Reading optical system

Details Reading optical system Reading optical system

1994-02-16

1995-05-23

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

235472, 359740, G06K 710

Patent

active

054183561

ABSTRACT:
A reading optical system is provided which includes a diaphragm and a positive meniscus lens having a concave surface, wherein the concave surface is located on the side of the lens nearest to the diaphragm, and wherein the following relationship exists;

REFERENCES:
patent: 4818856 (1989-04-01), Matsushima et al.

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