A Novel Method For Evaluating The Resolution And The Wavefront Of Plane Diffraction Grating With FFT

1986 ◽  
Author(s):  
Zhong Lin ◽  
Wen-Hong Chin
Keyword(s):  
Diffraction Grating ◽  
Novel Method ◽  
Plane Diffraction

Angle sensitivity testing of equal-period plane diffraction grating fabricated through electron beam lithography line-by-line method

2020 ◽  
pp. 2150144
Author(s):  
Yunhui Dong ◽  
Wei He ◽  
Wen Zhang ◽  
Mingli Dong
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Diffraction Grating ◽  
Incident Light ◽  
Optical Spectrum Analyzer ◽  
Angular Sensitivity ◽  
Sensitivity Testing ◽  
Line Method ◽  
Grating Region ◽  
Plane Diffraction

An equal-period plane diffraction grating fabricated through electron beam lithography line-by-line method was designed and applied to the experiment of angle sensitivity testing. The size of the fabricated grating region was [Formula: see text] mm and the period was 1526 nm. The incident light was transmitted via the Y-type fiber to collimator lens fixed on the angle disc, which can be adjusted to change the incident light angle. The diffraction spectra generated by the incident light irradiating the grating surface were collected by the optical spectrum analyzer. In this experiment, the incident light angle was fixed at 25[Formula: see text]. When the spot moved horizontally by 50 mm, the diffraction wavelength was basically unchanged. When the incident light angle was adjusted from 15[Formula: see text] to 31[Formula: see text], the diffraction wavelength was changed from 834.03 nm to 1589.80 nm, the angular sensitivity was 47.508 nm/[Formula: see text], and the linearity was 0.9998.

Development of High-Resolution Fiber Spectrometer for LIBS Detection

2013 ◽  
Vol 347-350 ◽  
pp. 49-54
Author(s):  
Li Dong Wang ◽  
Zhen Hua Mao ◽  
Zhe Min Chen ◽  
Bing Hui Ma
Keyword(s):  
High Resolution ◽  
Personal Computer ◽  
Optical System ◽  
Diffraction Grating ◽  
Fiber Optic ◽  
Linear Array ◽  
Imaging System ◽  
Universal Serial Bus ◽  
Linear Array Ccd ◽  
Plane Diffraction

This paper introduces a homemade high-resolution miniature fiber optic spectrometer for LIBS detection. The circuit part of the system is mainly controlled by a cortex-M3 chip, transmits data to the personal computer (PC) through the Universal Serial BUS (USB2.0), and a set of spectrometer test software is finished. The optical system is based on Czerny-Turner imaging system, using 1800grv/mm plane diffraction grating, 16μm slit and 2048 pixels linear array CCD as detector, high-resolution spectral output in the range of 335-455nm is required. By precisely calibration and testing, the precision of the system is 0.05nm, and the resolution of the wavelength at the blaze wavelength can up to 0.1nm which can fulfill the general LIBS detection.

X-Ray Measurements with a Plane Diffraction Grating

Nature ◽  
1930 ◽  
Vol 125 (3146) ◽  
pp. 239-239 ◽  
Author(s):  
ERIK BÄCKLIN
Keyword(s):  
Diffraction Grating ◽  
X Ray ◽  
Plane Diffraction
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