Optical reader for information pattern representing coded data

Details Optical reader for information pattern representing coded data Optical reader for information pattern representing coded data

1995-06-19

1996-11-19

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235462, G06K 710

Patent

active

055765270

ABSTRACT:
An optical reader for optically reading an information pattern representing coded data includes a reading head having a hollow casing with a first opening formed in a wall portion thereof to define a reading area, and a light source to illuminate the reading area. The hollow casing has a second opening formed in another wall portion thereof. The second opening is closed by an optical filter which exhibits a large transmissivity to a part of the light emitted from the light source and included in a predetermined wavelength band. Thus, the reading area is visible through the optical filter and a user can visually confirm whether or not the information pattern to be read is encompassed by the reading area.

REFERENCES:
patent: 4639606 (1987-01-01), Boles et al.
patent: 5179269 (1993-01-01), Horie et al.

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