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    METHOD AND APPARATUS FOR ALIGNMENT OF OBJECTIVE LENS
    2.
    发明专利
    METHOD AND APPARATUS FOR ALIGNMENT OF OBJECTIVE LENS 失效

    公开(公告)号：JPH0917024A

    公开(公告)日：1997-01-17

    申请号：JP9727096

    申请日：1996-03-15

    Applicant: DISCOVISION ASS

    Inventor： GRASSENS LEONARDUS J ,  HALL HOLLIS O'NEAL II

    IPC: G02B7/02 ,  G11B7/095 ,  G11B7/135 ,  G11B7/22

    Abstract: PROBLEM TO BE SOLVED: To obtain a method and device for aligning an objective lens capable of strictly executing the special alignment of the objective lens relative to a memory medium of an optical system. SOLUTION: This device has a frame 4, a cradle assembly 3, a tower assembly 1, a lever assembly 5 and a gripper assembly 2. The cradle assembly is provided with a base plate alignment assembly and plural tilt actuators. The base plate alignment assembly is provided with a lateral alignment determining means and plural lateral actuators. The tower assembly 1 is provided with a video camera, a tower magnifying lens and a monitor for displaying images. The gripper assembly 2 is provided with an objective lens assembly, an objective lens, an objective lens alignment assembly and an actuator tilt assembly to align the actuator lenses.

    INTERFEROMETER HAVING MICROMIRROR
    3.
    发明专利
    INTERFEROMETER HAVING MICROMIRROR 审中-公开

    公开(公告)号：JP2003185503A

    公开(公告)日：2003-07-03

    申请号：JP2002296901

    申请日：2002-10-10

    Applicant: DISCOVISION ASS

    Inventor： PRIKRYL IVAN ,  HALL HOLLIS O'NEAL II

    IPC: G01B9/02 ,  G01J3/45 ,  G01J3/453 ,  G01J9/02

    Abstract: PROBLEM TO BE SOLVED: To provide an optical filter for an interferometer system for supplying a reference beam not relatively receiving the effect of aberration and capable of monitoring alignment. SOLUTION: This interferometer 10 includes a beamsplitter 32 for splitting a source beam into a test beam 40 and the reference beam 42, an imaging device 24 for detecting an interference pattern, a mirror 38 for reflecting the test beam toward the imaging device, a micromirror 44 for reflecting a portion of the reference beam toward the imaging device and a focusing mechanism 34 for focusing the reference beam on the micromirror. The micromirror has a lateral dimension not exceeding the approximate lateral dimension of a central lobe of the reference beam focused thereon by the focusing mechanism. A spatial filter for reducing effects of aberration in a beam includes a reflector disposed upon a transparent base wherein the reflector has a lateral dimension not exceeding the approximate lateral dimension of a central lobe of the spatial intensity distribution of the beam focused upon the reflector. COPYRIGHT: (C)2003,JPO

    OPTICAL TEST SYSTEM INCLUDING INTERFEROMETER WITH MICROMIRROR AND PIEZOELECTRIC TRANSLATOR FOR CONTROLLING TEST PATH MIRROR
    4.
    发明专利
    OPTICAL TEST SYSTEM INCLUDING INTERFEROMETER WITH MICROMIRROR AND PIEZOELECTRIC TRANSLATOR FOR CONTROLLING TEST PATH MIRROR 审中-公开

    公开(公告)号：JP2003177006A

    公开(公告)日：2003-06-27

    申请号：JP2002280156

    申请日：2002-09-26

    Applicant: DISCOVISION ASS

    Inventor： PRIKRYL IVAN ,  HALL HOLLIS O'NEAL II

    IPC: G01B9/02 ,  G01J3/45 ,  G01J3/453 ,  G01J9/02

    Abstract: PROBLEM TO BE SOLVED: To provide an adjustable optical system that determines aberration in a source beam by comparing a test beam with a reference beam. SOLUTION: This optical system includes a test source for producing the source beam having a spatial intensity distribution including an aberration component, a wavefront analyzer for processing a fringe signal associated with the aberration component, and an interferometer interposed between the test source and wavefront analyzer. The interferometer includes a beamsplitter for splitting the source beam into the test beam and reference beam, a mirror disposed in the test beam path, and a micromirror disposed in the interference beam path. The micromirror reflects a central position of the ference beam toward an imaging device and allows an outer portion of the reference beam to pass thereby. Therefore, this optical system is not affected by the aberration existing in the source beam. COPYRIGHT: (C)2003,JPO

    INTERFEROMETER HAVING A MICROMIRROR
    7.
    发明专利
    INTERFEROMETER HAVING A MICROMIRROR 未知

    公开(公告)号：CA2169141A1

    公开(公告)日：1996-10-08

    申请号：CA2169141

    申请日：1996-02-08

    Applicant: DISCOVISION ASS

    Inventor： PRIKRYL IVAN ,  HALL HOLLIS O'NEAL II

    IPC: G01B9/02 ,  G01J3/45 ,  G01J3/453 ,  G01J9/02 ,  G01J3/26 ,  G02B5/28

    Abstract: An interferometer includes a beamsplitter for splitting a source beam into a test beam and a reference beam, an imaging device for detecting an interference pattern, a mirror disposed in a path of the test beam for reflection of the test beam toward the imaging device, a micromirror disposed in a path of the reference beam for reflection of a portion of the reference beam toward the imaging device, and a focusing mechanism disposed for focusing the reference beam on the micromirror. The micromirror has a lateral dimension not exceeding the approximate lateral dimension of a central lobe of the reference beam focused thereon by the focusing mechanism. A spatial filter for reducing effects of aberration in a beam includes a reflector disposed upon a transpar-ent base wherein the reflector has a lateral dimension not exceeding the approximate lateral dimension of a central lobe of the spatial intensity distribution of the beam focused upon the reflector. A method of filtering a beam in a wavefront measurement system is also provided. This method includes focusing the beam, reflecting a particular first portion of the focused beam, and transmitting a second portion of the beam.

    9.
    发明专利
    未知

    公开(公告)号：BR9600141A

    公开(公告)日：1998-01-06

    申请号：BR9600141

    申请日：1996-01-18

    Applicant: DISCOVISION ASS

    Inventor： CRUPPER RANDOLPH SCOTT ,  DAVIS MARVIN BENJAMIN ,  GETREUER KURT WALTER ,  GRASSENS LEONARDUS J ,  HALL HOLLIS O'NEAL II ,  LEWIS DAVID E ,  SCHELL DAVID LOUIS

    IPC: G11B7/0045 ,  G02B7/04 ,  G11B5/55 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B15/467 ,  G11B17/04 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B21/02 ,  G11B21/10 ,  G11B25/04 ,  G11B33/08 ,  H02K41/035 ,  H03B5/08 ,  H03B5/12 ,  G11B19/20 ,  G11B17/02

    Abstract: The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second, and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetemined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to one another.The system claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.

    METHOD AND APPARATUS FOR ALIGNING AN OBJECTIVE LENS
    10.
    发明专利
    METHOD AND APPARATUS FOR ALIGNING AN OBJECTIVE LENS 未知

    公开(公告)号：CA2173074A1

    公开(公告)日：1996-10-08

    申请号：CA2173074

    申请日：1996-03-29

    Applicant: DISCOVISION ASS

    Inventor： GRASSENS LEONARDUS J ,  HALL HOLLIS O'NEAL II

    IPC: G02B7/02 ,  G11B7/095 ,  G11B7/135 ,  G11B7/22 ,  G02B7/04

    Abstract: An apparatus is described for aligning an actuator lens of an optical disk drive or the like within a baseplate assembly (63). The apparatus comprises a frame (4), a cradle assembly (3) mounted to the frame (4) with at least one degree of freedom of motion, a tower assembly (1) mounted to the frame (4), a lever assembly (5) rotatably mounted to the frame (4), and a gripper assembly (2) mounted to the lever assembly (5). The cradle assembly (3) includes a baseplate alignment assem-bly comprising a source of radiant energy for projecting a beam of radiant energy, means for determining the tilt alignment of the beam with respect to the tower assembly, and a plurality of tilt actuators (32, 33) for aligning the tilt of the beam with respect to the tower assembly (1). The baseplate alignment may further comprise means for determining the lateral alignment of the beam with respect to the tower assembly and a plurality of lateral actuators (55, 56) for aligning the beam laterally with respect to the tower assembly (1). The tower assembly (1) comprises a videocamera (7) having a camera lens (8), a tower magnifying lens (6), and a monitor (11) for displaying a representation of a beam of radiant energy passing through the tower magnifying lens (6) and into the video camera (7). The gripper assembly (2) comprises an objective lens assembly (13), an objective lens (19) mounted to theobjective lens assembly (13), an objective lens alignment assembly (14) for aligning the objective lens (19) with respect to the tower assembly (1) and the cradle assem-bly (3), and an actuator lens tilt assembly (15) for aligning the actuator lens with respect to the tower assembly (1) and the cradle assembly (3).

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