Image pickup optical system

Details Image pickup optical system Image pickup optical system

1998-12-16

2000-08-29

Epps, Georgia

Optical: systems and elements

Lens

Multiple component lenses

359771, 359773, 359740, G02B 934

Patent

active

06111703&

ABSTRACT:
An image pickup optical system comprising, in order from the object side, a first lens component which comprises a meniscus lens element having a convex surface on the object side and a positive refractive power, a second lens component which comprises a negative lens element, a third lens component which comprises a negative meniscus lens element having a convex surface on the object side and a biconvex lens element, and a fourth lens component which comprises a negative meniscus lens element having a convex surface on the image side. This optical system is configured so as to have a large aperture, reserve a sufficient amount of marginal rays, and correct coma and curvature of field by disposing a stop on the object side of the third lens component and defining a refractive power of a cemented surface of the third lens component within a certain range.

REFERENCES:
patent: 4456345 (1984-06-01), Fujibayashi
patent: 4568151 (1986-02-01), Mihara
patent: 4659190 (1987-04-01), Mihara
patent: 4767201 (1988-08-01), Fujita

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