Reflective tachometer/headwheel assembly for a rotary head scanner
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United States of America Patent
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Sep 18, 1990
Grant Date -
N/A
app pub date -
Dec 19, 1988
filing date -
Dec 19, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For use in a helical scan magnetic tape record/reproduce apparatus, disclosed is a rotary head scanner including a reflective tachometer/headwheel assembly. The rotary head scanner includes a plurality of magnetic record/reproduce heads mounted on a headwheel which has a reflective tachometer disposed on one side of the headwheel. A radiation source and radiation sensor are located adjacent to the reflective tachometer. The radiation sensor senses radiation reflected from the tachometer and produces a signal which is a function of the rotational position and/or rotational speed of the headwheel.
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