Method of eliminating astigmatism and coma in a spectrograph inc

Details Method of eliminating astigmatism and coma in a spectrograph inc Method of eliminating astigmatism and coma in a spectrograph inc

1978-03-29

1980-01-15

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

For spectrographic investigation

G01J 340

Patent

active

041836685

ABSTRACT:
To eliminate astigmatism and coma in a spectrograph the distance between the entrance slot and a first concave mirror, as well as the relative angular positions of the entrance slot, the plane grating, the two concave mirrors and the focal plane are selected so as to satisfy the following conditions. ##STR1##

REFERENCES:
patent: 3048080 (1962-08-01), White
patent: 3567323 (1971-03-01), Chupp et al.
patent: 3985443 (1976-10-01), Danielsson
Schroeder; Publ. Astron. Soc. Pacific (USA), vol. 82, No. 490, Dec. 1970, pp. 1253-1279.
Kaneko et al., Applied Optics, vol. 10, No. 2, Feb. 1971, pp. 367-381.
Horwitz, Optica Acta, vol. 21, No. 3, Mar. 1974, pp. 169-190.

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