Design of stray light suppressed digital micromirror device-based spectrometer with compound parabolic concentrator

Xiangqian Quan; Hua Liu; Zhenwu Lu; Yongqian Quan; Xiaoduo Wang; Xinrong Hu; Hetuo Chen; Xiangquan Tan; Heyang Bu

doi:10.1117/1.OE.54.11.115101

2 November 2015 Design of stray light suppressed digital micromirror device-based spectrometer with compound parabolic concentrator

Xiangqian Quan, Hua Liu, Zhenwu Lu, Yongqian Quan, Xiaoduo Wang, Xinrong Hu, Hetuo Chen, Xiangquan Tan, Heyang Bu

Author Affiliations +

Optical Engineering, Vol. 54, Issue 11, 115101 (November 2015). https://doi.org/10.1117/1.OE.54.11.115101

Abstract

To suppress the stray light caused by the diffraction and scattered light of a digital micromirror device (DMD) in a DMD-based spectrometer, a new concentrator system with a compound parabolic concentrator (CPC) is presented, which has the advantage that all stray light beyond the acceptance angle can be rejected with the most compact device available. The diffraction of DMD is explored to determine the acceptance angle, and the parameters of the concentrator system are analyzed to determine the geometric concentration ratio. The simulation results show that the spectrum concentration efficiency of the CPC is 98.7%, that the stray light concentration efficiency from the DMD is 36.3%, and that the stray light concentration efficiency beyond the acceptance angle is 0.00%. Finally, according to the discussion about tolerance on the CPC, a conclusion can be drawn that the new DMD-based spectrometer with CPC is feasible and significant in suppressing the stray light.

Citation Download Citation

Xiangqian Quan, Hua Liu, Zhenwu Lu, Yongqian Quan, Xiaoduo Wang, Xinrong Hu, Hetuo Chen, Xiangquan Tan, and Heyang Bu "Design of stray light suppressed digital micromirror device-based spectrometer with compound parabolic concentrator," Optical Engineering 54(11), 115101 (2 November 2015). https://doi.org/10.1117/1.OE.54.11.115101

Published: 2 November 2015

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