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Proceedings Paper

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

Paper Details

Date Published: 9 July 1998
PDF: 8 pages
Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); doi: 10.1117/12.316818
Show Author Affiliations
Noboru Ebizuka, National Astronomical Observatory of Japan (Japan)
Masanori Iye, National Astronomical Observatory of Japan (Japan)
Toshiyuki Sasaki, National Astronomical Observatory of Japan (United States)
Moriaki Wakaki, Tokai Univ. (Japan)


Published in SPIE Proceedings Vol. 3355:
Optical Astronomical Instrumentation
Sandro D'Odorico, Editor(s)

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