5 November 2014 Design and optimization of optical system for a spectrometer based on VPHT grating
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Abstract
To overcome some drawbacks of optical system for plane and concave grating typed spectrometer, including serious aberration, worse spectral fatness and low diffraction efficiency etc, a novel optical system based on volume phase holographic transmission (VPHT) grating was designed in this paper. For this grating, its manufacture and theories were investigated, and its diffraction efficiency was numerically simulated. In order to validate this designed optical system, the spectral scaling experiment was performed and the spectral resolution reached 2nm, the calibration equation between the scaling wavelength and corresponding pixels was gotten via linear least square fitting algorithm. It was proved that the wavelength absolute value reach 1.7nm on the wavelength of 635nm, the root-mean-square error (RMSE) of full scaling wavelengths was 0.3nm. These experimental results illustrated that the design of the optical system for spectrometer based on VPHT grating is good.
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Zhong Ren, Guodong Liu, Zhen Huang, Zhihua Xiong, "Design and optimization of optical system for a spectrometer based on VPHT grating", Proc. SPIE 9272, Optical Design and Testing VI, 92720X (5 November 2014); doi: 10.1117/12.2070845; https://doi.org/10.1117/12.2070845
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