Development of high-dispersion grisms and immersion gratings for spectrographs of the Subaru Telescope

Noboru Ebizuka; Masanori Iye; Toshiyuki Sasaki; Moriaki Wakaki

doi:10.1117/12.316818

9 July 1998 Development of high-dispersion grisms and immersion gratings for spectrographs of the Subaru Telescope

Noboru Ebizuka, Masanori Iye, Toshiyuki Sasaki, Moriaki Wakaki

Proceedings Volume 3355, Optical Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.316818
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

We show that a crystalline lithium niobate (LiNbO₃ : LN) grism and a hybrid grism made of a LN transmission grating and a zinc sulfide (ZnS) prism, in spite of their birefringent properties, can be used as new and powerful dispersing elements with high refractive indices to realize high spectral resolution for optical to near infrared astronomical spectrograph with transmission optics. We also show new fabricating methods for grisms and immersion gratings with high index material and deep grooves.

Citation Download Citation

Noboru Ebizuka, Masanori Iye, Toshiyuki Sasaki, and Moriaki Wakaki "Development of high-dispersion grisms and immersion gratings for spectrographs of the Subaru Telescope", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); https://doi.org/10.1117/12.316818

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