- 专利标题： INTEGRATED OPTICAL READ/WRITE HEAD AND APPARATUS INCORPORATING SAME
- 专利标题（中）： 集成光读/写头和装置
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申请号： EP88905541.4申请日： 1988-06-06
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公开(公告)号： EP0363422B1公开(公告)日： 1991-10-23
- 发明人: REVELLI, Joseph, Francis, Jr.
- 申请人： EASTMAN KODAK COMPANY (a New Jersey corporation)
- 申请人地址： 343 State Street Rochester, New York 14650 US
- 专利权人： EASTMAN KODAK COMPANY (a New Jersey corporation)
- 当前专利权人： EASTMAN KODAK COMPANY (a New Jersey corporation)
- 当前专利权人地址： 343 State Street Rochester, New York 14650 US
- 代理机构： Buff, Michel
- 优先权： US62524 19870615
- 国际公布： WO8810493 19881229
- 主分类号： G11B7/12
- IPC分类号： G11B7/12
摘要：
Apparatus for writing and/or reading information on a recording element comprises an integrated optical write/read head (10) of the type comprising a planar optical waveguide (12) and means for deflecting a guided beam of radiation out of the waveguide at an egress zone and for bringing such beam to a focused spot on a desired data track on the recording element. Means, responsive to any displacement of such focused spot from a desired data track, is provided for selectively varying the effective refractive index of the waveguide in the vicinity of the egress zone in order to vary the tracking position of the spot. Such means comprises a pair of spaced parallel electrodes (22, 24) in close proximity to the egress zone, and means (20) for producing an electric field between such electrodes, such field varying with the tracking error.
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