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    Acousto-optic light deflection system
    2.
    发明授权
    Acousto-optic light deflection system 失效
    ACOUSTO光学折射系统

    公开(公告)号：US3633995A

    公开(公告)日：1972-01-11

    申请号：US3633995D

    申请日：1970-02-17

    Applicant: IBM

    Inventor： LEAN ERIC G ,  PENNINGTON KEITH S ,  POLE ROBERT V ,  POWELL CARL G

    IPC: G02F1/33 ,  H01S3/101 ,  G02F1/28 ,  H01S3/00

    CPC classification number: H01S3/101 ,  G02F1/332

    Abstract: A system for deflecting a light beam such as a laser beam including a crystal substrate, preferably piezoelectric, having a reflective coating on its surface which functions as a mirror. At least one surface acoustic wave transducer is mounted on the crystal and is actuated by a high-frequency signal source. The transducer propagates surface acoustic waves on the crystal, which produce a periodic deformation on the mirror surface which functions as a phase grating. A light beam directed onto the mirror surface will therefore be deflected at an angle dependent on the acoustic frequency of the surface waves. A plurality of transducers arranged approximately in a semicircle on the crystal and selectively actuated provides a two-dimensional scanning system.

    Abstract translation: 一种用于偏转光束的系统，该激光束包括晶体衬底，优选为压电体，其表面上具有反射涂层，其用作反射镜。 至少一个表面声波传感器安装在晶体上并由高频信号源致动。 传感器传播晶体上的表面声波，其在镜面上产生周期性变形，其用作相位光栅。 因此，指向镜面的光束将以取决于表面波的声频的角度偏转。 在晶体上大致半圆形布置并选择性地致动的多个换能器提供二维扫描系统。

    Internal modulation of injection lasers using acoustic waves
    3.
    发明授权
    Internal modulation of injection lasers using acoustic waves 失效
    使用声音波的注射激光器的内部调制

    公开(公告)号：US3675150A

    公开(公告)日：1972-07-04

    申请号：US3675150D

    申请日：1970-06-30

    Applicant: IBM

    Inventor： HARRIS ERIK P ,  LEAN ERIC G ,  POWELL CARL G

    IPC: H01S3/106 ,  H01S5/06 ,  H01S3/00

    CPC classification number: H01S5/0607 ,  H01S3/1068

    Abstract: An injection laser whose light output is spatially modulated by internal effects in the active region of the laser. An acoustic wave is launched into the laser and is existent only in a small area including the active region of the laser. In low acoustic frequency operation, the acoustic wave is steered over an angle theta to cause the laser light output to be steered through this angle. In high frequency operation, the frequency of the acoustic wave can be changed to steer the light output, or the acoustic wave can be steered to cause light deflection, as in the low frequency case. The acoustic wave causes phase modulation and loss modulation which results in scanning of the light output. The acoustic wave can be a surface acoustic wave, a Love wave, or a Stonley wave.

    Abstract translation: 一种注射激光器，其光输出由激光器的有源区域中的内部效应空间调制。 声波被发射到激光器中，并且仅存在于包括激光器的有源区域在内的小区域中。 在低声频率操作中，声波在角度θ上被转向，以使激光输出转过该角度。 在高频操作中，可以改变声波的频率以引导光输出，或者如在低频情况下可以引导声波引起光偏转。 声波引起相位调制和损耗调制，导致光输出的扫描。 声波可以是表面声波，爱波或斯托利波。

    OPTICAL SYSTEM FOR DISPLAY DEVICE, HEAD MOUNTED VIRTUAL IMAGE DISPLAY UNIT AND PORTABLE COMPUTER SYSTEM
    4.
    发明专利
    OPTICAL SYSTEM FOR DISPLAY DEVICE, HEAD MOUNTED VIRTUAL IMAGE DISPLAY UNIT AND PORTABLE COMPUTER SYSTEM 审中-公开

    公开(公告)号：JP2002116409A

    公开(公告)日：2002-04-19

    申请号：JP2001210583

    申请日：2001-07-11

    Applicant: IBM

    Inventor： BUDD RUSSEL A ,  DOVE DEREK B ,  LOVAS ISTVAN ,  OYLHA ROBERT S ,  POWELL CARL G

    IPC: G02B5/04 ,  G02B1/10 ,  G02B5/10 ,  G02B5/30 ,  G02B17/08 ,  G02B27/00 ,  G02B27/01 ,  G02B27/02 ,  H04N5/64

    Abstract: PROBLEM TO BE SOLVED: To provide a compact head mounted virtual image display unit in which an optical system equipped with a distinct see-through function is incorporated. SOLUTION: The optical system includes a microminiaturized display device, a beam split prism, a field lens, a diverging lens, a reflecting lens and a 1/4 wavelength plate. A picture signal linearly polarized by following the microminiaturized display device passes through the field lens and the diverging lens (a), is made incident on the beam split prism and passes through the polarization plane thereof (b), passes through the 1/4 wavelength plate and is circularly polarized (c), is reflected on the surface of the reflecting lens and passes through the 1/4 wavelength plate again, and in linearly polarized in a polarization direction rotated by 90 deg. with an original linear polarization direction related to the picture signal as reference (d), and is made incident on the beam split prism again, reflected on the polarization plane thereof and emitted from the beam split prism as seen by a user (e).

    COMPACT OPTICAL SYSTEM AND PACKAGING FOR HEAD MOUNTED DISPLAY
    5.
    发明专利
    COMPACT OPTICAL SYSTEM AND PACKAGING FOR HEAD MOUNTED DISPLAY 未知

    公开(公告)号：CA2349650A1

    公开(公告)日：2002-01-27

    申请号：CA2349650

    申请日：2001-06-01

    Applicant: IBM

    Inventor： POWELL CARL G ,  OLYHA ROBERT S JR ,  LOVAS ISTVAN ,  DOVE DEREK B ,  BUDD RUSSEL A

    IPC: G02B5/04 ,  G02B1/10 ,  G02B5/10 ,  G02B5/30 ,  G02B17/08 ,  G02B27/00 ,  G02B27/01 ,  G02B27/02 ,  H04N5/64 ,  G02B27/18

    Abstract: A head mounted virtual image display unit is provided which is compact in si ze and weight, and incorporates a high performance optical system offering a clear see- through capability. A sliding light shield may be incorporated for those instances when see-through capability is not desired. A focus adjustment may be incorporated to permit the focusing of the image, fo r example, at a distance of approximately 18 inches to infinity. An adjustable headband may be incorporated that adapts to fit the users head. A flexible boom structure may be incorporated to facilitate fine positional adjustment of the optical assembly. A slider and ball joint mechanism may al so be incorporated to facilitate positional adjustment of the optical assembly. A built-in microphone may be incorporated to enable speech input by the user. The head mounted virtual image display unit may be used comfortably in conjunction with eye or safety glasses, and provides a useful image to the user without blocking his view of the surrounding environment. The unit is design ed to have a pleasing appearance so as to greatly enhance user acceptability.

    COMPACT OPTICAL SYSTEM AND PACKAGING FOR HEAD MOUNTED DISPLAY
    6.
    发明专利
    COMPACT OPTICAL SYSTEM AND PACKAGING FOR HEAD MOUNTED DISPLAY 未知

    公开(公告)号：CA2349650C

    公开(公告)日：2007-08-21

    申请号：CA2349650

    申请日：2001-06-01

    Applicant: IBM

    Inventor： LOVAS ISTVAN ,  POWELL CARL G ,  OLYHA ROBERT S JR ,  BUDD RUSSEL A ,  DOVE DEREK B

    IPC: G02B5/04 ,  G02B27/01 ,  G02B1/10 ,  G02B5/10 ,  G02B5/30 ,  G02B17/08 ,  G02B27/00 ,  G02B27/02 ,  G02B27/18 ,  H04N5/64

    Abstract: A head mounted virtual image display unit is provided which is compact in si ze and weight, and incorporates a high performance optical system offering a clear see- through capability. A sliding light shield may be incorporated for those instances when see-through capability is not desired. A focus adjustment may be incorporated to permit the focusing of the image, fo r example, at a distance of approximately 18 inches to infinity. An adjustable headband may be incorporated that adapts to fit the users head. A flexible boom structure may be incorporated to facilitate fine positional adjustment of the optical assembly. A slider and ball joint mechanism may al so be incorporated to facilitate positional adjustment of the optical assembly. A built-in microphone may be incorporated to enable speech input by the user. The head mounted virtual image display unit may be used comfortably in conjunction with eye or safety glasses, and provides a useful image to the user without blocking his view of the surrounding environment. The unit is design ed to have a pleasing appearance so as to greatly enhance user acceptability.

    COMPLEX CHARACTER GENERATOR
    7.
    发明专利
    COMPLEX CHARACTER GENERATOR 未知

    公开(公告)号：CA1140679A

    公开(公告)日：1983-02-01

    申请号：CA364465

    申请日：1980-11-12

    Applicant: IBM

    Inventor： GOERTZEL GERALD ,  POWELL CARL G ,  TSENG SAMUEL C

    IPC: G09G5/28 ,  B41B19/01 ,  G06K15/10 ,  G06T11/20 ,  G09G5/24 ,  G06F3/12 ,  G09G3/20

    Abstract: COMPLEX CHARACTER GENERATOR A character compaction and generation method and apparatus which is particularly adapted to the generation of complex characters such as Kanji characters. A dot matrix defining a given character is compacted into a sparse matrix, with the original character being reconstructed for printing or display from the compacted character defined in the sparse matrix. Each character in the complex character set is compacted and stored in memory one time only, with decompaction being performed each time a given character is to be generated. A set of symbols are defined to represent different patterns which occur frequently in the entire complex character set. Different combinations of the symbols define a given character. The information stored for each sparse matrix representing a given character is comprised of each symbol in the sparse matrix, its position, and its size parameter if the symbol represents a family of patterns which differ only in size. Three groups of different patterns are defined which occur frequently in the complex character set, namely, a first group which has a fixed size for each pattern, a second group which has one size parameter which must be specified for each pattern, and a third group which has a plurality of size parameters which must be specified for each pattern. Certain ones of the characters have elements of different patterns which overlap, such that the character may be encoded utilizing less symbols, and accordingly less bytes of data. A given pattern may be generated at the same time another pattern is being decoded. YO978-010

    COMPACT OPTICAL SYSTEM AND PACKAGING FOR HEAD MOUNTED DISPLAY
    8.
    发明专利
    COMPACT OPTICAL SYSTEM AND PACKAGING FOR HEAD MOUNTED DISPLAY 未知

    公开(公告)号：MY128803A

    公开(公告)日：2007-02-28

    申请号：MYPI20013315

    申请日：2001-07-12

    Applicant: IBM

    Inventor： BUDD RUSSELL A ,  DOVE DEREK B ,  LOVAS ISTVAN ,  OYLHA ROBERT S ,  POWELL CARL G

    IPC: G02B5/04 ,  G09G5/00 ,  G02B1/10 ,  G02B5/10 ,  G02B5/30 ,  G02B17/08 ,  G02B27/00 ,  G02B27/01 ,  G02B27/02 ,  H04N5/64

    Abstract: A HEAD MOUNTED VIRTUAL IMAGE DISPLAY UNIT (10) IS PROVIDED WHICH IS COMPACT IN SIZE AND WEIGHT, AND INCORPORATES A HIGH PERFORMANCE OPTICAL SYSTEM (100) OFFERING A CLEAR SEE-THROUGH CAPABILITY. A SLIDING LIGHT SHIELD (3200) MAY BE INCORPORATED FOR THOSE INSTANCES WHEN SEE-THROUGH CAPABILITY IS NOT DESIRED. A FOCUS ADJUSTMENT (1200, 1300) MAY BE INCORPORATED TO PERMIT THE FOCUSING OF THE IMAGE, FOR EXAMPLE, AT A DISTANCE OF APPROXIMATELY 18 INCHES TO INFINITY. AN ADJUSTABLE HEADBAND (500) MAY BE INCORPORATED THAT ADAPTS TO FIT THE USERS HEAD. A FLEXIBLE BOOM (200) STRUCTURE MAY BE INCORPORATED TO FACILITATE FINE POSITIONAL ADJUSTMENT OF THE OPTICAL ASSEMBLY.A SLIDER AND BALL JOINT MECHANISM MAY ALSO BE INCORPORATED TO FACILITATE POSITIONAL ADJUSTMENT OF THE OPTICAL ASSEMBLY. A BUILT-IN MICROPHONE (2700) MAY BE INCORPORATED TO ENABLE SPEECH INPUT BY THE USER.THE HEAD MOUNTED VIRTUAL IMAGE DISPLAY UNIT MAY BE USED COMFORTABLY IN CONJUNCTION WITH EYE OR SAFETY GLASSES, AND PROVIDES A USEFUL IMAGE TO THE USER WITHOUT BLOCKING HIS VIEW OF THE SURROUNDING ENVIRONMENT. THE UNIT IS DESIGNED TO HAVE A PLEASING APPEARANCE SO AS TO GREATLY ENHANCE USER ACCEPTABILITY.(FIG 3A)

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