发明名称 |
Optical system of optical information recording/ reproducing apparatus |
摘要 |
An optical system of an optical information recording/reproducing apparatus includes a light source for emitting a generally parallel luminous flux. An objective optical system for converging the luminous flux emitted from the light source portion onto a medium is provided. The objective optical system can comprise a hologram lens or can have both surfaces formed as convex aspherical surfaces. A chromatic aberration correcting element having almost no power is adapted to correct chromatic aberration of the objective lens. A mechanism for independently actuating the objective lens at least in an optical axis direction is provided. Further, a beam splitter for splitting the luminous flux reflected by the medium from a light path directed to the light source portion and guiding the luminous flux to a light receiving system can be provided.
|
申请公布号 |
US5657168(A) |
申请公布日期 |
1997.08.12 |
申请号 |
US19950527980 |
申请日期 |
1995.09.14 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
MARUYAMA, KOICHI;IWAKI, MAKOTO |
分类号 |
G02B27/00;G11B7/135;(IPC1-7):G02B3/02 |
主分类号 |
G02B27/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|