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41. 发明授权

US5437811A Liquid crystalline light modulating device and material 失效
标题翻译：液晶光调制装置和材料
公开(公告)号：US5437811A
公开(公告)日：1995-08-01
申请号：US969093
申请日：1992-10-30
申请人： J. William Doane , Deng-ke Yang , Liang-Chy Chien
发明人： J. William Doane , Deng-ke Yang , Liang-Chy Chien
IPC分类号： C09K19/02 , C09K19/54 , C09K19/58 , G02F1/01 , G02F1/1333 , G02F1/1334 , G02F1/137 , C09K19/52
CPC分类号： C09K19/02 , C09K19/542 , C09K19/544 , C09K19/586 , G02F1/1334 , G02F1/13718 , G02F1/0131 , G02F2001/13345 , G02F2001/13347 , G02F2001/13775
摘要： A new liquid crystalline light modulating cell and material are characterized by liquid crystalline light modulating material of liquid crystal and polymer, the liquid crystal being a chiral nematic liquid crystal having positive dielectric anisotropy and including chiral material in an amount effective to form focal conic and twisted planar textures, the polymer being distributed in phase separated domains in the liquid crystal cell in an amount that stabilizes the focal conic and twisted planar textures in the absence of a field and permits the liquid crystal to change textures upon the application of a field. In one embodiment, the material is light scattering in a field-OFF condition and optically clear in a field-ON condition, while in another embodiment, the material is optically clear in a field-OFF condition and light scattering in a field-ON condition. In still another embodiment, the material exhibits stability at zero field in a colored, light reflecting state, a light scattering state and multiple stable reflecting state therebetween, as well as being optically clear in the presence of a field.
摘要翻译：新型液晶光调制元件和材料的特征在于液晶和聚合物的液晶光调制材料，液晶是具有正介电各向异性的手性向列液晶，并且包括有效形成焦圆锥和扭曲的量的手性材料平面纹理，聚合物在液晶单元中以相分离的畴分布，其量在不存在场的情况下稳定焦锥和扭曲的平面纹理，并且允许液晶在施加场时改变纹理。在一个实施例中，该材料是在场关断状态下的光散射并且在场导通条件下是光学透明的，而在另一实施例中，该材料在场关闭状态下是光学透明的并且在场导通条件下的光散射。在另一个实施方案中，该材料在彩色光反射状态下的零场稳定性，在其间具有光散射状态和多个稳定的反射状态，以及在场的存在下光学清晰。

42. 发明授权

US4648274A Photoelastic measuring transducer and accelerometer based thereon 失效
标题翻译：基于光弹测量传感器和加速度计
公开(公告)号：US4648274A
公开(公告)日：1987-03-10
申请号：US763152
申请日：1985-08-07
申请人： Michael N. Trainer
发明人： Michael N. Trainer
IPC分类号： G01D5/26 , G01H9/00 , G01L1/24 , G02F1/01 , G01B11/18
CPC分类号： G02F1/0131 , G01H9/00
摘要： A photoelastic transducer is constructed with a photoelastic element receiving a 45.degree. polarized light beam with a wave plate providing a 90.degree. phase displacement in its orthogonal components. The element has reflective surface coatings to produce multiple internal reflections so as to lengthen the optical path, and increase the sensitivity of the unit. Analysis of the orthogonal outputs can be according to the difference divided by the sum with one of the outputs being multiplied by the ratio of the D.C. component of the other output to its D.C. component, for the purpose of compensating for changes in tramsmission of the two signals. Alternatively, the signal analysis can be in accordance with the difference between the rates of change of the two signals with each rate of change being multiplied by a factor which is proportional to the square root of the ratio of the other signal to the present signal, for the purpose of compensating for changes in the wave plate dimensions due to factors such as temperature change.
摘要翻译：光弹性传感器由光弹性元件构成，光弹元件接收45°偏振光束，其波片在其正交分量中提供90°相位位移。该元件具有反射表面涂层以产生多个内部反射，以便延长光路，并增加单元的灵敏度。正交输出的分析可以根据除以与其中一个输出相乘的和乘以另一个输出的直流分量与其直流分量的比的差值，以补偿两个交通事件的交通变化信号。或者，信号分析可以根据每个变化率的两个信号的变化率之间的差乘以与另一个信号与当前信号的比率的平方根成比例的因子，为了补偿由于诸如温度变化的因素导致的波片尺寸的变化。

43. 发明授权

US4561718A Photoelastic effect optical waveguides 失效
标题翻译：光弹效应光波导
公开(公告)号：US4561718A
公开(公告)日：1985-12-31
申请号：US525067
申请日：1983-08-22
申请人： Arthur R. Nelson
发明人： Arthur R. Nelson
IPC分类号： G02B6/30 , G02F1/01 , G02F1/313 , G02B6/10
CPC分类号： G02F1/3132 , G02B6/30 , G02F1/0131 , Y10T29/41
摘要： An optical waveguide apparatus provides for single-mode and multimode switching or modulation of light wave energy with reduced bias voltages. Optical channels are formed in a crystal substrate by depositing film stripes thereon to cause stress-induced changes in the relative refractive index. Coupling or switching of light waves between the channels is provided by applying a bias which is of reversed polarity at adjacent film stripes, thereby augmenting or diminishing the stress in individual channels. By allowing operation with close spacing of the electrodes and using the enhancement in refractive index change of the stressed substrate in combination with the applied bias, the required control voltage is substantially reduced.
摘要翻译：光波导装置提供具有降低的偏置电压的单模和多模开关或调制光波能量。通过在其上沉积膜条而在晶体基板中形成光通道，引起应力引起的相对折射率变化。通过在相邻薄膜条上施加相反极性的偏压来提供通道之间的光波的耦合或切换，从而增强或减小各个通道中的应力。通过允许电极的间隔较小的操作并且与所施加的偏压结合使用应力衬底的折射率变化的增强，所需的控制电压显着降低。

44. 发明授权

US4010632A Piezooptical measuring transducer 失效
标题翻译：压电测量传感器
公开(公告)号：US4010632A
公开(公告)日：1977-03-08
申请号：US654733
申请日：1976-02-03
申请人： Isaak Isaevich Slezinger , Georgy Mironovich Belitsky , Vladimir Alexandrovich Shiryaev , Jury Vasilievich Mironov
发明人： Isaak Isaevich Slezinger , Georgy Mironovich Belitsky , Vladimir Alexandrovich Shiryaev , Jury Vasilievich Mironov
IPC分类号： G01L1/16 , G01B11/16 , G01D5/34 , G01L1/24 , G02F1/01
CPC分类号： G01D5/344 , G01B11/18 , G01L1/241 , G02F1/0131
摘要： A piezooptical measuring transducer comprises two light sources connected to a square-pulse generator so that the luminous fluxes of each light source pass alternately through a polarizer common for both fluxes, phase-shifting plates individual for each flux, an elastic element common for both fluxes, sensitive to variations of mechanical stresses therein caused by changes in the measurand, an analyzer common for both fluxes, all placed in that order downstream of the light sources across the fluxes, the latter being alternately incident upon a photocell. The phase-shifting plates are oriented so that their axes of maximum velocity of light propagation are perpendicular to each other.
摘要翻译：压电测量传感器包括连接到方波脉冲发生器的两个光源，使得每个光源的光通量交替地穿过两个通量的共用偏振器，每个通量单独的相移板，两个通量共同的弹性元件对其中的机械应力的变化敏感，这是由被测量的变化引起的，两个通量共同的分析仪，全部放置在光源横跨焊剂的下游，后者交替地入射到光电管上。相移板被定向成使得它们的最大光传播速度的轴线彼此垂直。

45. 发明授权

US3782806A Bistable optical switch utilizing lead phosphate or lead strontium phosphate crystals 失效
标题翻译：使用磷酸铅或铅酸锶晶体的双稳态光开关
公开(公告)号：US3782806A
公开(公告)日：1974-01-01
申请号：US3782806D
申请日：1972-10-27
申请人： DU PONT
发明人： BARKLEY J , BRIXNER L
IPC分类号： G02F1/01 , G02F1/05 , G02F1/24
CPC分类号： G02F1/05 , G02F1/0131
摘要： Lead phosphate and certain mixed phosphates of lead and strontium are pure ferroelastic materials which can be switched from one strain state to another by mechanical stress. The crystals are transparent to visible radiation and the strain states are biaxially birefringent, the optic axes of adjacent domains separated by a domain wall lying in different spatial directions. Accordingly, if a suitable polarizer and analyzer is employed to extinguish light passing through one strain state, the strain state to which it can be switched will transmit light. Thus is there provided mechanically actuated optical switch. The optical properties of the domain wall likewise differ from either adjacent domain and in conjunction with spatial filtering (and/or optionally polarization filtering) can be used to provide mechanically actuated line scanners.
摘要翻译：铅和锶的某些混合磷酸盐是纯铁弹性材料，可以通过机械应力从一个应变状态切换到另一个应变状态。晶体对可见光辐射是透明的，并且应变状态是双轴双折射的，相邻畴的光轴由位于不同空间方向的畴壁分开。因此，如果使用适当的偏振器和分析器来熄灭通过一个应变状态的光，则可以切换到其的应变状态将透射光。因此，提供了机械致动的光开关。畴壁的光学特性同样不同于相邻区域并且与空间滤波（和/或可选的偏振滤波）一起可用于提供机械致动的线扫描仪。

46. 发明授权

US3636359A Optical nonmechanical feedback control of ellipticity modulators 失效
标题翻译：光学调制器的光学非机械反馈控制
公开(公告)号：US3636359A
公开(公告)日：1972-01-18
申请号：US3636359D
申请日：1967-04-13
申请人： CARY INSTRUMENTS
发明人： HOOPER PAIGE B
IPC分类号： G02F1/01 , G01J , G02F1/26 , H01J39/12
CPC分类号： G02F1/0131
摘要： The invention concerns simplified automatic control of the peak birefringence of a modulator which is operable upon a linearly polarized beam of radiation to derive a modified beam having cyclically varying elliptical polarization. Simplified automatic compensation of the electrical drive signal applied to the modulator drive transducer functions solely in response to variations in the character of a beam of radiation that has passed through the modulator.

47. 发明授权

US3600611A Elasto-optic device with mechanical bias 失效
标题翻译：具有机械偏置的ELASTO-OPTIC DEVICE
公开(公告)号：US3600611A
公开(公告)日：1971-08-17
申请号：US3600611D
申请日：1970-03-18
申请人： KETTERING SCIENT RESEARCH INC
发明人： TREHARNE RICHARD W
IPC分类号： G02B27/28 , G02F1/01 , H01V7/00 , G02F1/24
CPC分类号： G02F1/0131 , G02B27/281
摘要： A device for modulating the intensity of a beam of light includes a pair of polarizing filters, the polarization plane angles of which are crossed, and a fused quartz light transmitting element mounted between the polarizing filters with its preferred axis oriented at 45* to the filters. The element is made to exhibit birefringence by mechanical stress imposed by a piezoelectric device mechanically attached to one side of the element. A second piezoelectric device is attached to the other side of the element, and supplies an output to control the frequency of an oscillator circuit to maintain the frequency of oscillation of the assembly at resonance. The light transmitting element and the piezoelectric devices are mounted in a metal ring which is provided with an adjustment so that mechanical force may be applied to the element through the piezoelectric devices to bias the element thereby producing a quarter wave retardation which improves the efficiency of the device.

48. 发明授权

US1954947A Electrooptical method and apparatus 失效
标题翻译：电光法和仪器
公开(公告)号：US1954947A
公开(公告)日：1934-04-17
申请号：US52006431
申请日：1931-03-04
申请人： RCA CORP
发明人： PAJES WOLF S
IPC分类号： G02F1/01
CPC分类号： G02F1/0131

49. 发明授权

US10502969B2 3D imaging method and apparatus for alternately irradiating first and second polarized light 有权
公开(公告)号：US10502969B2
公开(公告)日：2019-12-10
申请号：US15843994
申请日：2017-12-15
申请人： GUANGZHOU UC NETWORK TECHNOLOGY CO., LTD.
发明人： Jie Liang , Yankun Zhen
IPC分类号： G02B5/30 , G02B27/22 , G02B27/26 , H04N13/337 , H04N13/341 , H04N13/398 , G02B27/28 , H04N13/305 , G02F1/01 , G02F1/07 , G02F1/09
CPC分类号： G02B27/2264 , G02B5/3083 , G02B27/26 , G02B27/283 , H04N13/305 , H04N13/337 , H04N13/341 , H04N13/398 , G02F1/0131 , G02F1/0136 , G02F1/07 , G02F1/09
摘要： The present application discloses a 3D imaging method and apparatus, which divide a source 3D image light into two polarized light beams carrying image information through a birefringence effect, adjust optical paths of the two polarized light beams obtained through birefringence, and control the two polarized light beams to be alternately irradiated, thereby achieving 3D imaging; since the implementation of the above imaging method only requires one imaging apparatus having corresponding functions, the present application can simplify the system structure and reduce the system cost relative to a conventional 3D projection technology that requires two imaging devices; moreover, a viewer can directly see, with no need to wear corresponding 3D glasses, a 3D image due to the parallax caused by alternate irradiation of two polarized light beams carrying image information out of a projection device.

50. 发明授权

US10036903B2 Photoelastic modulator having symmetric structure and forty-five degree double-drive photoelastic modulator 有权
公开(公告)号：US10036903B2
公开(公告)日：2018-07-31
申请号：US15149795
申请日：2016-05-09
申请人： North University of China
发明人： Zhibin Wang , Kewu Li , Rui Zhang , Youhua Chen , Yuanyuan Chen , Jinhua Li , Xinglai Liu , Changqing Yang
IPC分类号： G02F1/01 , G02F1/00
CPC分类号： G02F1/0131 , G02F1/0072 , G02F1/0136
摘要： The present invention relates to a Photoelastic Modulator (PEM), particularly to a novel polarized light modulator structure based on a photoelastic effect. The PEM, which controls driving voltages of two groups of piezoelectric actuators, is able to implement polarized light modulation having a relatively large optical path difference, and polarized light modulator having a fast modulation shaft moving circumferentially, and the PEM operates stably without a moving component. The present invention includes the piezoelectric actuators, a light pass crystal and a driver controller. Two light pass faces of the light pass crystal are parallel regular octagons directly facing each other, and identical rectangles are formed by side faces of the light pass crystal. The piezoelectric actuators are in soft connection with middle positions of the rectangles by connection rubber layers. The width directions of the piezoelectric actuators are consistent with the direction of the light pass thickness of the light pass crystal, and the widths are slightly larger than the light pass thickness. The piezoelectric actuators are connected with electric output ends on the driver controller by electric adapters. This aspect is mainly applied to PEMs.

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