| 摘要 |
PROBLEM TO BE SOLVED: To obtain an optical head device incorporated with a liquid crystal element which can withstand laser beams emitted from a high power light source and having stable reproducing and recording characteristics. SOLUTION: A liquid crystal element 100 consisting of two transparent substrates sandwiching a liquid crystal layer and superposed on each other and provided with alignment layers formed by obliquely depositing an inorganic material on the surfaces coming in contact with the liquid crystal layer of the two transparent substrates is provided together with a quarter wave plate 5 in the optical path between a beam splitter 2 of the optical head device and an object lens 6 mounted on an actuator 7. |
