Photo Optic Detector
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20
Asymmetry between two 90-degree out-of-phase signals due to degradation in the photo-optic channels is minimized by using a single photo-optic channel. A single photo-optic track is utilized to generate two 90 degree phased signals, and automatic level control is used to maintain symmetry as the photodevices degrade.