IPC Subgroup
G06K 7/12 using a selected wavelength, e.g. to sense red marks and ignore blue marks
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 > using a selected wavelength, e.g. to sense red marks and ignore blue marks
Classification Context
- Section:
- PHYSICS
- Class:
- COMPUTING OR CALCULATING; COUNTING
- Subclass:
- GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS