Plano-concave and plano-convex lens system for deflecting...

Details Plano-concave and plano-convex lens system for deflecting... Plano-concave and plano-convex lens system for deflecting...

G - Physics

11

B

88/96.2, 352/32.

G11B 7/12 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01) H04N 5/76 (2006.01)

Patent

CA 1046636

ABSTRACT: An apparatus is described for optically reading a record carrier. Deflection of the read ???? over the record carrier can be achieved with the ??? of an as- sembly of a plano-concave and a plano-convex lens, the radiu??s of curvature of the curved surfaces of the len- ses being equal, and the distances between the curved surfaces being very small. The beam-deflection element is compact, may be disposed near the read objective, and need not ?eet stringent requirements as regards surface quality.

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