中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

25 records (took 0.019 seconds)

    OPTICAL FLUID ANALYSING APPARATUS
    3.
    发明专利
    OPTICAL FLUID ANALYSING APPARATUS 未知

    公开(公告)号：DE3273423D1

    公开(公告)日：1986-10-30

    申请号：DE3273423

    申请日：1982-06-08

    Applicant: IBM

    Inventor： DEPP STEVEN WADE ,  SINCERBOX GLENN TAVERNIA

    IPC: G01N21/41 ,  G01N21/47

    Abstract: This invention relates to an optical fluid analyzing apparatus which includes transparent means (12, 13) of known refractive index (n1) providing a cell (14) for receiving a fluid sample of unknown refractive index (n2). A diffraction grating (10) is formed in an inner wall (11) of the cell. A light source (15) is positioned at an incident angle ( theta 0) with a grating to satisfy the Bragg condition. A pair of detectors (16, 17) intercept the 0th order and 1st order diffracted light. Circuit means (18) responds to signals generated by the detectors to provide an output indicative of the refractive index of the sample.

    4.
    发明专利
    未知

    公开(公告)号：DE69022685D1

    公开(公告)日：1995-11-02

    申请号：DE69022685

    申请日：1990-11-07

    Applicant: IBM

    Inventor： ASTHANA RAHUL ,  MILLER ROBERT DENNIS ,  SCHELLENBERG FRANKLIN MARK ,  SINCERBOX GLENN TAVERNIA ,  ZAVISLAN JAMES MATTHEW

    IPC: G01J4/04 ,  G02B27/28 ,  G02B27/42 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B7/12

    Abstract: An improved apparatus and method for detecting the polarization state of an optical wavefront is disclosed, which is especially suitable for use in an integrated magneto-optic recording head. An optically transparent waveguide structure (10) transmits TE and TM modes of the wavefront propagated as a beam coupled into the waveguide by a TE/TM grating coupler (16). In the waveguide structure is a periodic structure (21) comprising a birefringent mode separator that splits the propagating beam into TE and TM modes. The mode separator comprises an array of uniformly spaced volumes of identical configuration. Photosensitive devices (13,14) detect the intensity of the light contained within each of the separated beams. The signals from these photosensitive devices are used to determine the state of polarization of the optical wavefront. The periodic structure may, if desired, comprise regions of alternating birefringence, such as a Bragg grating, either in a waveguide layer or a cladding layer. Focal power is introduced (1) by providing focal power in the input grating coupler to the waveguide with a curved grating structure, (2) by varying the pitch of the birefringent mode separator extending in a direction transverse to the optical axis of the propagating beam, or (3) by introducing a surface grating with a varying pitch in a direction transverse of the optical axis.

    TRANSMISSIVE HOLOGRAPHIC OPTICAL ELEMENT AND METHODS OF PRODUCTION THEREOF
    5.
    发明专利
    TRANSMISSIVE HOLOGRAPHIC OPTICAL ELEMENT AND METHODS OF PRODUCTION THEREOF 未知

    公开(公告)号：DE3170009D1

    公开(公告)日：1985-05-23

    申请号：DE3170009

    申请日：1981-10-05

    Applicant: IBM

    Inventor： BJORKLUND GARY CARL ,  SINCERBOX GLENN TAVERNIA

    IPC: G02B26/10 ,  G02B5/32 ,  G03H1/04 ,  G03H1/18 ,  G03H1/02

    Abstract: An inexpensive, high quality transmissive holographic optical element and method for making same are described. The holographic optical element consists of a potentially aberrating substrate which supports a layer of holographic recording material. The material contains a recorded fringe pattern that cancels the aberrations induced in an image wavefront as it passes through the aberrating substrate. This optical element is formed by a method having the following steps. A first wavefront from a source, for example a point focus, is passed through the aberrating substrate, becomes distorted, and then passes through the holographic recording material to a wavefront conjugator. The conjugator launches a conjugate of the distorted wavefront back to the holographic recording material. A second wavefront is then passed through the holographic recording material to form a fringe pattern or hologram as a result of the interference of the conjugate waveform and the second waveform. Subsequently, the developed holographic optical element is illuminated with a reconstruction wave which is the duplicate of the reference wave. Passage of this reconstruction wave through the holographic layer results in an emerging wavefront identical to the conjugated distorted wavefront which is then converted to the original wavefront as it passes through the aberrating substrate.

    9.
    发明专利
    未知

    公开(公告)号：DE69738266D1

    公开(公告)日：2007-12-20

    申请号：DE69738266

    申请日：1997-09-25

    Applicant: IBM

    Inventor： KAUFMAN JAMES HARVEY ,  SINCERBOX GLENN TAVERNIA

    IPC: G06F1/00 ,  G07F7/10 ,  G06F11/34 ,  G06F13/00 ,  G06F21/20 ,  G06Q20/08 ,  G06Q20/10 ,  G06Q20/34 ,  G06Q20/36 ,  G06Q20/40 ,  G06Q40/00 ,  G07F7/12 ,  G07F19/00

    Abstract: A system for rejecting second and subsequent copies of an informationally-equivalent card or badge asserted into a client/server system by processing only those cards having transaction histories recorded thereon by comparison matching a history recorded in a central repository and then rewriting the history on the card and in the repository. The rewritten histories include the current transaction. Counterfeit cards, informationally equivalent to the original card prior to the transaction update of the original card, will be rejected when asserted into the system since their histories mismatch that recorded in the repository.

    HOLOGRAPHIC OPTICAL HEAD
    10.
    发明专利
    HOLOGRAPHIC OPTICAL HEAD 未知

    公开(公告)号：DE3465632D1

    公开(公告)日：1987-10-01

    申请号：DE3465632

    申请日：1984-02-22

    Applicant: IBM

    Inventor： SINCERBOX GLENN TAVERNIA

    IPC: G02B27/28 ,  G02B5/32 ,  G03H1/00 ,  G11B7/08 ,  G11B7/085 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105

    Abstract: A holographic optical head for imaging a laser diode for optical storage or magnetic tracking applications includes three holograms, a beam director and a quarter-wave plate. In a preferred embodiment the beam director is a fourth hologram. The holographic optical head is corrected for aberrations arising from its use with light sources other than the design wavelength by having the first hologram diffract the light into the -1 order direction. This light is then diffracted by the second hologram into the +1 order so as to eliminate aberrations normally caused by wavelength shifts of the laser source.

Patent Agency Ranking