Abstract

One of the parameters affecting the focus and tracking servo performance is servo crosstalk. Servo crosstalk consists of mechanical, electrical and optical crosstalks. In this paper only the optical crosstalk for systems utilizing the push-pull tracking error signal is investigated. Optical crosstalk we define as a redistribution of radiant intensity over active areas of a servo detector, causing a tracking error signal variation due to a defocusing (focus error) and a focus signal variation due to a tracking error.

© 1989 Optical Society of America