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    WAVELENGTH SWEPT LIGHT SOURCE APPARATUS AND OPTICAL COHERENCE TOMOGRAPHY SYSTEM INCLUDING THE SAME
    1.
    发明申请
    WAVELENGTH SWEPT LIGHT SOURCE APPARATUS AND OPTICAL COHERENCE TOMOGRAPHY SYSTEM INCLUDING THE SAME 审中-公开
    波长光束光源装置和光学相干系统，包括它们

    公开(公告)号：WO2011099409A3

    公开(公告)日：2011-11-17

    申请号：PCT/JP2011052201

    申请日：2011-01-27

    Applicant: CANON KK ,  YOSHII MINORU ,  FUJII EIICHI

    Inventor： YOSHII MINORU ,  FUJII EIICHI

    IPC: H01S3/1055 ,  G01J3/10 ,  G01N21/17 ,  H01S3/08 ,  H01S3/081 ,  H01S3/105 ,  H01S3/106 ,  H01S5/14

    CPC classification number: H01S3/1055 ,  A61B5/0066 ,  G01J3/10 ,  G01N21/4795 ,  G01N2201/0675 ,  H01S3/08009 ,  H01S3/08013 ,  H01S3/0805 ,  H01S3/0812 ,  H01S3/105 ,  H01S3/1068 ,  H01S5/141 ,  H01S5/146

    Abstract: A swept light source apparatus in which oscillation wavelength is continuously changeable is provided. The apparatus includes, inside a resonator (103, 109), an optical amplification medium (101) that amplifies light, a first device (106) configured to disperse light emitted from the optical amplification medium and thus produce beams having different wavelengths, a second device (107) functioning as a non- focusing optical element and configured to collimate the beams having different wavelengths resulting from the dispersion by the first device, and a selecting device (108) configured to select a beam having a specific wavelength from among the beams collimated by the second device. The beam having the specific wavelength selected by the selecting device is fed back to the optical amplification medium. The first and second device may be diffraction gratings or acousto - optical devices. The selcting device may include metal-foil ribbons (301, 302) or an acousto - optical device (108).

    Abstract translation: 提供振荡波长连续变化的扫掠光源装置。 该装置包括在谐振器（103,109）内部放大光放大介质（101），第一装置（106）被配置为分散从光放大介质发射的光，从而产生具有不同波长的光束，第二 （107），其用作非聚焦光学元件并且被配置为对由所述第一装置的色散产生的具有不同波长的光束进行准直;以及选择装置（108），被配置为从所述光束中选择具有特定波长的光束 由第二个设备准直。 具有由选择装置选择的特定波长的光束被反馈到光放大介质。 第一和第二装置可以是衍射光栅或声光装置。 振动装置可以包括金属箔带（301,302）或声光装置（108）。

    3.
    发明专利
    未知

    公开(公告)号：DE69317686D1

    公开(公告)日：1998-05-07

    申请号：DE69317686

    申请日：1993-01-28

    Applicant: CANON KK

    Inventor： YOSHII MINORU ,  NOSE HIROYASU ,  TAKEUCHI SEIJI

    IPC: G01B11/00 ,  G01D5/38 ,  H01L21/027 ,  H01L21/30

    Abstract: A device for detecting the displacement of an object is provided with a semiconductor laser having an active layer for emitting laser beams in two directions, mirrors for directing the laser beams toward a diffraction grating provided on the object, and a detector for receiving the interfering lights diffracted by the diffraction grating. The active layer of the semiconductor laser is arranged substantially parallel to the diffraction grating, to save space, also to enable light deflection such that the spreading direction of the light beams from the semiconductor laser coincides with the direction of pitch of the diffraction grating. The diffraction grating is irradiated with an improved efficiency, giving diffracted lights with higher intensity to the detector and improving the S/N ratio of detection. The space between the semiconductor laser and the object is reduced, thus reducing the entire volume of system.

    DISPLACEMENT MEASURING DEVICE AND DISPLACEMENT MEASURING METHOD
    6.
    发明专利
    DISPLACEMENT MEASURING DEVICE AND DISPLACEMENT MEASURING METHOD 未知

    公开(公告)号：CA2078732A1

    公开(公告)日：1993-03-28

    申请号：CA2078732

    申请日：1992-09-21

    Applicant: CANON KK

    Inventor： SENTOKU KOICHI ,  MATSUMOTO TAKAHIRO ,  NOSE NORIYUKI ,  YOSHII MINORU ,  SAITOH KENJI

    IPC: G03F7/20 ,  G03F9/00 ,  G01B9/02

    Abstract: A method and device for measuring the relative displacement between first and second diffraction gratings includes an interference optical system forming first and second interference rays of light from light diffracted from the first and second diffraction gratings and separating the first and second interference rays of light on the basis of the difference in their direction of polarization, a first detector for detecting the first interference ray of light to generate a first detection signal, a second detector for detecting the second interference ray of light to generate a second detection signal, and signal processing section for detecting the phase difference between the first and second detection signals and for determining the relative displacement between the first and second diffraction gratings on the basis of the phase difference.

    A DISTANCE MEASURING SYSTEM
    7.
    发明专利
    A DISTANCE MEASURING SYSTEM 未知

    公开(公告)号：GB2205397B

    公开(公告)日：1992-01-22

    申请号：GB8811133

    申请日：1988-05-11

    Applicant: CANON KK

    Inventor： NOSE NORIYUKI ,  YOSHII MINORU ,  NIWA YUKICHI ,  KURODA RYO

    IPC: G01D5/38

    Abstract: A device for measuring a moving distance of two relatively moving objects includes a first diffraction grating provided on one of the two objects and disposed along the relatively moving direction of the two objects, and a measuring portion provided on the other object. The measuring portion includes a second diffraction grating, a light source and a photodetecting system, wherein the light source provides lights which are projected upon two points on the second diffraction grating so that they emanate from the two points in the form of diffraction lights having different diffraction orders. The diffraction lights are directed to the same point on the first diffraction grating and are diffracted again by the first diffraction grating so that they are emitted in the same direction, and the photodetecting system is operable to detect a change in the light intensity caused due to the interference of the two lights emanating from the first diffraction grating. The device further includes a detecting system for detecting the relative moving distance of the two objects on the basis of the detection by the photodetecting.

    Measuring Distance
    8.
    发明专利
    Measuring Distance 未知

    公开(公告)号：GB2205397A

    公开(公告)日：1988-12-07

    申请号：GB8811133

    申请日：1988-05-11

    Applicant: CANON KK

    Inventor： NOSE NORIYUKI ,  YOSHII MINORU ,  NIWA YUKICHI ,  KURODA RYO

    IPC: G01D5/38

    Abstract: A device for measuring a moving distance of two relatively moving objects includes a first diffraction grating provided on one of the two objects and disposed along the relatively moving direction of the two objects, and a measuring portion provided on the other object. The measuring portion includes a second diffraction grating, a light source and a photodetecting system, wherein the light source provides lights which are projected upon two points on the second diffraction grating so that they emanate from the two points in the form of diffraction lights having different diffraction orders. The diffraction lights are directed to the same point on the first diffraction grating and are diffracted again by the first diffraction grating so that they are emitted in the same direction, and the photodetecting system is operable to detect a change in the light intensity caused due to the interference of the two lights emanating from the first diffraction grating. The device further includes a detecting system for detecting the relative moving distance of the two objects on the basis of the detection by the photodetecting.

    9.
    发明专利
    未知

    公开(公告)号：DE69937933T2

    公开(公告)日：2008-05-21

    申请号：DE69937933

    申请日：1999-10-29

    Applicant: CANON KK

    Inventor： INA HIDEKI ,  YOSHII MINORU ,  HASEGAWA MASANOBU ,  SATOH TAKASHI

    IPC: G03F9/00 ,  H01L21/027 ,  G03F7/20

    Abstract: A position detecting system includes a light source device for providing coherent light, an incoherence-transforming device for transforming the coherent light from the light source device, into incoherent light, an optical system for dividing the incoherent light from the incoherence-transforming device, wherein one of divided light beams is directed to illuminate a target upon a surface of an object while another of divided light beams is directed to be reflected by a surface which is optically conjugate with the surface of the object, and wherein light from the target and light reflected by the conjugate surface are re-combined, an image pickup device for producing an imagewise signal corresponding to the target on the basis of the light re-combined by the optical system, wherein positional information related to a position of the target with respect to a direction along the surface of the object can be produced on the basis of the imagewise signal, and an image contrast adjusting device for adjusting image contrast of an image of a portion close to the target, as picked up by the image pickup device.

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