Image reading lens

Details Image reading lens Image reading lens

1993-06-01

1994-07-12

Sugarman, Scott J.

Optical: systems and elements

Lens

Including a nonspherical surface

359739, 359795, G02B 1318

Patent

active

053294033

ABSTRACT:
An image reading lens that is constructed of, in succession from the object side, a stop, a meniscus-shaped positive first lens having its convex surface at the image plane side, and a negative second lens having its concave surface at the image plane side. Both the lens surfaces of the first lens and at least one lens surface of the second lens are constructed of an aspherical surface. The shape of the object side aspherical surface of the first lens is formed so as to be inside a reference spherical surface.

REFERENCES:
patent: 3014407 (1961-12-01), Altman
patent: 4755039 (1988-07-01), Hattori

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