Lens system with four meniscus lenses made of anomalous dispersi

Details Lens system with four meniscus lenses made of anomalous dispersi Lens system with four meniscus lenses made of anomalous dispersi

1991-03-22

1992-10-27

Sugarman, Scott J.

Optical: systems and elements

Lens

Multiple component lenses

359760, 359761, G02B 964, G02B 962

Patent

active

051594960

ABSTRACT:
A lens system operable with two or three colors comprises a front lens system disposed on the object side relative to a stop and a rear lens system disposed on the image side relative to the stop. The front lens system includes first to third lens groups, while the rear lens system includes fourth to sixth lens groups. Each of the front and rear lens systems includes two meniscus lenses. The meniscus lenses have a concave surface and a negative power. Accordingly, average image points with respect to two or three wavelengths substantially coincide with each other, while the image fields coincide with each other within the range from the vicinity of the optical axis to image peripheral portion.

REFERENCES:
patent: 2734424 (1956-02-01), Bertele
patent: 3154628 (1964-10-01), Bertele
patent: 3567310 (1971-03-01), Bertele
patent: 3630600 (1971-12-01), Bertele
patent: 3700312 (1972-10-01), Bertele
patent: 4359269 (1982-11-01), Itoh

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