摘要 |
PROBLEM TO BE SOLVED: To provide an optical pickup device and an optical disk device which allow offset of a tracking error signal to be suppressed with simple configuration.SOLUTION: The optical pickup device includes: a photodetector for detecting reflected light from a disk and including sensors 201 to 204 and 211 to 214; and a signal calculation circuit. When the detection signals of the sensors 201 to 204 and 211 to 214 are represented by A, B, C, D, SA, SB, SC and SD, respectively, and a tracking error signal is represented by TESI, the signal calculation circuit uses signals MPP and SPP and multipliers α, &bgr;, and k to generate the tracking error signal TES1 on the basis of expressions TES1=MPP-k×SPP, MPP=(1+α)×(B+C)-(1-α)×(A+D), and SPP=(1+&bgr;)×(SB+SC)-(1-&bgr;)×(SA+SD) . |