Method of obtaining stigmatic imaging in spectral analysis using

Details Method of obtaining stigmatic imaging in spectral analysis using Method of obtaining stigmatic imaging in spectral analysis using

1975-06-04

1976-10-12

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350162R, 356 79, G01J 312

Patent

active

039854434

ABSTRACT:
The invention relates to a method of obtaining stigmatic imaging in spectral analysis using a concave grating in offplane mounts. The invention comprises placing on one hand the object, which may be an entrance slit, and on the other the focal surface in such a manner with respect to the concave grating that certain conditions specified in disclosed formulae and relating to an othogonal three dimensional coordinate system the origo of which lies in the middle of the grating surface, the X-axis of which runs along the normal to the grating surface, and the Z-axis of which is parallel with the grooves of the grating, are satisfied at a value for the angle between the XY-plane and a line from a selected point on the object to origo that differs from zero.

REFERENCES:
patent: 3775010 (1973-11-01), Chupp et al.
patent: 3865490 (1975-02-01), Grossman

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