Title :
The Light-Pattern Meter
Author_Institution :
Canadian Broadcasting Corporation, Montreal, Quebec, Canada
Abstract :
A new meter which determines the amplitudes of sine waves recorded on disks is described. It is accurate to 0.5 db and obviates the need of a dark room for measurement of the useful "christmas-tree pattern."
Keywords :
Broadcasting; Electrons; H infinity control; Instruments; Lenses; Optical recording; Optical reflection; Optical surface waves; Surface waves; Velocity measurement;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1948.232620
