Detector for moving velocity of light beam spot

Details Detector for moving velocity of light beam spot Detector for moving velocity of light beam spot

1994-01-19

1994-10-25

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 32, 369 4434, G11B 7085

Patent

active

053595815

ABSTRACT:
A light beam spot moving velocity detector which can accurately detect a velocity in a low velocity range in a seek operation of a light beam spot. The light beam spot moving velocity detector comprises a memory for producing a prestored operation value based on a normalized tracking error signal, a differentiator for differentiating the tracking error signal, and a multiplier for multiplying the output of the memory means with the output of the differentiator. The output of the multiplicate represents the moving velocity of the light beam spot.

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