filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN204389725U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005107A (en) * | 2015-08-07 | 2015-10-28 | 西安中科晶像光电科技有限公司 | Multispectral dual-channel photonic crystal filter at visible region |
| CN105549142A (en) * | 2016-03-03 | 2016-05-04 | 郑光威 | Dielectric film transmission type spatial narrowband filter combined device |
| CN114825009A (en) * | 2022-03-23 | 2022-07-29 | 北京飞秒留声科技有限公司 | Double-color coherent light generation system based on single laser |
| CN116497310A (en) * | 2023-04-04 | 2023-07-28 | 北京创思镀膜有限公司 | Optical film element and preparation method thereof |
-
2015
- 2015-01-05 CN CN201520001695.5U patent/CN204389725U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005107A (en) * | 2015-08-07 | 2015-10-28 | 西安中科晶像光电科技有限公司 | Multispectral dual-channel photonic crystal filter at visible region |
| CN105005107B (en) * | 2015-08-07 | 2017-07-21 | 西安中科晶像光电科技有限公司 | A kind of multispectral two-channel photon crystal wave filter of visible region |
| CN105549142A (en) * | 2016-03-03 | 2016-05-04 | 郑光威 | Dielectric film transmission type spatial narrowband filter combined device |
| CN114825009A (en) * | 2022-03-23 | 2022-07-29 | 北京飞秒留声科技有限公司 | Double-color coherent light generation system based on single laser |
| CN116497310A (en) * | 2023-04-04 | 2023-07-28 | 北京创思镀膜有限公司 | Optical film element and preparation method thereof |
| CN116497310B (en) * | 2023-04-04 | 2023-12-05 | 北京创思镀膜有限公司 | Optical film element and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20150610 Termination date: 20190105 |