| 摘要 |
<p>An optical pickup apparatus reproduces signals recorded on an optical disk (10), which has a signal track in which a plurality of signal pit strings are arranged in a circumferential direction of the optical disk, each of the signal pit strings including a plurality of signal pits arranged in a line in a radial direction of the optical disk, the optical disk being rotated at a speed v relative to the optical pickup apparatus. The optical pickup apparatus is provided with: a device (21) for projecting a light spot onto at least one signal pit string of the optical disk; a lens (23) for converging a reflected light from the signal pit string and for forming a linear image of the signal pit string at a magnification m; and a one-dimensional scan type photodetector device (25) having a plurality of photoelectric elements arranged in a line and located in an image forming position of the lens, for sequentially scanning, at a scanning speed s, the linear image by the photoelectric elements and for sequentially generating signals of the photoelectric elements. The photoelectric elements are arranged at an angle theta with respect to the direction of the linear image, the angle theta being prescribed as follows: theta = tan<-><1>(mv/s). <IMAGE></p> |
