Tessor type lens systems for facsimile

Details Tessor type lens systems for facsimile Tessor type lens systems for facsimile

1980-09-22

1983-11-15

Corbin, John K.

G02B 920

Patent

active

044152418

ABSTRACT:
An improved tessor type lens system for facsimile having a large aperture ratio and a high contrast are provided. The lens system comprises for components between object and image as follows; a first positive meniscus lens element, a second biconcave lens element, a third meniscus shaped doublet. The entire lens system is capable of providing an aperture ratio greater than 90% and a half angle of image of approximately 18.degree. with an f number of 4.5.

REFERENCES:
patent: 2764063 (1956-09-01), Lange
patent: 4264139 (1981-04-01), Maeda

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