Time Multiplexed Two Beam Scanner
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-09
This article describes a holographic scanner in which the beams produce by two dissimilar lasers are time multiplexed before reaching the halographic disc. The spatial position of a scan pattern produced by a rotating holographic disc is a function of the holographic recordings and of the frequency of the laser beam which impinges on the disc. Where time multiplexed red and blue laser beans are used with a single rotating holographic disc, the patterns produced by the two lasers will be slightly shifted relative to one another to provide one extremely dense "superpattern".