Movable filter device
    1.
    发明授权
    Movable filter device 失效
    活动式过滤装置

    公开(公告)号:US06226460B1

    公开(公告)日:2001-05-01

    申请号:US09506321

    申请日:2000-02-18

    IPC分类号: G03B7100

    CPC分类号: G02B26/007 G02B26/023

    摘要: A movable filter device comprises a rotary plate for holding an optical filter, a holding plate for holding the rotary plate rotatably at a pivot point, stopper pins, and a torsion coil spring. The torsion coil spring has one end coupled to the holding plate and the other end coupled to the rotary plate, and generates a force for extending both ends thereof. The force generated by the torsion coil spring prevents the rotary plate from stopping at positions other than those defined by the stopper pins. The rotary plate has slender portions of low rigidity for absorbing the impact of collision between the rotary plate and stopper pins.

    摘要翻译: 可移动过滤装置包括用于保持滤光器的旋转板,用于将旋转板可旋转地保持在枢转点处的保持板,止动销和扭转螺旋弹簧。 扭转螺旋弹簧的一端联接到保持板,另一端联接到旋转板,并且产生用于延伸其两端的力。 由扭力螺旋弹簧产生的力防止旋转板停止在止动销定义的位置以外的位置。 旋转板具有低刚度的细长部分,用于吸收旋转板和止动销之间的碰撞冲击。

    Optical head apparatus including concentric, periodic grating in a
waveguide
    2.
    发明授权
    Optical head apparatus including concentric, periodic grating in a waveguide 失效
    光头设备包括波导中的同心圆周期光栅

    公开(公告)号:US4991919A

    公开(公告)日:1991-02-12

    申请号:US415224

    申请日:1989-10-18

    摘要: This invention provides an optical head apparatus in which a grating coupler (8), which is formed on a circular region which has a center on an axis (18) and has a periodical structure with dents and projections in a configuration of concentric circles or spirals around the axis (18), input-couples laser light (7) emitted from a semiconductor laser (5) and turns it into waveguided light (16B) which transmits in a waveguiding layer (15B). The waveguided light (16B) is converted, in a region where the waveguiding layer (15B) and a waveguiding layer (15A) overlap each other, to waveguided light (16A) which transmits in the waveguiding layer (15A). By a grating coupler (9), formed on a ring-shaped area which is located around the axis (18), which has a periodic structure with dents and projections of a configuration of concentric circles or spirals around the axis (18), the waveguided light (16A) is radiated and focused onto points (FA), (FB) and (FC) which are located on the axis (18). Light reflected from a reflecting surface (19) is input-coupled by the grating coupler (9) and is converted to waveguided light (21) which transmits through the waveguiding layer (15A) toward the center. The waveguided light (21) is radiated at the innermost edge of the waveguiding layer (15A) and the amount of radiated light is detected by a light detector (10) to obtained control signal and playback signals.

    摘要翻译: PCT No.PCT / JP88 / 01344 Sec。 371日期:1989年10月18日 102(e)日期1989年10月18日PCT提交1988年12月28日PCT公布。 出版物WO89 / 06424 日期:1989年7月13日。本发明提供了一种光学头装置,其中形成在圆形区域上的光栅耦合器(8),该圆形区域具有在轴线(18)上的中心并且具有凹陷和突起的周期结构 围绕轴线(18)的同心圆或螺旋的构造,从半导体激光器(5)发射的输入耦合激光(7),并将其转换成在波导层(15B)中透射的波导光(16B)。 波导层(16B)在波导层(15B)和波导层(15A)彼此重叠的区域中被转换成在波导层(15A)中透射的波导光(16A)。 通过形成在围绕轴线(18)的环形区域上的光栅耦合器(9),该环形区域具有围绕轴线(18)的同心圆或螺旋构型的凹陷和突起的周期性结构, 波导光(16A)被辐射并聚焦到位于轴线(18)上的点(FA),(FB)和(FC)上。 从反射面(19)反射的光被光栅耦合器(9)输入耦合,并被转换成通过波导层(15A)向中心透射的波导光(21)。 波导光(21)被辐射在波导层(15A)的最内边缘,并且由光检测器(10)检测辐射光量,以获得控制信号和重放信号。

    Optical head apparatus including a waveguide layer with concentric or
spiral periodic structure
    3.
    发明授权
    Optical head apparatus including a waveguide layer with concentric or spiral periodic structure 失效
    光学头装置,包括具有中心或螺旋周期结构的波导层

    公开(公告)号:US5200939A

    公开(公告)日:1993-04-06

    申请号:US474757

    申请日:1991-04-04

    摘要: An optical head arranged in such a manner that light emitted from a semiconductor laser (8) is inputted and coupled in a waveguide layer (3C) by a grating coupler (4C) having a concentric or spiral structure formed by concavities and convexities so as to convert light into waveguide light (12C) passing toward to outer periphery in the layer, the waveguide light (12C) is shifted at the outermost peripheral portion of the waveguide layer (3C) to a waveguide layer (3B) so as to convert the waveguide light (12C) into waveguide light (12B), the waveguide light (12B) is radiated by a grating coupler (4B) having a concentric or spiral periodical structure, the concentrically polarized (or radially polarized) light (13) is converted into linearly polarized light (14) by a polarizing element (10B) so as to be converged on the reflection surface (16) of the optical disc, light reflected from the reflection surface (16) is again converted into concentrically polarized (or radially polarized) light (17A) and (17B) by the polarizing element (10B) so as to be inputted and coupled in waveguide layers (3A) and (3B) by a grating coupler (4A) and the grating coupler (4B), and then to be turned into waveguide light (18A) and (18B) each of which passes through the layer, and the waveguide light (18A) and (18B) is radiated at the end portions of the waveguide layers (3A) and (3B) so as to be respectively received by photo detectors (6A) and (6B) so that a control signal and a reproduction signal are obtained.

    摘要翻译: PCT No.PCT / JP89 / 00796 Sec。 371日期:1991年4月4日 102(e)日期1991年4月4日PCT PCT 1989年8月2日PCT公布。 WO90 / 01768 PCT出版物 日期:1990年2月22日。一种光学头,以从半导体激光器(8)发出的光输入并通过形成有同心或螺旋结构的光栅耦合器(4C)耦合在波导层(3C) 通过凹凸来将光转换成通过该层的外周的波导管(12C),波导管(12C)在波导层(3C)的最外周部分移动到波导层(3B) ),以将波导光(12C)转换为波导光(12B),波导光(12B)由具有同心或螺旋周期结构的光栅耦合器(4B)辐射,同心偏振(或径向偏振)的光 (13)被偏振元件(10B)转换成线偏振光(14),以便会聚在光盘的反射面(16)上,从反射面(16)反射的光再次转换为同心圆 极化(或辐射) 通过偏振元件(10B)输入并耦合在波导层(3A)和(3B)中,由光栅耦合器(4A)和光栅耦合器(4B)耦合在一起, 然后变成每个通过该层的波导光(18A)和(18B),并且波导光(18A)和(18B)在波导层(3A)和(3B)的端部处被辐射 ),以便分别由光电检测器(6A)和(6B)接收,从而获得控制信号和再现信号。

    Light deflecting device
    4.
    发明授权
    Light deflecting device 失效
    光偏转装置

    公开(公告)号:US5193130A

    公开(公告)日:1993-03-09

    申请号:US474763

    申请日:1990-03-20

    IPC分类号: G02F1/1333 G02F1/295

    CPC分类号: G02F1/1326 G02F1/2955

    摘要: The voltage signal applied between a conductive thin film (2) and a transparent conductive thin film (6) changes the aligning direction of a liquid crystal layer (5) near the surface of a waveguide layer (4) so that the refractive index of the liquid crystal (5) for waveguide light (8) is changed thereby to change the equivalent refractive index for the waveguide light (8), and thus the diffraction angle of the radiated light (9) from the waveguide layer (4) including the cyclic structure (3G) formed therein is also changed to deflect the radiated light. If the waveguide light (8) is propagated in the direction perpendicular to the longitudinal direction of the arrangement of the cyclic structure (3G), which is arranged in the form of a concentric circle, and the radiated light (9) from the waveguide layer (4) is focused at a focusing point outside the waveguide layer (4), the deflection of the radiated light (9), which is caused by applying a voltage signal between the conductive thin film (2) and the transparent conductive thin film (6), produces a displacement of the focusing point. In particular, if the conductive thin film (2) or the transparent conductive thin film (6) is divided into a large number of sections and voltage signals are individually applied to such sections, the focusing point (F) can be displaced to any optional point.

    摘要翻译: PCT No.PCT / JP89 / 00797 Sec。 371 1990年3月20日第 102(e)1990年3月20日PCT PCT 1989年8月2日PCT。 出版物WO90 / 0172200 日期:1990年2月22日。施加在导电薄膜(2)和透明导电薄膜(6)之间的电压信号改变靠近波导层(4)表面的液晶层(5)的对准方向, 使得用于波导光(8)的液晶(5)的折射率改变,从而改变波导光(8)的等效折射率,因此来自波导的辐射光(9)的衍射角 包括其中形成的环状结构(3G)的层(4)也被改变以偏转辐射光。 如果波导光(8)沿垂直于以同心圆形排列的循环结构(3G)的布置的纵向的方向传播,并且辐射光(9)从波导层 (4)聚焦在波导层(4)外部的聚焦点处,通过在导电薄膜(2)和透明导电薄膜(2)之间施加电压信号而引起的辐射光(9)的偏转 6),产生聚焦点的位移。 特别地,如果导电薄膜(2)或透明导电薄膜(6)被分成多个部分,并且电压信号被分别施加到这些部分,则聚焦点(F)可以移位到任何可选的 点。