Combined tracking position and tilt sensor for optical recording

Details Combined tracking position and tilt sensor for optical recording Combined tracking position and tilt sensor for optical recording

1996-11-12

1998-03-24

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 4432, G11B 700

Patent

active

057320543

ABSTRACT:
A combined sensor for measuring tilt and tracking position of a lens holder with respect to an optical recording actuator base is disclosed. A light source and two photosensitive bi-cell detectors are secured to the actuator base so that a beam from the light source strikes the detectors, and an optical slot or flag is secured to the lens holder between the light source and the detectors, for creating an image on the bi-cell detectors. Output from the bi-cell detectors is converted into information on tilt and position of the lens holder relative to the actuator base.

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