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    • 22. 发明授权
    • Optical pickup device and optical disc device
    • 光拾取装置和光盘装置
    • US06314064B1
    • 2001-11-06
    • US09172621
    • 1998-10-15
    • Mitsunori UedaTakeshi KuboJunichi SuzukiSatoshi SakamotoHiroshi Kawamura
    • Mitsunori UedaTakeshi KuboJunichi SuzukiSatoshi SakamotoHiroshi Kawamura
    • G11B712
    • G11B7/1374G11B7/08G11B7/09G11B7/0912G11B7/0935G11B7/0943G11B7/123G11B7/131G11B7/1356G11B7/139G11B2007/0006
    • An optical pickup device has a first optical system including a double lens type lens unit having a forward lens arranged facing an optical disc and a backward lens having an optical axis coincident with the forward lens. The optical pickup device also has a second optical system including an objective lens and first and second gap detection photodetectors for detecting the separation between the signal readout surface of the optical disc and the forward lens of the double lens type lens unit. The optical pickup device also includes a bobbin provided with the double lens type lens unit of the first optical system and with the objective lens of the second optical system and an electromagnetic driving unit for driving the bobbin in a first direction parallel to the optical axis of the objective lens and that of the forward lens of the double lens type lens unit and in a second direction normal to the optical axes. With the optical pickup device, the objective lens unit can be improved in operational reliability and the device in its entirety can be reduced in size.
    • 光拾取装置具有第一光学系统,该第一光学系统包括具有面向光盘的正射透镜的双透镜型透镜单元和具有与前透镜重合的光轴的后透镜。 光学拾取装置还具有包括物镜的第二光学系统和用于检测光盘的信号读出表面与双透镜型透镜单元的前向透镜之间的间隔的第一和第二间隙检测光电探测器。 光学拾取装置还包括一个设置有第一光学系统的双透镜型透镜单元和第二光学系统的物镜的线轴和一个电磁驱动单元,用于沿平行于光轴的第一方向驱动线轴 物镜和双透镜型透镜单元的前透镜的物镜和与光轴垂直的第二方向。 利用光学拾取装置,可以提高物镜单元的操作可靠性,整体上可以减小装置的尺寸。
    • 28. 发明授权
    • Projection type television apparatus
    • 投影型电视机
    • US5144417A
    • 1992-09-01
    • US631151
    • 1990-12-20
    • Kazuo TsukagoshiHiroshi TetsudaHiroshi Kawamura
    • Kazuo TsukagoshiHiroshi TetsudaHiroshi Kawamura
    • G02B5/00G02B5/28G02B27/00H01J31/10H04N5/74H04N9/31
    • H04N9/31
    • In a projection type television apparatus, a first and a second color selecting device are located on an optical light path passing through a cathode ray tube and a series of projection lenses are disposed in front of the cathode ray tube without a color selecting device therein. The first color selecting device has a high refractive factor to light having a wavelength of 570nm or more and the second color selecting device has a high reflection factor or a high absorption factor to light having a wavelength of 520nm or less. With this color selecting device, the range of color reproduction can be much more improved. This thus causes an increased degree of color purity of green light at the central and peripheral areas of the cathode ray tube. Moreover, with this arrangement, it becomes easy to conserve the characteristic of the color selecting devices and to facilitate the manufacturing operation.
    • 在投射型电视机中,第一和第二颜色选择装置位于通过阴极射线管的光学路径上,并且一系列投影透镜设置在阴极射线管的前面,而其中没有选色装置。 第一颜色选择装置对波长为570nm以上的光具有高折射率,第二颜色选择装置对波长为520nm以下的光具有高反射率或高吸收系数。 利用该选色装置,可以进一步提高色彩再现的范围。 因此,阴极射线管的中央和外围区域的绿光的颜色纯度提高。 此外,通过这种布置,变得容易地节省颜色选择装置的特性并且便于制造操作。