Optical objectives

Details Optical objectives Optical objectives

1977-03-16

1981-05-12

Henry, Jon W.

350 55, 350 36, 350442, G02B 5122, G02B 1708, G02B 2306

Patent

active

042668492

ABSTRACT:
The invention is a new telescopic optical system that comprises a concave primary reflector and a retro-directive reflector for reflecting light from the primary reflector and forming an erect real image at a plane within the system. In the preferred embodiment the retro-directive reflector is a corner reflector and no intermediate inverted image is found.

REFERENCES:
patent: 2610547 (1952-09-01), Back
patent: 3001446 (1961-09-01), Bouwers et al.
patent: 3397024 (1968-08-01), Boyden et al.
patent: 3671109 (1972-06-01), Sugand et al.
patent: 3721488 (1973-03-01), Kuhne
patent: 3897133 (1975-07-01), Warner et al.
patent: 3926505 (1975-12-01), Rayces

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