1
Gerald A Pierce, James L Buxton, Norman A Peppers, Warren J Vinzant: Three-beam optical servo tracking system with two-track parallel readout. Drexler Technology Corporation, July 1, 1986: US04598393 (47 worldwide citation)

A servo tracking system for an optical record uses a pattern of preformed optically detectable uniform servo track marks disposed in parallel spaced apart columns in combination with a beam from a radiation source split by a diffraction grating into three beams having unequal power distribution. The ...


2
Buxton James L, Peppers Norman A, Vinzant Warren J, Pierce Gerald A: Servomecanisme de guidage optique a trois faisceaux avec lecture sur deux pistes, Three-beam optical servo tracking system with two- track parallel readout. Lasercard Corporation, SMART & BIGGAR, January 19, 1988: CA1231779

ABSTRACT A servo tracking system for an optical recorduses a pattern of preformed optically detectable uniformservo track marks disposed in parallel spaced apart columnsin combination with a beam from a radiation source splitby a diffraction grating into three beams having unequalpower distribution. ...