Tesser type objective lens system having a rear aperture stop

Details Tesser type objective lens system having a rear aperture stop Tesser type objective lens system having a rear aperture stop

1979-04-04

1981-08-04

Corbin, John K.

G02B 920

Patent

active

042819083

ABSTRACT:
An improved tesser type objective lens system having a rear aperture stop with a relatively wide field angle of about 60.degree. and an F-number of about F 2.8 is provided. The thickness of the second negative lens in the lens system is increased relative to the total axial distance of the lens system which permits the reduction of the Petzval sum while maintaining a balance correction of spherical aberration and coma.

REFERENCES:
patent: 3615126 (1971-10-01), Kojima
patent: 3895857 (1975-07-01), Imai

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