Split beam optical character reader

Details Split beam optical character reader Split beam optical character reader

1996-05-13

1999-01-05

Spyrou, Cassandra C.

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

359858, 359862, 359618, 359472, 348 43, 348 49, 348 51, G02B 510, G02B 508, G02B 7182, G02B 2710

Patent

active

058568883

ABSTRACT:
An optical system for an optical character reader in which a camera, such as a TV camera, reads an image field in a document, includes at least one pair of mirrors which shift half of the image both laterally and vertically to convert a relatively long image, for example with a length to height aspect ratio of 1.5:8, into a rectangular image with a much lower aspect ratio, for example 3:4. Preferably two pairs of mirrors are used, so that the image light path for both parts of the image field is the same length. This optical system reshapes the image field from one having an aspect ratio which does not match the 3:4 aspect ratio of most cameras, such as camcorders, TV cameras, security and surveillance cameras and the like, into one that does, thus significantly simplifying the optical character reader, and lowering its cost.

REFERENCES:
patent: 4146786 (1979-03-01), Agulnek
patent: 4634882 (1987-01-01), Craine et al.
patent: 4740836 (1988-04-01), Craig
patent: 4956547 (1990-09-01), Mita
patent: 5223703 (1993-06-01), Setani
patent: 5357369 (1994-10-01), Pilling et al.
patent: 5636069 (1997-06-01), Nightingale et al.

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