Device for projecting the image of a reticle in an optical syste

Details Device for projecting the image of a reticle in an optical syste Device for projecting the image of a reticle in an optical syste

1984-11-28

1986-11-11

Corbin, John K.

G02B 2136

Patent

active

046219021

ABSTRACT:
A device for projecting the image of a reticle in an optical system whose line of sight is represented by the reticle. The collimator is situated at the edge of the pupil of an objective of the optical system. The optical axes of the objective coincides with the line of sight. According to the invention, the collimator comprises two subcollimators arranged along respective orthogonal axes perpendicular to the optical axis. Each collimator forms an image of a radial slit in such a way that the intersection of the two slit images is situated on the line of sight. In this way, focussing error does not give rise to an angular displacement of the line of sight.

REFERENCES:
patent: 2725781 (1955-12-01), Banker
patent: 3936137 (1976-02-01), Litman

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