Detection mark and method and apparatus for detecting mark

Details Detection mark and method and apparatus for detecting mark Detection mark and method and apparatus for detecting mark

1991-06-27

1993-05-11

Hannaher, Constantine

Radiant energy

Coded record and readers; invisible radiant energy type

235463, 235468, 235473, 235491, 2504581, 2504591, 2504611, G06K 712

Patent

active

052104117

ABSTRACT:
A detection mark comprising a pattern formed from a thin phosphor layer which emits a light having a different wavelength from that of an excitation light irradiated on a surface side of the phosphor layer, and an undercoat layer which is formed on a rear surface side of the phosphor layer and reflects the excitation light, which mark can be detected by intermittently irradiating the excitation light to the mark and reading a light or afterglow from the phosphor layer.

REFERENCES:
patent: 4202491 (1980-05-01), Suzuki
patent: 4783166 (1988-11-01), Stern
patent: 4983817 (1991-01-01), Dolash et al.
F. J. Bealle, "Read Head." IBM Technical Disclosure Bulletin, vol. 18, No. 3 Aug. 1975 p. 659.

Affiliated with

Also associated with

Rating

Detection mark and method and apparatus for detecting mark does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detection mark and method and apparatus for detecting mark, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection mark and method and apparatus for detecting mark will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1352967