Fixed step catoptric zoom system

Details Fixed step catoptric zoom system Fixed step catoptric zoom system

1988-10-25

1990-06-19

Henry, Jon W.

350429, G02B 1706, G02B 1504

Patent

active

049348051

ABSTRACT:
A fixed step catoptric zoom optical device comprising a plurality of axially-spaced, readily substituted reflectors disposed in a set for receiving and reflecting energy from an object in the ultraviolet through infrared spectrum to generate a real image of the object on a fixed focal plane. The object is magnified, and the image is focused by changing the individual reflectors in the reflector set using a rotating structure. This effects a change in the shape of the reflectors within the reflector set, and the relative distances between the reflectors and the fixed focal plane.

REFERENCES:
patent: 2552940 (1951-05-01), Cornut
patent: 2685820 (1954-08-01), Kaprelian
patent: 3703635 (1972-11-01), Burkarth
patent: 3887263 (1975-06-01), Thompson
patent: 4354742 (1982-10-01), Abel et al.
patent: 4407567 (1983-10-01), Michelet et al.
"An All Reflective Zoom Optical System For the Infrared", 20 Optical Engineering, pp. 450-459 (May/Jun. 1981).

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