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

Multi-fold-surface type grating, and hyperspectral detection device and method

A detection device and grating technology, which is applied in the field of hyperspectral detection, can solve the problems of low light source utilization efficiency, achieve the effects of increasing utilization, reducing diffraction effects, and improving accuracy

Active Publication Date: 2021-02-05
SHANGHAI UNIV
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low efficiency of light source use based on ordinary grating coherent hyperspectral detectors, the present invention provides a multi-fold grating, and a multi-fold grating-based coherent hyperspectral detection device and method

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
  • Multi-fold-surface type grating, and hyperspectral detection device and method
  • Multi-fold-surface type grating, and hyperspectral detection device and method
  • Multi-fold-surface type grating, and hyperspectral detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, the present embodiment provides a hyperspectral detection device, which includes a laser source 1, a beam splitter 2, a first receiver 3, a first objective lens 5, a collimation system lens unit, a first polarizer 8, multiple Folded grating 9, second polarizer 10, second objective lens 11, filter 12, second receiver 13 and signal processing and imaging system 4;

[0042] The hyperspectral detection device can detect targets at a long distance or at a short distance. When it is carried on an aircraft (ordinary aircraft, helicopter, transport aircraft, unmanned aerial vehicle, etc.) Detection of long-distance target areas on the ground; for example, for roadless waterfronts that are not easy to reach with conventional vehicles on the ground, shallow water areas that cannot be reached by ships, the detection device can be carried on the drone, or the detection device can be airborne Enter caves to detect or detect snow mountains from the air or ...

Embodiment 2

[0062] Such as figure 2 As shown, the present embodiment provides a multifold grating 9, which includes a bottom plate 91 and several protrusions 92 connected to one side of the bottom plate 91; several protrusions 92 are arranged at intervals, and the two sides of the protrusion 92 The connected bottom plate 91 is provided with a light-shielding surface 93; the surface of the protrusion 92 includes a plurality of planes, and the plurality of planes are connected end to end in order to form a plurality of folded surfaces.

[0063] Since multiple planes on the surface of the protrusion 92 are connected end to end to form multiple folded surfaces, there is a certain angle between two adjacent planes, which can be either an acute angle or an obtuse angle, and, These included angles may all be set to a uniform value, or may be set to different values ​​as required. In order to understand the technical solution of the present invention more clearly, the surface of the protrusion ...

Embodiment 3

[0073] Such as image 3As shown, the present embodiment provides a hyperspectral detection method, comprising the following steps:

[0074] Obtain local oscillator reference light;

[0075] Among them, the local oscillator reference light is A 6 (t)=A 6 cos(ω 6 t+φ 6 )

[0076] where ω 6 is the frequency of light, φ 6 is the phase of light, A 6 is the light amplitude;

[0077] Obtain light carrying target information;

[0078] Among them, light A carrying target information 17 (t)=A 17 cos(ω 17 t+φ 17 )

[0079] where ω 17 is the frequency of light, φ 17 is the phase of light; A 17 is the amplitude of the light;

[0080] performing coherent processing and imaging on the local oscillator reference light and the light carrying target information to obtain coherent processing and imaging results;

[0081] Coherent processing is:

[0082]

[0083] I(t) is the coherent combined light intensity, β is the photoelectric conversion coefficient, and t is the time;...

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 relates to a multi-fold-surface type grating, a hyperspectral detection device and a hyperspectral detection method. The multi-fold-surface type grating comprises a bottom plate and a plurality of bulges connected with one side of the bottom plate, wherein the bulges are arranged at intervals, and shading surfaces are arranged on the bottom plate connected with the two sides of the bulges; and the convex surface comprises a plurality of planes, the plurality of planes are sequentially connected end to end to form a plurality of folded surfaces. Obviously, the formed grating has the plurality of folded surfaces, and when the multi-fold-surface type grating is used for diffracting light, energy gathered by a zero-order spectrum can be dispersed; and when the multi-fold-surfacetype grating is applied to the hyperspectral detection device, a filter in the detection device filters zero-order spectrum, most of light energy is prevented from being filtered, most of light energycan be used for target detection, the utilization rate of a light source is greatly improved, and meanwhile, the accuracy of hyperspectral target detection is further improved.

Description

technical field [0001] The invention relates to the field of hyperspectral detection, in particular to a polyreflected grating, hyperspectral detection device and method. Background technique [0002] The characteristic of hyperspectral is to improve the resolution of the detection equipment. The characteristic of ordinary grating diffraction is that the zero order gathers 80% of the light energy, but the hyperspectral detection device does not need the zero order line of the grating. All the light has to be filtered out by filters. Therefore, the commonly used grating coherent hyperspectral detection equipment greatly reduces the efficiency of the light source. [0003] Finnish Mike Flinkman (Mika Flinkman) discussed the characteristics and imaging mechanism of hyperspectral in the article (Transmission filters formingorthogonal basis for spectral imaging purposes), but did not realize the organic combination design of hyperspectral and multi-fold surface grating A multifu...

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 Applications(China)
IPC IPC(8): G01N21/21G01N21/47G01N21/01
CPCG01N21/01G01N21/21G01N21/4788G01N2021/0112
Inventor 吴明红雷波金石琦王鸿勇徐刚
Owner SHANGHAI 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