Optimum design of a holographic parallel flat-field grating

Qing-bo Wang; Zheng-kun Liu; Huo-yao Chen; Shao-jun Fu

doi:10.1117/12.2034933

30 August 2013 Optimum design of a holographic parallel flat-field grating

Qing-bo Wang, Zheng-kun Liu, Huo-yao Chen, Shao-jun Fu

Proceedings Volume 8910, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications; 89101X (2013) https://doi.org/10.1117/12.2034933
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

To widen the working waveband, a new holographic parallel flat-field grating (HPFG) with two sub-gratings lying parallel on the same substrate is designed. Grating parameters of the two gratings, one for 2~5 nm and the other for 5~30 nm, are optimized based on the aberration theory of concave grating. The radius tolerances of curvature of the substrate are also analyzed. Ray-traced spectral images indicate that errors cased by ±1% deviation of radius can be offset by shifting the detector position within 2.5 mm. Finally, we analyze the spectral image-focusing properties. Theoretical spectral resolution of this new HPFG is pretty much the same as that of existing holographic flat-field grating. The simulation results demonstrate that our work probably can be used in the compact spectrometers with a broad spectral region and moderately high resolution.

Citation Download Citation

Qing-bo Wang, Zheng-kun Liu, Huo-yao Chen, and Shao-jun Fu "Optimum design of a holographic parallel flat-field grating", Proc. SPIE 8910, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications, 89101X (30 August 2013); https://doi.org/10.1117/12.2034933

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