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    TRANSMISSIVE HOLOGRAPHIC OPTICAL ELEMENT ON ABERRATING SUBSTRATE
    22.
    发明专利
    TRANSMISSIVE HOLOGRAPHIC OPTICAL ELEMENT ON ABERRATING SUBSTRATE 未知

    公开(公告)号：CA1159690A

    公开(公告)日：1984-01-03

    申请号：CA388846

    申请日：1981-10-27

    Applicant: IBM

    Inventor： BJORKLUND GARY C ,  SINCERBOX GLENN T

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

    Abstract: TRANSMISSIVE HOLOGRAPHIC OPTICAL ELEMENT ON ABERRATING SUBSTRATE An inexpensive, high quality transmissive holographic optical element and method for making 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. SA9800277

    PROJECTION DISPLAY DEVICE
    23.
    发明专利
    PROJECTION DISPLAY DEVICE 未知

    公开(公告)号：CA1147837A

    公开(公告)日：1983-06-07

    申请号：CA349763

    申请日：1980-04-14

    Applicant: IBM

    Inventor： SINCERBOX GLENN T ,  GORDON JOSEPH G II

    IPC: G02B6/00 ,  G02F1/17 ,  G02F1/19 ,  G09F9/00

    Abstract: PROJECTION DISPLAY DEVICE A projection display device is provided in which variation in the index of refraction is used to modulate attenuated total reflection. The device comprises a thin film of material having a negative dielectric constant and having one side in optical contact with the base of a prism. The second side of the film is in contact with a medium of variable refractive index. A beam of light which is plane polarized in the plane of incidence is passed onto the base of the prism at an angle to excite a surface electromagnetic wave at the interface between the medium and the film, while the refractive index of the medium is varied so as to modulate the beam. SA978075

    AMPLITUDE MODULATION OF LIGHT BEAM
    24.
    发明专利
    AMPLITUDE MODULATION OF LIGHT BEAM 未知

    公开(公告)号：CA1081836A

    公开(公告)日：1980-07-15

    申请号：CA315396

    申请日：1978-10-31

    Applicant: IBM

    Inventor： GORDON JOSEPH G II ,  SINCERBOX GLENN T

    IPC: G02F1/00 ,  G02B26/02 ,  G02F1/01 ,  G02F1/19 ,  G05D25/00

    Abstract: AMPLITUDE MODULATION OF LIGHT BEAM An optical modulator suitable for use with a collimated light beam having a moderate cross section and a fast response time and operational at relatively low voltage includes, for example, a glass prism and a smooth metal surface that are separated by an adjustable gap. The gap is filled with a medium, for example, air, having an index of refraction lower than the prism. A beam of monochromatic light is passed into the prism at a specific angle of incidence to undergo total internal reflection at the glass prism-gap interface. A change of approximately 1 micron in the thickness of the gap is sufficient to change the reflectivity from greater than 95% to essentially zero. The size of the gap is mechanically adjusted and this mechanical device determines the frequency response of the light modulation.

    VISUAL IMAGE RECORDING DEVICE
    25.
    发明专利
    VISUAL IMAGE RECORDING DEVICE 未知

    公开(公告)号：CA1059229A

    公开(公告)日：1979-07-24

    申请号：CA253541

    申请日：1976-05-27

    Applicant: IBM

    Inventor： POLE ROBERT V ,  SHATTUCK MEREDITH D ,  SINCERBOX GLENN T ,  WERLICH HARALD W

    IPC: B41M5/20 ,  G02F1/15 ,  G02F1/17 ,  G03C1/73 ,  G03C5/56 ,  G09F9/30 ,  G11B7/004 ,  G11B7/241 ,  G11B9/08 ,  G02F1/00

    Abstract: A direct view display device comprises a pair of conductive electrodes in spaced relationship and a recording medium having the properties of being both photo-ionizable and capable of electro-chemically producing colored species occupies the space between the electrodes. The display device is exposed to an optical pattern of radiation to which the recording material is sensitive to produce a latent image, and a potential is applied between the electrodes to produce a very dense image corresponding to the optical pattern. The image can be erased by reversing the potential between the electrodes so that the expose and enhance process can be repeated.

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