Reflective airy ring diffraction grating

A diffraction grating and reflective technology, which is applied in the field of optical components, can solve problems that have not yet been discovered, and achieve the effects of improving uniformity and boundary sharpness, improving precision, and suppressing diffraction effects

Inactive Publication Date: 2012-07-04
ZHEJIANG FORESTRY UNIVERSITY
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101887140 discloses a broadband all-dielectric multilayer reflection diffraction grating and its design method, CN101750650 discloses a multiple diffraction grating, and CN1523591 discloses a wavelength-selective diffraction grating. In terms of grating technology, these patented tec

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
  • Reflective airy ring diffraction grating
  • Reflective airy ring diffraction grating
  • Reflective airy ring diffraction grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Describe in detail below in conjunction with embodiment and with reference to accompanying drawing: see figure 1 and figure 2 , the reflective Airy ring diffraction grating has a laminated structure, from bottom to top there are substrate layer 4, metal reflective film layer 3, semi-transparent and semi-reflective film layer 2 and anti-reflective film layer 1, wherein the metal reflective film layer 3. It is composed of two different metal reflective films 5 and 6 that are paired one by one, and are assembled in a circular and coaxial annular manner. The refractive index of the semi-transparent and semi-reflective film layer is between that of the paired two metal reflective film layers. rate between.

[0015] Said metal reflective film layer 3 is composed of any two reflective films in gold, silver, copper, aluminum and chromium.

[0016] Said transflective film layer 2 is any one of magnesium fluoride film layer, magnesium chloride film layer or zinc sulfide film l...

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

A reflective airy ring diffraction grating has a laminated structure and sequentially comprises a substrate layer (2), a metal reflective film layer (3), a semipermeable and semireflective film layer (4) and an antireflection film layer (1) from the top down, wherein the metal reflective film layer is formed by splicing two paired different metal reflective film layers (5 and 6) one by one at intervals in circular and coaxial annular ways; and the refractive index of the semipermeable and semireflective film layer is between the refractive indexes of the two paired metal reflective film layers. The reflective airy ring diffraction grating improves the light intensity uniformity and the boundary sharpness of a focal plane by changing the amplitude and the phase distribution of incident light, is applied to laser operation, laser precise processing and laser irradiation, has very obvious effects of improving the operation precision, the processing precision and the irradiation uniformity, and solves the problem that the precision and the uniformity are poor because a matched grating is not adopted in the fields over the years.

Description

technical field [0001] The invention relates to an optical element, in particular to a grating which can be applied in the fields of laser medicine, laser processing, laser irradiation and the like. Background technique [0002] In the prior art, gratings are not used to control the boundary sharpness and distribution uniformity of the focal spot in the transmission of laser light. Due to the influence of diffraction, the distribution of the spot will change during the transmission of the laser. Even for a laser with relatively high boundary sharpness and uniform distribution, its sharpness and uniformity will deteriorate after a certain distance, especially for the spot that is focused to the focal point. In order to overcome this problem, an Airy ring diffraction grating whose light intensity reflection coefficient shows an Airy ring distribution and has a π jump in the phase at the point where the light intensity is zero is installed at the transmitting end of the laser, ...

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
IPC IPC(8): G02B5/18
Inventor 储修祥陈瑞品
Owner ZHEJIANG FORESTRY UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap