| 摘要 |
PURPOSE: An optical pickup is provided to enhance productivity with a simple composition and cheaply produce goods by reducing aberration of beam being incident to a disk. CONSTITUTION: The pickup comprises one and more flat beam splitters sloped to a light axis. The pickup has a constant flying-spot gap for offsetting an astigmatism when a beam exiting one and more light sources transmits the sloped flat beam splitter. The beam transmitting the flat beam splitter is scanned to a lens, collecting beam on a disk, through a collimator. The beam reflected from the disk is reflected in reverse of the scanning course to be collected on a photo diode.
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