Title :
New concept for multiple-valued optical memory
Author_Institution :
Fac. of Eng., Tohoku Gakuin Univ., Tagajo
fDate :
5/8/1997 12:00:00 AM
Abstract :
The authors propose and demonstrate a new concept for multiple-valued optical memory, instead of the usual binary optical memory, based on the recognition of an angle of the slender diffracted-light pattern from one of the slits or slender pits formed, in order, along a track of the optical disk. A photodiode array arranged in a clock face configuration is used for the light pattern recognition
Keywords :
laser beam applications; light diffraction; optical disc storage; photodiodes; 633 nm; He-Ne; He-Ne laser; angle recognition; clock face configuration; multiple-valued optical memory; optical disk; photodiode array; slender diffracted-light pattern;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970608
