Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2006-05-01
2008-12-09
Lee, John R (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C369S044320, C369S112230
Reexamination Certificate
active
07462855
ABSTRACT:
An optical recording and reproducing apparatus for recording and/or reproducing an optical recording medium by irradiating light from a light source to the optical recording medium as near-field light from a near-field light irradiating unit includes a light source for emitting light, a first light-receiving unit for receiving and detecting returned light from the optical recording medium, a second light-receiving unit for receiving and detecting returned light from the near-field light irradiating unit, a control unit for detecting a relative skew between the optical recording medium and the near-field light irradiating unit based on a plurality of gap detection signals generated from divided detection signals of the second light-receiving unit and a drive control unit for outputting a drive signal to correct a skew of at least the near-field light irradiating unit to a drive unit in response to a skew detected in the control unit.
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Ishimoto Tsutomu
Saito Kimihiro
Lee John R
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sony Corporation
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