Optical magnifier apparatus

Details Optical magnifier apparatus Optical magnifier apparatus

Filed on

1990-07-19

Date issued

1992-02-11

Examiner

Arnold, Bruce Y.

Patent Class

Optical: systems and elements

SubClass

Lens

SubSubClass

With viewed object or viewed field illumination

Other Related Categories

359798, 359805, 359818, 359802, G02B 2702, G02B 702

Type

Patent

Status

active

Patent number

050871129

Description

ABSTRACT:
A magnifying assembly of the type employing a lens surrounded by a plastic or metal holding is placed in a light diffuser, which light diffuser is an annular member having an open top which is associated with a peripheral flange upon which the magnifying lens rests. The member has a bottom opening which is associated with an annular curved flange which is abraded so as to uniformly diffuse light over the surface of a document to be read whereby the area enclosed by the bottom opening of the annual member is uniformly illuminated by a light source.

REFERENCES:
patent: 1784168 (1930-12-01), Sander
patent: 2087081 (1937-07-01), Bock
patent: 2092672 (1937-09-01), Hyatt
patent: 2905054 (1959-09-01), Logan
patent: 3600064 (1971-08-01), Walz
patent: 4206978 (1980-06-01), Leopoldi
patent: 4335421 (1982-06-01), Modia et al.
patent: 4567123 (1986-01-01), Ohtaka et al.
patent: 4763986 (1988-08-01), Sego
patent: 4859032 (1989-08-01), Feinbloom

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