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    Method and apparatus for stabilizing the phase of radiation
    2.
    发明授权
    Method and apparatus for stabilizing the phase of radiation 失效
    用于稳定辐射相的方法和装置

    公开(公告)号：US3632214A

    公开(公告)日：1972-01-04

    申请号：US3632214D

    申请日：1969-06-23

    Applicant: IBM

    Inventor： CHANG DAVID C ,  SCHOOLS RODMAN S ,  SINCERBOX GLENN T ,  TAO TIEN-YU

    IPC: G01B9/021 ,  G03H1/04 ,  H01S3/136 ,  G01B9/02 ,  G02B

    CPC classification number: G03H1/0248 ,  G03H2001/0489 ,  H01S3/136

    Abstract: Stabilization of the phase of the radiation utilized in a plural beam interferometric-type system is accomplished. Monitoring of the intensity of the interfering beams of radiation is performed so that a correction signal is generated. By applying the correction signal to control means, the speed of propagation of at least one of the radiation beams is altered to maintain a constant phase relationship.

    Abstract translation: 实现了在多光束干涉式系统中使用的辐射的相位的稳定化。 执行辐射干扰光束的强度的监视，从而产生校正信号。 通过将校正信号应用于控制装置，改变至少一个辐射束的传播速度以保持恒定的相位关系。

    Beam motion compensation in optical image transfer systems having moving parts
    4.
    发明授权
    Beam motion compensation in optical image transfer systems having moving parts 失效
    具有移动部件的光学图像传输系统中的光束运动补偿

    公开(公告)号：US3636838A

    公开(公告)日：1972-01-25

    申请号：US3636838D

    申请日：1969-04-04

    Applicant: IBM

    Inventor： CHANG DAVID C ,  LIPP JAMES

    IPC: B23K26/08 ,  G02B26/12 ,  G02B27/00 ,  H04N3/08 ,  B41B17/12

    CPC classification number: H04N3/08 ,  B23K26/08 ,  B23K2201/007 ,  G02B26/127 ,  G02B27/0025 ,  G02B27/0031

    Abstract: A static electro-optic crystal deflection element, subject to electrical control of refraction, is used as an inertialess compensating element in mechanically controlled projection systems for laser beams. Electrical signals derived from the moving parts of the control mechanism are applied to the crystal to produce compensating refractions of the laser coordinated with short increments of movement of the mechanism. In one application blurring effects associated with continuous rotation of a multifaceted deflection mirror in a photographic tracing system are nullified by electro-optic compensation. In another application distortion due to relative motion between a sensing laser and a rotating drum containing a series of hologram records is cancelled by electro-optic effects coordinated with individual record movements.

    FUNCTIONAL CHECKING OF AN OPTICAL CHANNEL
    7.
    发明专利
    FUNCTIONAL CHECKING OF AN OPTICAL CHANNEL 未知

    公开(公告)号：CA942888A

    公开(公告)日：1974-02-26

    申请号：CA97065

    申请日：1970-10-30

    Applicant: IBM

    Inventor： CHANG DAVID C

    IPC: G02B26/10 ,  G02F1/01 ,  G02F1/29 ,  G11B7/00 ,  G11B7/004 ,  G11C13/04

    Abstract: 1305959 Checking optical systems INTERNATIONAL BUSINESS MACHINES CORP 21 Oct 1970 [5 Nov 1969] 49919/70 Heading G1A Photo-electric apparatus is used to check operation of an optical beam recording system. In the arrangement of Fig. 1 the recording system, operated under computer control, comprises a laser source 10; a half wave plate 12 correcting the polarization of the beam to a predetermined orientation; an electro-optical modulator, e.g. of the crystal type, having transparent electrodes attached to its faces, passing light of a controlled intensity; a plural stage light deflector, each stage of which comprises an electro-optical polarization control device, e.g. a KDP crystal, and a birefringent crystal, e.g. of caliste, the deflector being controlled from 17 to aim the beam where required on a recording medium 18, e.g. a photographic roll film. During the intervals while the film is stepped on, checking is performed by use of arrangement 22 and devices 26, 28. The electro-optical device 23 e.g. a calcite birefringent crystal with transparent electrodes, is energized causing a change in the orientation of polarization of the beam incident on birefringent crystal 25 so that this deflects the beam on path 26 to photo-sensitive diode 27 instead of allowing the beam to pass to the record medium. If the detector output is below a predetermined level a fault is indicated. This may be due to loss of power from the laser or faults in the modulator or drive 17. In an alternative arrangement the device 22 is a beam splitter followed by a mechanical or electro-optical shutter which is closed during checking. No isolate malfunctions in the deflector drive circuit, this is shut down, and a further detector used to sense the deflected intensity which now results from deflection from a different point on birefringent device 25.

    BEAM MOTION COMPENSATION IN OPTICAL IMAGE TRANSFER SYSTEMS HAVING MOVING PARTS
    9.
    发明专利
    BEAM MOTION COMPENSATION IN OPTICAL IMAGE TRANSFER SYSTEMS HAVING MOVING PARTS 未知

    公开(公告)号：CA951154A

    公开(公告)日：1974-07-16

    申请号：CA73611

    申请日：1970-02-02

    Applicant: IBM

    Inventor： CHANG DAVID C ,  LIPP JAMES L

    IPC: B23K26/08 ,  G02B26/12 ,  G02B27/00 ,  H04N3/08

    Abstract: 1283150 Optical systems; projection printing apparatus INTERNATIONAL BUSINESS MACHINES CORP 9 March 1970 [4 April 1969] 11104/70 Headings G2A and G2J In an optical system for illuminating a target area P on a surface 5, a continuously moving part 8 causes the optical path of the system to traverse the target area, and static deflecting means 6 selectively applies a compensating deflection to the optical path for temporarily locking the path on to the target area. The moving part comprises a multisided mirror 8 which rotates to cause a beam from a laser 1 to traverse the target area P. The static deflecting means comprises a KDP crystal 6, connected to an electrical pulse generator 15, which causes the beam to remain on the target area P while a shutter 4 controlled by circuit means 16 is open. In high speed printing on to a photographic emulsion coating the surface 5, each time the shutter 4 opens, control means 2c selects a character, inserts it in a mask 3 and operates beam position controls 2a and 2b ensuring focusing of the character at P. Timing and co-ordination of the shutter control means and pulse generator is effected by a detector 13 detecting light pulses passing through precisely spaced slits in a disc 12 rotating on the mirror. The pulses from the generator 15 may be of sawtooth or sinusoidal wave form. The system may be used for printing pictures by successively printing segments of a pictorial image in the mask 3, or for printing electrical circuits, when segments of an image of the circuit are printed on photo-resist material coating the surface 5. A motion sensor may be incorporated in the pulse generator 15 to produce pulses to counteract extraneous motion of the crystal and the beam. In another embodiment, Fig. 11 (not shown) light passing from a laser (70) is deflected by rotatable mirrors (73, 74) on to a rotating hologram (54) comprising memory record targets. Static deflecting means comprises a KDP crystal (62) which causes the beam to follow the motion of the hologram while a shutter (60) is open. The beam is focused on a target area of the hologram by a lens (76) and, after passing through the hologram, it is focused first by a lens (77) which counteracts the motion of the beam caused by the crystal, then by a lens (78) on to a detector (61).

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