Apparatus for reading a record carrier on which information is s

Details Apparatus for reading a record carrier on which information is s Apparatus for reading a record carrier on which information is s

1974-04-29

1976-07-13

Konick, Bernard

Telegraphy

Systems

Simplex-reversing periodic

1791003V, 178 67A, 350157, G11B 700, G02F 101

Patent

active

039695735

ABSTRACT:
An apparatus is described for reading a record carrier on which information is stored in an optically readable structure. Between a radiation source and an objective system, a polarization-sensitive beam splitter and a .lambda./4 plate are disposed. The optic axis of the .lambda./4 plate is perpendicular to the end faces, so that the plate may be thick and may be rotated in its own plane.

REFERENCES:
patent: 3829622 (1974-08-01), Elliot
"The Optical Scanning System of the Philips `VLP` Record Player," by Bouwhuis and Burgstede; Philips Tech. Rev. 33, pp. 186-189, 1973, No. 7.

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