Reading lens system

Details Reading lens system Reading lens system

1987-12-17

1988-09-27

Corbin, John K.

G02B 960

Patent

active

047737468

ABSTRACT:
A reading lens system, such as may be used in a facsimile machine or the like, having a small size, low cost, high performance and a large aperture ratio of 1:3.2 to 1:3.5 and a half angle of 22.5.degree. or more. The lens includes, in order from the object side, a first lens element which is a positive meniscus lens having its convex surface directed toward the object side, a second lens element which is a positive meniscus lens having its convex surface directed toward the object side, a third lens element which is a negative meniscus lens having its convex surface directed toward the object wide, a fourth lens element which is a negative meniscus lens having its concave surface directed toward the object side, a fifth lens element having its concave surface directed toward the object side, and a sixth lens element which is a positive lens. The second and third lens elements are cemented to make the overall system a five-unit six-element lens configuration. The lens system satisfies

REFERENCES:
patent: 2831397 (1958-04-01), Berger et al.
patent: 2896506 (1959-07-01), Azuma
patent: 2959102 (1960-11-01), Cook
patent: 2959104 (1960-11-01), Cook
patent: 2983192 (1961-05-01), Cook
patent: 3357774 (1967-12-01), Becker
patent: 3560079 (1971-02-01), Wakimoto et al.
patent: 3815974 (1974-06-01), Momiyama
patent: 3912359 (1975-10-01), Uetake et al.

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