Photographic small size objective

Details Photographic small size objective Photographic small size objective

1981-06-03

1983-03-15

Corbin, John K.

G02B 960

Patent

active

043765718

ABSTRACT:
A photographic small size objective of the modified Gauss type which is well corrected for high grade imaging performance. The objective comprises, from front to rear, a first lens in a meniscus form of positive power with its convex curvature toward the front, a second lens in a similar form, a third lens in a meniscus form of negative power with its convex curvature toward the front, a fourth lens in a meniscus form of negative power with its convex curvature toward the rear, and a fifth lens of positive power with its rear surface having a strong refractive power.

REFERENCES:
patent: 2319171 (1943-05-01), Warmisham et al.
patent: 3817603 (1974-06-01), Takahashi
patent: 4264138 (1981-04-01), Imai
patent: 4277149 (1981-07-01), Konoma

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