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    • 22. 发明授权
    • Laser light beam generating apparatus
    • 激光光束发生装置
    • US5289479A
    • 1994-02-22
    • US32305
    • 1993-03-17
    • Michio OkaNaoya Eguchi
    • Michio OkaNaoya Eguchi
    • G11B7/125H01S3/08H01S3/109H01S3/10
    • H01S3/109G11B7/125
    • A laser light beam generating apparatus includes at least one light beam source, resonator and an optical system. The resonator generates a type II second harmonic laser light beam. The resonator has a first reflector, a second reflector, a laser medium provided between the first and second reflectors and irradiated a light beam emitted from the light beam source through the first reflector and a non-linear optical crystal element provided between the laser medium and the second reflector. The optical system radiates the type II second harmonic laser light beam emitted from a virtual luminance point of the resonator to a conjugate point. In this laser light beam generating apparatus, with an effective length of the resonator L, an effective distance Le from the resonator to the conjugate point is set to thatLe=(m+1/2)Lwhere m is an integer.
    • 激光束发生装置包括至少一个光束源,谐振器和光学系统。 谐振器产生II型二次谐波激光束。 谐振器具有第一反射器,第二反射器,设置在第一反射器和第二反射器之间的激光介质,并且通过第一反射器照射从光束源发射的光束,以及设置在激光介质与激光介质之间的非线性光学晶体元件 第二反射器。 光学系统将从谐振器的虚拟亮点发射的II型二次谐波激光束辐射到共轭点。 在该激光束生成装置中,在谐振器L的有效长度上,从谐振器到共轭点的有效距离Le被设定为Le =(m + 1/2)L,其中m为整数。
    • 27. 再颁专利
    • Optical pickup device
    • 光学拾取装置
    • USRE37717E1
    • 2002-05-28
    • US09556129
    • 2000-04-20
    • Naoya EguchiShigeo Kubota
    • Naoya EguchiShigeo Kubota
    • G02B900
    • G11B7/1381G02B5/005G11B7/1369G11B7/1374G11B7/139G11B7/13922G11B2007/0006G11B2007/13727
    • An optical pickup device for condensing the light from a light source on a signal recording surface by an objective lens and for detecting the return light from the signal recording surface by a light detection unit is disclosed. The optical pickup device is capable of recording and/or reproducing at least two different sorts of optical recording media. The light beam radiated from a light source is condensed by an objective lens. An aperture varying unit varies the size of an aperture of the objective lens depending upon the sorts of the optical recording media. The return light from the optical recording medium is detected by a light detection unit. The size of the aperture of the objective lens for condensing the light from the light source is varied depending upon the difference in substrate thickness of the different sorts of the optical recording media, thus assuring high-quality recording/reproduction for two or more different sorts of optical recording media.
    • 公开了一种光拾取装置,用于通过物镜将来自光源的光聚焦在信号记录表面上,并且用于通过光检测单元检测来自信号记录表面的返回光。 光学拾取装置能够记录和/或再现至少两种不同种类的光学记录介质。 从光源辐射的光束被物镜会聚。 孔径变化单元根据光学记录介质的种类来改变物镜的孔径的尺寸。 来自光记录介质的返回光由光检测单元检测。 用于聚光来自光源的光的物镜的孔径的大小根据不同种类的光学记录介质的基板厚度的差异而变化,从而确保用于两种或多种不同类型的高质量记录/再现 的光学记录介质。
    • 28. 发明授权
    • Lens device, ultraviolet-ray emitting device, and optical disc recording
device
    • 透镜装置,紫外线发射装置和光盘记录装置
    • US5852508A
    • 1998-12-22
    • US649759
    • 1996-05-15
    • Shigeo KubotaNaoya Eguchi
    • Shigeo KubotaNaoya Eguchi
    • G02B13/18G02B1/10G02B3/02G02B13/14G11B7/135G02B9/04
    • G11B7/1378G02B13/143
    • A lens device for focusing a beam of an ultraviolet-ray region, provided with at least one aspherical lens made of synthetic quartz in which an aspherical portion is formed by a coating a fluororesin on a spherical portion of a side polished to a spherical surface; an ultraviolet-ray emitting device provided with a laser beam source emitting a beam in the ultraviolet-ray region and an object lens which has at least one of the above aspherical lenses; and an optical disc recording device provided with a laser beam source emitting a beam in the ultraviolet-ray region, a light intensity modulating means for modulating the intensity of the laser beam emitted from the laser beam source in accordance with a data signal; and the above object lens.
    • 一种透镜装置,用于聚焦紫外线区域的光束,所述透镜装置设置有至少一个由合成石英制成的非球面透镜,其中通过在抛光到球面的一侧的球形部分上涂覆氟树脂而形成非球面部分; 设置有在紫外线区域发射光束的激光束源的紫外线发射装置和具有至少一个上述非球面透镜的物镜; 以及设置有在紫外线区域发射光束的激光束源的光盘记录装置,用于根据数据信号调制从激光束源发射的激光束的强度的光强调制装置; 和上述物镜。
    • 29. 发明授权
    • Optical pickup apparatus employing nonpolarization beam splitter and
quarter wavelength plate
    • 采用非偏振光束分离器和四分之一波长板的光学拾取装置
    • US5473154A
    • 1995-12-05
    • US224170
    • 1994-04-07
    • Naoya EguchiAtsushi Fukumoto
    • Naoya EguchiAtsushi Fukumoto
    • G11B7/135G01J1/20
    • G11B7/1365
    • An optical pickup apparatus for irradiating a light beam on an optical recording medium for recording or reproduction, including a light source, an objective lens, a nonpolarization beam splitter, a photodetector, and a 1/4 wavelength plate. The objective lens focuses the light beam radiated from the light source on to the recording layer of the optical recording medium. The nonpolarization beam splitter is disposed between the objective lens and the light source and separates the light beam emitted from the light source and the light beam reflected by the recording layer of the optical recording medium. The photodetector receives the beam of light reflected by the recording layer of the optical recording medium which has been separated by the nonpolarization beam splitter and deflected 90.degree. in optical path. The 1/4 wavelength plate is disposed on the path of emission of the light beam emitted from the light source between the nonpolarization beam splitter and the optical recording medium.
    • 一种用于将光束照射在用于记录或再现的光学记录介质上的光学拾取装置,包括光源,物镜,非偏振分束器,光电检测器和1/4波长板。 物镜将从光源照射的光束聚焦到光记录介质的记录层。 非极化分束器设置在物镜和光源之间,并且分离从光源发射的光束和由光记录介质的记录层反射的光束。 光电检测器接收由非极化分束器分离的光记录介质的记录层反射的光束,并在光路中偏转90°。 1/4波长板设置在从非极化分束器和光学记录介质之间的光源发射的光束的发射路径上。
    • 30. 发明授权
    • Optical pickup apparatus and method for adjusting optical axis thereof
    • 光拾取装置及其光轴调整方法
    • US5402407A
    • 1995-03-28
    • US78038
    • 1993-06-18
    • Naoya EguchiFumisada Maeda
    • Naoya EguchiFumisada Maeda
    • G11B7/125G11B7/22H01S3/02H01S3/109
    • H01S3/025G11B7/125G11B7/127G11B7/22H01S3/0071H01S3/042H01S3/0627H01S3/09415H01S3/109
    • A method for the optical axis of an optical pickup apparatus includes the step of adjusting the optical axis of a beam expander for enlarging the diameter of a light beam outgoing from a laser light beam radiating device into coincidence with the optical axis of the light beam radiated from the laser light beam radiating device. The laser light beam radiating device includes a non-linear optical crystal element and is adapted for radiating a second harmonic laser light beam. The method also includes the step of mounting the beam expander having adjusted its optical axis, and a step of adjusting, with the beam expander mounted on the laser light radiating device, the optical axis of an optical system converging the laser light beam radiated from the laser light beam radiating device so that the optical axis is brought into coincidence with the optical axis of the laser beam radiated from the laser light beam radiating device.
    • 光学拾取装置的光轴的方法包括调整光束扩展器的光轴的步骤,用于将从激光束辐射装置出射的光束的直径扩大为与辐射的光束的光轴重合 从激光束辐射装置。 激光束辐射装置包括非线性光学晶体元件,并适于辐射二次谐波激光束。 该方法还包括安装调整其光轴的光束扩展器的步骤,以及调整安装在激光发射装置上的光束扩展器的光学系统的光轴,该光学系统的光轴会聚从 激光束辐射装置,使得光轴与从激光束辐射装置辐射的激光束的光轴重合。