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32 条记录 (耗时 0.01 秒)

    Electro-optical scanner
    4.
    发明公开
    Electro-optical scanner 失效
    Elektro-optischer Abtaster。

    公开(公告)号：EP0490013A1

    公开(公告)日：1992-06-17

    申请号：EP90810990.3

    申请日：1990-12-14

    申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

    发明人： Gfeller, Fritz, Dr.

    IPC分类号： G11B7/135 ,  G02F1/335 ,  G11B7/00 ,  H04N5/84 ,  H03M9/00 ,  H04N3/36

    CPC分类号： H04N3/10 ,  G02B6/124 ,  G02F1/335 ,  G11B7/1245 ,  H04N5/84

    摘要： Electro-optical Scanner comprising an optical waveguide (41) and an acoustic waveguide (42), arranged on a transparent substrate (40) and being colinear with respect to each other, for deflecting light waves out from the optical waveguide (41) by colinear acousto-optic interaction of the light waves (44) with a short surface acoustic wave traveling diffraction grating (43) propagating in the acoustic waveguide (42). The short traveling diffraction grating (43) is generated by a wide band transducer. Different applications of the electro-optical scanner are possible.

    摘要翻译： 电光扫描器，包括布置在透明基板（40）上并且彼此共线的光波导（41）和声波导（42），用于通过共线性将光波从光波导（41）偏转 光波（44）与在声波导（42）中传播的短表面声波传播衍射光栅（43）的声光相互作用。 短行程衍射光栅（43）由宽带换能器产生。 电光扫描器的不同应用是可能的。

    INTEGRATED OPTICAL READ/WRITE HEAD AND APPARATUS INCORPORATING SAME
    5.
    发明授权
    INTEGRATED OPTICAL READ/WRITE HEAD AND APPARATUS INCORPORATING SAME 失效
    集成光读/写头和装置

    公开(公告)号：EP0363422B1

    公开(公告)日：1991-10-23

    申请号：EP88905541.4

    申请日：1988-06-06

    申请人： EASTMAN KODAK COMPANY (a New Jersey corporation)

    发明人： REVELLI, Joseph, Francis, Jr.

    IPC分类号： G11B7/12

    CPC分类号： G02F1/2955 ,  G11B7/09 ,  G11B7/1245

    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.

    Optical head
    6.
    发明公开
    Optical head 失效
    光学头

    公开(公告)号：EP0259832A3

    公开(公告)日：1989-03-15

    申请号：EP87113110.8

    申请日：1987-09-08

    申请人： HITACHI, LTD.

    发明人： Miyamoto, Norifumi ,  Sato, Yoshio ,  Tsuboi, Nobuyoshi ,  Shimada, Satoshi ,  Sasaki, Hiroshi ,  Koyanagi, Hiroaki ,  Minemura, Hiroyuki

    IPC分类号： G11B7/08 ,  G11B7/085

    CPC分类号： G11B7/08547 ,  G11B7/0912 ,  G11B7/1245 ,  G11B7/1369

    摘要： An optical head is disclosed, in which a plate-shaped optical wave guide (12) comprises an optical system including a collimator lens (14), a beam splitter (3) and an objective lens (15); a laser light source (13) for emitted a laser light in the form of a light beam which is to be impinged on an optical recording medium (6); and electro-acoustic transducers (18a, 18b, 18c, 18d, 18e, 18f) are disposed between the beam splitter (3) and the objective lens (15), the transducers being adapted to be driven by the outer electrical signal for producing surface acoustic waves in the optical wave guide (12), thereby establishing a condensation and rarefaction distribution in refractive index in the optical wave guide (12) which distribution influences the direction of transmission and the degree of focusing on the light beam passing therethrough so that regulation of the tracking and the focal length can be effected without any mechanical movements.

    摘要翻译： 本发明公开了一种光学头，其中板状光学波导（12）包括包括准直透镜（14），分束器（3）和物镜（15）的光学系统; 激光光源（13），用于发射以光束形式射入光学记录介质（6）的激光; 和电声换能器（18a，18b，18c，18d，18e，18f）设置在分束器（3）和物镜（15）之间，换能器适于由外部电信号驱动以产生表面 （12）中的声波，由此在光波导（12）中建立折射率的冷凝和稀疏分布，该分布影响透射方向和通过其的光束的聚焦度，从而调节 的跟踪和焦距可以在没有任何机械运动的情况下实现。

    Light beam scanning read-out apparatus and recording apparatus
    7.
    发明公开
    Light beam scanning read-out apparatus and recording apparatus 失效
    用于记录和用扫描光束再现的装置。

    公开(公告)号：EP0217332A2

    公开(公告)日：1987-04-08

    申请号：EP86113355.1

    申请日：1986-09-29

    申请人： Fuji Photo Film Co., Ltd.

    发明人： Nozaki, Nobuharu Fuji Photo Film Co. Ltd. ,  Nishihara, Hiroshi ,  Suhara, Toshiaki

    IPC分类号： G11B7/00 ,  G02F1/33

    CPC分类号： G11B19/20 ,  G02B6/12004 ,  G11B7/0025 ,  G11B7/1245 ,  H04N1/12 ,  H04N1/1275

    摘要： A light beam scanning read-out apparatus and a light beam scanning recording apparatus comprise an optical system for converting light guided inside of an optical waveguide into collimated optical wave, a device for generating surface acoustic waves which deflect the guided optical wave, a drive circuit for operating the surface acoustic wave generating device so that the frequency of the surface acoustic waves changes continuously, and a focusing grating couplerforcon- verging the guided and deflected optical wave at a space outside of the optical waveguide. The read-out apparatus further comprises a sub-scanning device for moving a read-out original exposed to the converged light with respect to the optical waveguide, and a photodector for detecting light obtained from the read-out original. The recording apparatus further comprises a sub-scanning device for moving a light-sensitive material exposed to the converged light with respect to the optical waveguide, and a modulator for modulating the guided optical wave with an image signal.

    Optical information detection device
    10.
    发明公开
    Optical information detection device 失效
    光信息检测装置。

    公开(公告)号：EP0661562A3

    公开(公告)日：1997-06-11

    申请号：EP94309792.3

    申请日：1994-12-23

    申请人： NIKON CORPORATION

    发明人： Iwasaki, Yutaka, Kosumo Yokohama Kozukue ,  Iwasaki, Jun ,  Oki, Hiroshi ,  Matsuura, Keiji

    IPC分类号： G02B6/12 ,  G02B6/13 ,  G02B21/00 ,  G11B7/00

    CPC分类号： B82Y15/00 ,  G02B6/126 ,  G02B6/14 ,  G02B21/0056 ,  G02B21/0068 ,  G02B21/008 ,  G11B7/1245

    摘要： An optical information detection device includes a substrate (6), a double-moded channel waveguide (7) formed on the substrate, the double-moded channel waveguide having an incident end face which receives incident light, and zeroth-order mode light and first-order mode light being excited in the double-moded channel waveguide in accordance with light incident on the incident end face, a photodetector for detecting the intensity distribution of light propagating through the double-moded channel waveguide, and a first member (8) for selectively removing the zeroth-order mode light excited in the double-moded channel waveguide. Alternatively, the optical information detection device includes a second member (50) for selectively removing light propagating near the center of the double-moded channel waveguide in place of the first member.