Cone optical system

Details Cone optical system Cone optical system

1976-11-18

1978-10-03

Dahl, Lawrence J.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250203R, 350198, 350202, H01J 314

Patent

active

041186222

ABSTRACT:
A cone optical system comprising:
(a) a convex conical mirror having a symmetry axis,
(b) a refracting element having at least one conical surface, with a common symmetry axis with said convex conical mirror, said mirror and refracting element having apex angles selected such that a first paraxial light beam impinging said convex mirror in a direction substantially perpendicular to said symmetry axis is reflected toward said refracting element, traverses same and emerges therefrom as a second paraxial light beam, and
(c) a collecting lens on the side of said refracting element opposite said mirror and adapted to focus said second light beam onto an image point located on said symmetry axis.

REFERENCES:
patent: 3383511 (1968-05-01), Palser
patent: 3838277 (1974-09-01), Morgenstern et al.

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