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Updated: May 12, 2026
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
[Study on the wavelength accuracy of the 2-D slit-array Hadamard spectrometer]
Ming-Bo Chi1, Peng Hao, Yi-Hui Wu
1State Key Lab of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. mbchi@mail.ustc.edu.cn
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|April 17, 2013
Summary
Machining errors in 2-D slit array masks for Hadamard spectrometers affect wavelength accuracy. This study quantifies these errors and proposes methods to improve spectral accuracy for mask design and data correction.
Area of Science:
- Optical Engineering
- Spectroscopy
- Metrology
Context:
- Hadamard spectrometers utilize slit array masks for spectral encoding.
- Machining inconsistencies in 2-D slit array masks introduce wavelength inaccuracies.
- Understanding these errors is crucial for reliable spectroscopic measurements.
Purpose:
- To analyze the impact of machining errors on Hadamard spectrometer wavelength accuracy.
- To develop methods for mitigating spectral shifts caused by slit inconsistencies.
- To establish criteria for mask machining precision.
Summary:
- Investigated the influence of slit width, location, and height errors in 2-D slit array masks on spectrometer wavelength accuracy.
- Developed a simulation model to calculate measurement errors in decoded spectra.
- Quantified spectral shifts due to relative slit location shifts within a column.
Impact:
- Provides a basis for determining required machining precision for 2-D slit array masks.
- Informs the design of masks using micro-electro-mechanical systems (MEMS) technology.
- Enables improved spectral data correction for enhanced spectrometer wavelength accuracy.
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