Catadioptric zoom lens assemblies

Details Catadioptric zoom lens assemblies Catadioptric zoom lens assemblies

1997-10-27

1999-08-17

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359676, 359691, 359726, 359729, G02B 1514, G02B 1700

Patent

active

059402229

ABSTRACT:
A catadioptric zoom lens assembly has a catoptric objective lens group with a forwardly facing primary mirror and a rearwardly facing first surface reflecting secondary mirror located forwardly of the primary mirror to create an intermediate image forwardly of the primary mirror. A zoom relay lens group is located optically rearwardly of the intermediate image and has a stationary field lens subgroup, a first movable lens subgroup and a second movable lens subgroup.

REFERENCES:
patent: 3529888 (1970-09-01), Buchroeder
patent: 4235508 (1980-11-01), Kaprelian
patent: 4971428 (1990-11-01), Moskovich
patent: 5089910 (1992-02-01), Sigler
patent: 5114238 (1992-05-01), Sigler
patent: 5161051 (1992-11-01), Whitney et al.

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