Information reading method

Details Information reading method Information reading method

1991-09-09

1993-06-15

Hannaher, Constantine

Radiant energy

Coded record and readers; invisible radiant energy type

235491, G06K 710, G06K 1906

Patent

active

052201660

ABSTRACT:
An information reading method includes the steps of irradiating a phosphor activated by neodymium and ytterbium ions with exciting light of a wavelength between 500 nm and 780 nm that can excite the neodymium ions, and reading the information by receiving the light emitted from the phosphor with a photodetector designed to detect light with wavelengths between 840 m and 1100 nm. Consequently, the information recorded using the phosphor activated by neodymium and ytterbium ions can be read with a high performance without using a filter for cutting the exciting light.

REFERENCES:
patent: 3566120 (1971-02-01), Lane, Jr.
patent: 3946203 (1976-03-01), Hecht et al.
patent: 4202491 (1980-05-01), Suzuki

Affiliated with

Also associated with

Rating

Information reading method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1045239