Lens system

Details Lens system Lens system

1983-03-18

1986-03-11

Corbin, John K.

350454, 350475, G02B 962

Patent

active

045751986

ABSTRACT:
A lens system having three lens groups, or, from front to rear, a 1st lens group having a positive refractive power, a 2nd lens group having a negative refractive power, and a 3rd lens group having a positive refractive power, whereby a proper optical arrangement for said 1st, 2nd and 3rd lens groups and proper rules of design for each lens group are set forth and the aforesaid 3rd lens group is made movable for focusing, to thereby achieve good correction of aberrations.

REFERENCES:
patent: 2645156 (1953-07-01), Tronnier
patent: 4126378 (1978-11-01), Ogino
patent: 4251133 (1981-02-01), Tsuji

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