Gaussian lens

Details Gaussian lens Gaussian lens

1985-10-08

1987-06-09

Corbin, John K.

G02B 936, G02B 1126

Patent

active

046716270

ABSTRACT:
A high resolving power Gaussian lens used for a facsimile or the like which uses high-density solid image forming elements. To achieve this object, it is necessary to maintain a high resolving power to cover the marginal portion of the image plane. In the Gaussian lens comprising four groups of lenses and being symmetrical to a diaphragm, each lens group comprises a cemented lens composed of a positive meniscus lens with a concave surface directed toward the diaphragm and a negative meniscus lens. The positive lens has a refractive index in excess of 1.74 to flatten an image surface. The second lens group and the third lens group are reduced in thickness to make it possible to have a wider angle.

REFERENCES:
patent: 2600207 (1952-06-01), Cook
patent: 2834253 (1958-05-01), Ito

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