发明名称 |
Apparatus for recording and reproducing optical information having an optical waveguide |
摘要 |
A focal point position detector has a light source for emitting light; an optical system for converging light from the light source to an optical recording medium; a coupler for coupling light from the optical recording medium thereto; a waveguide concave mirror for converging light from the coupler; a waveguide convex mirror for slightly reducing a converging degree of light from the waveguide concave mirror; and photodetectors for receiving light from the waveguide convex mirror, The coupler, the waveguide concave and convex mirrors and the photodetectors are integrally formed on a substrate, An apparatus for recording and reproducing optical information has a light source; an optical system for converging light emitted from the light source; an optical waveguide; a coupler for coupling the converged light to the optical waveguide; two waveguide mirrors arranged such that reflected light from the coupler is continuously reflected on the waveguide mirrors; and a photodetector for detecting the light reflected on the waveguide mirrors. The coupler, the optical waveguide, the waveguide mirrors and the photodetector are integrally formed on the same substrate.
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申请公布号 |
US5418765(A) |
申请公布日期 |
1995.05.23 |
申请号 |
US19940188944 |
申请日期 |
1994.01.27 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
MISAWA, SHIGEYOSHI;YOKOMORI, KIYOSHI;NAKAYAMA, MASAHIKO |
分类号 |
G11B7/12;(IPC1-7):G11B7/09 |
主分类号 |
G11B7/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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