by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation

Introduced: September 1968

Last revised: January 2006

Full Title

Methods or arrangements for sensing record carriers > by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation

Section:: PHYSICS
Class:: COMPUTING OR CALCULATING; COUNTING
Subclass:: GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS

2 direct subcodes

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G06K 7/12 using a selected wavelength, e.g. to sense red marks and ignore blue marks
G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light