Share Email Print

Proceedings Paper

Fast camera for a spectrograph
Author(s): Kyoji Nariai; Yoshiya Matsui; Nobuo Nakamura; Katuo Honda; Qingxin Ru
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The optical design and fabrication of a fast f/1.4 prototype camera for the JNLT are briefly described. The f/1 semisolid Schmidt-Cassegrain camera configuration (a corrector lens plus two aspheric mirrors) developed by Nariai and Yamashita (1987) on the basis of third-order aberration theory is adopted, but the design is modified to reduce the number of aspheric surfaces from four to two. Computer-controlled polishing achieved accuracy of 150 and 200 nm for the corrector plate and secondary mirror, respectively. The use of a constant-radial-shearing interferometer to test the Schmidt corrector plate is explained, and it is reported that the assembled camera had MTF of 55 percent for 100 lp/mm when imaging a 5-micron slit placed in the focal plane.

Paper Details

Date Published: 1 July 1990
PDF: 3 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19121
Show Author Affiliations
Kyoji Nariai, National Astronomical Observatory (Japan)
Yoshiya Matsui, Canon Co. Ltd. (Japan)
Nobuo Nakamura, Canon Co. Ltd. (Japan)
Katuo Honda, Tokyo Institute of Technology (Japan)
Qingxin Ru, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

© SPIE. Terms of Use
Back to Top