| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical head device using a frame made of resin, whose optical axis deviation caused by thermal expansion is not generated. SOLUTION: In the optical head device 1 capable of recording to a CD-R, the frame 3 is constituted of a molded article of a polyester resin in which a vinyl ester resin, unsaturated polyester, acrylic ester and acrylate are contained as bonding agents and spherical alumina is tilled as an inorganic filler. The resin used for the frame 3 can be highly filled with the filler, since the filler is spherical, and has extremely low anisotropy of the coefficient of thermal expansion. Since the filler consists of metal or a metal oxide, the frame 3 using the filler has high heat conductivity, a low coefficient of thermal expansion and high rigidity. |
