摘要 |
The reference character 5 denotes a supporting shaft holding base, which holds the lower end of a supporting shaft 103 coated with fluororesin with a small frictional coefficient. The reference characters 107a and 107b are tracking magnets bipolar-magnetized in the right and left direction, which are fixed to a fixing base 1 by bonding. The character 108 denotes a mirror for reflecting a light beam 2 incident from the front in the vertical upward direction. The character 6 denotes a lens holder formed of a plastic material, or the like, with light weight and high stiffness, which holds objective lenses 3 and 4 corresponding to a plurality of optical information recording media with different substrate thicknesses and different recording densities at positions eccentrically displaced by almost equal distances from the supporting shaft 103. <IMAGE> |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
NAKAMURA, KEIJI;SHINODA, MASAHISA;UTAKOUJI, TAKESHI;WATANABE, NORIHIRO;TAKESHITA, NOBUO;KOBACHI, HIDEAKI;OGAWA, MASAHARU;YOKOYAMA, EIJI;KOMAWAKI, KOUICHI;KIME, KENJIRO;YABE, MITORU |