Gauss type lens

Details Gauss type lens Gauss type lens

1982-09-17

1984-08-21

Corbin, John K.

350431, 350467, G02B 960, G02B 962, G02B 1320

Patent

active

044667116

ABSTRACT:
A Gauss type objective having, from front to rear, a 1st lens of positive power convex toward the front, a 2nd lens of positive power also convex toward the front, a 3rd lens of negative power strongly concave toward the rear, a 4th lens of negative power strongly concave toward the front, a 5th lens of positive power strongly convex toward the rear, and a 6th lens having at least one element of positive power, whereby the 4th, 5th and 6th lenses are made axially movable for focusing, and good correction of aberrations is achieved.

REFERENCES:
patent: 4260223 (1981-04-01), Hamanishi
patent: 4390251 (1983-06-01), Kato
patent: 4395094 (1983-07-01), Hamanishi

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