Aspherical lens system for a bar code sensor

Details Aspherical lens system for a bar code sensor Aspherical lens system for a bar code sensor

1990-09-28

1992-11-24

Sugarman, Scott J.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359740, G02B 1318, G02B 908

Patent

active

051668300

ABSTRACT:
In an optical lens system for use in combination with a bar code sensor, first and second meniscus lenses are arranged back to back along an optical axis on object and image sides, respectively, and are identical in configuration and optical charcteristics with each other. Each meniscus lens has effective aspherical surfaces defined by predetermined formulae. On the assumption that the first and the second meniscus lenses have the same refractive index, the optical lens system satisfies the following formulae:

REFERENCES:
patent: 2586418 (1952-02-01), Davis
patent: 4109995 (1978-08-01), Betensky
patent: 4443067 (1984-04-01), Owen, Jr. et al.
patent: 4561730 (1985-12-01), Lawson et al.

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