Detecting head for use in an apparatus for reading optically an

Details Detecting head for use in an apparatus for reading optically an Detecting head for use in an apparatus for reading optically an

1976-10-07

1978-05-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250239, 358128, G01J 120

Patent

active

040925293

ABSTRACT:
A detecting head for use in an apparatus for reading optically information recorded on a record carrier as a track or tracks comprising an optical system including a projection lens for projecting a light spot onto the track to be read and a device for detecting a relative position between the light spot and the track. The optical system further comprises a device for supporting the projection lens movably in a direction perpendicular to a track direction and a device for driving the projection lens in this direction. The projection lens is further moved in a direction parallel to the track or in a direction parallel to the optical axis of the projection lens.

REFERENCES:
patent: 3381086 (1968-04-01), Moss et al.
patent: 3530258 (1970-09-01), Gregg et al.
patent: 3909608 (1975-09-01), Le Merer et al.
patent: 3932700 (1976-01-01), Snopko

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