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AssigneeSamsung Electric Co., Ltd.
InventorsByung-in Ma, In-sik Park, Chong-sam Chung, Jin-hoon Jeon, Tae-yong Doh, Byoung-ho Choi
Estimating the term…
An error signal detection apparatus for an optical recording/reproducing system including a light source emitting a light beam and an objective lens focusing the light beam to form a light spot on a recording medium, the apparatus including: a photodetecting unit dividing at least a part of the light beam passed through the objective lens after being reflected/diffracted from an information stream of the recording medium into light beam portions, and detecting the light beam portions; and a signal processor detecting phase differences between detection signals from the light beam portions to detect a tangential error signal, a defocus error signal, and/or a radial tilt error signal.
An error signal detection apparatus for an optical recording/reproducing system comprising a light source emitting a light beam and an objective lens focusing the light beam to form a light spot on a recording medium, the apparatus comprising:
The error signal detection apparatus of claim 19, wherein the photodetecting unit comprises a photodetector having eight light beam receiving sections in a 2×4 matrix, each light beam receiving section performing photoelectrical conversion.
Dependencies are inferred from the claim text.