Camera with triplet lenses

Details Camera with triplet lenses Camera with triplet lenses

1995-06-19

1996-07-30

Gellner, Michael L.

354203, G03B 118

Patent

active

055416926

ABSTRACT:
A camera provided with a triplet type lens for taking a photograph in which the first lens having a positive refracting power, the second lens having a negative refracting power and the third lens having a positive refracting power are arranged in that order from the photographic object side of the camera, and a diaphragm is located at the rear of the triplet type lens. In this camera, the longitudinal direction of the picture-taking image plane is curved onto the photographic object side, and the triplet type lens satisfy: 0.41.ltoreq.P.D.ltoreq.0.98 where P is the Petzval's Stun of the triplet type lens and D is the length of the diagonal line of the image plane.

REFERENCES:
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patent: 3944337 (1976-03-01), Ruben
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patent: 4609271 (1986-09-01), Watanabe
patent: 4620775 (1986-11-01), Fujioka
patent: 4787724 (1988-11-01), Kudo et al.
patent: 5161065 (1992-11-01), Ohshita
Japan Patent Abstracts, JP 113016, Section P, Section No. 923, vol. 13, No. 382, p. 14, Aug. 24, 1989.
Japan Patent Abstracts, JP 7013071, published Jan. 17, 1995.
Japan Patent Abstracts, JP 4097111, Section P, Section No. 1387, vol. 16, No. 327, p. 115, Jul. 16, 1992.

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