Image readout imaging lens and image readout apparatus

Details Image readout imaging lens and image readout apparatus Image readout imaging lens and image readout apparatus

1998-01-23

2000-01-25

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359784, 359785, G02B 2608

Patent

active

060184108

ABSTRACT:
A first lens made of a positive meniscus lens having a convex surface directed onto the object side, a second lens made of a biconcave lens, and a third lens made of a biconvex lens are successively disposed from the object side, and predetermined conditional expressions are satisfied, thus yielding an image readout imaging lens suitable for reading out the shorter side of A4--sized color originals and the like. Successively from the object side, a first lens L.sub.1 made of a positive meniscus lens having a convex surface directed onto the object side, a second lens L.sub.2 made of a biconcave lens, and a third lens L.sub.3 made of a biconvex lens are disposed, and the following conditional expressions (1) to (5) are satisfied:

REFERENCES:
patent: 5568322 (1996-10-01), Azami et al.
patent: 5589989 (1996-12-01), Estelle et al.

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