Reflection type image forming optical system having a large angl

Details Reflection type image forming optical system having a large angl Reflection type image forming optical system having a large angl

1975-03-10

1977-07-26

Corbin, John K.

350206, G02B 1706

Patent

active

040379434

ABSTRACT:
A reflection type image forming optical system having a large angle of view comprises a convex mirror for reflecting incident light and a concave mirror. The concave mirror is disposed with the reflecting surface thereof facing the reflecting surface of the convex mirror so that light reflected by the convex mirror at a large angle with respect to the normal thereof enters the concave mirror at a large angle and that light reflected by the convex mirror at a small angle with respect to the normal thereof enters the concave mirror at a small angle. The concave mirror is arranged so that the distance between the center of curvature of the convex mirror and that of the concave mirror is greater than half the radius of curvature of the concave mirror.

REFERENCES:
patent: 2737850 (1956-03-01), Raitiere
patent: 3112355 (1963-11-01), Ross
patent: 3203328 (1965-08-01), Brueggeman
patent: 3707325 (1972-12-01), Hardeman

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