| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-density compatible optical pickup device capable of realizing optimal aberration correction by disposing an easily seen position aligning mark in the liquid crystal optical element of high transmittance. <P>SOLUTION: The device has a laser light source, an objective lens for converging a laser light emitted from the laser light source on an optical disk, and a liquid crystal optical element disposed in an optical path between the laser light source and the objective lens to hold a liquid crystal layer between transparent substrates via a framelike seal. On the surfaces of the transparent substrates 101 and 102 of the liquid crystal optical element 1, transparent electrodes 105 and 106 for modulating a phase of a liquid crystal layer 104, and a plurality of position aligning marks 107 and 108 made of photosensitive resins are formed. By using the plurality of position aligning marks 107 and 108 to alight an optical axis for the laser light, the objective lens and the liquid crystal optical element are fixed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
