Patent ID: 8031565

Claim:
An optical pickup comprising: a light source for emitting light; an objective lens for condensing light emitted from said light source on a recording medium; a first detector for detecting a first RF signal, with a first frequency characteristic including direct-current (DC), an amount of which is proportional to a total amount of light reflected by the recording medium and an error signal at a focus position of said objective lens; a second detector for detecting a second RF signal, with a second frequency characteristic at a higher range than the first frequency characteristic, an amount of which is proportional to the total amount of the reflected light from the recording medium; and a first controller for controlling a sensitivity of said first detector and a sensitivity of said second detector, and a second controller for adjusting a timing of said first and second RF signals and then band-synthesizing said first and second RF signals; wherein said first detector and said second detector are provided independently of each other.