Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double channel filter with regulatable channel relative position and its regulating method

A technology of relative position and adjustment method, applied in the direction of filters, optics, optical components, etc., can solve the problems of limiting the application range of dual-channel filters and difficulty in adjusting the relative position independently.

Inactive Publication Date: 2008-01-30
TONGJI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The multi-channel bandpass filter based on the Fabry-Perot etalon and the heterojunction structure of the above-mentioned one-dimensional photonic crystal are difficult to independently adjust the relative position of each channel, thus limiting the application range of the dual-channel filter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double channel filter with regulatable channel relative position and its regulating method
  • Double channel filter with regulatable channel relative position and its regulating method
  • Double channel filter with regulatable channel relative position and its regulating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Hereinafter, the present invention will be further described by taking a dual-channel one-dimensional photonic crystal as an example in conjunction with the accompanying drawings.

[0028] It can be seen from Figure 1 that as the thickness of the middle layer c increases, the position of the channel moves to the long-wave direction. However, the relative spacing between channels is always the same and cannot be changed. Fig. 2 is a schematic diagram of a bisymmetric structure based on the Fabry-Perot structure of the present invention. Figure 3 shows that as d increases from 0.3L to 0.9L, the channel on the right moves from 650.65nm to 708.1nm, but the channel on the left remains in its original position. It can be seen from Figure 4 that as c increases from 1.4H to 2.0H, the channel on the left moves from 538.7nm to 600nm, but the channel on the right remains unchanged at its original position. In Fig. 5, the double symmetry structure d and c change alternately, star...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a design method that can independently regulate the relative position of the two channels in a double-channel light filtering piece, adopting a bisymmetric structure based on Fabry-Perot etalon. It is different from traditional narrow-band light filtering piece in regulating independently the positions of the two channels by changing the thickness of several middle layers, respectively, and thus overcomes the position coherence phenomenon caused by the position regulation of channel. It introduces the design of the light filtering piece and concrete structure as well as the calculated spectrum characteristic of the double-channel band-pass light filtering piece, etc. It can be applied in the fields of optical detecting apparatus, space technique and so on.

Description

technical field [0001] The invention relates to an optical filter device, in particular to a dual-channel optical filter with adjustable channel relative positions and an adjustment method thereof. It has application prospects in optical instruments, astronomy, remote sensing, etc. Background technique [0002] Traditional multi-channel bandpass filters generally have the following two types: [0003] 1. Multi-channel bandpass filter based on Fabry-Perot etalon [0004] The most typical multi-channel bandpass filter is the Fabry---Perot etalon structure. The filter is a symmetrical structure, with reflective layers at both ends and a spacer layer in the middle. After multiple reflections of the reflective layer, by properly selecting the physical thickness of the spacer layer, this structure can obtain a bandpass with multi-channel transmission characteristics. filter, but since the positions of all channels are related to the thickness of this spacer layer, the position ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/28G02B5/20
Inventor 吴永刚田国勋王占山林小燕
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com