Optical recording and/or reproducing apparatus with optical sens

Details Optical recording and/or reproducing apparatus with optical sens Optical recording and/or reproducing apparatus with optical sens

1992-02-25

1993-09-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

369 4423, H01J 314

Patent

active

052451828

ABSTRACT:
A polygonal scanning mirror for an optical recorder is magnetically suspended and rotated about a scanning axis. To control position of the scanning mirror, a curved surface mirror is fixed with respect to, and rotates with, the scanning mirror for receiving a radiation beam and reflecting it onto a detector array. The reflected radiation beam is preferably focused by an astigmatic imaging system. Output signals from the detector array are used to control electromagnets of the suspension system.

REFERENCES:
patent: 4766308 (1988-08-01), Karlsson

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