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81. 发明授权

US11340478B2 Optical transmitter 有权
公开(公告)号：US11340478B2
公开(公告)日：2022-05-24
申请号：US17294980
申请日：2019-12-05
申请人： Nippon Telegraph and Telephone Corporation
发明人： Toshihiro Ito , Ken Tsuzuki , Masayuki Takahashi , Kiyofumi Kikuchi
IPC分类号： H04B10/50 , G02F1/01 , G02F1/21
摘要： Provided is an optical transmitter having improved frequency characteristics by controlling the band by using components constituting the optical transmitter. An optical transmitter including an optical modulator that includes a traveling-wave electrode and a terminating resistor, and an optical modulator driver configured to drive the optical modulator, in which a characteristic impedance of a transmission line connecting the optical modulator driver and the optical modulator is 20% or more higher than a characteristic impedance of the optical modulator, and an electrical length of the transmission line is 1/20 or more and ½ or less of a wavelength corresponding to a 3 dB band frequency of an electrical signal driving the optical modulator.

82. 发明申请

US20220155618A1 Diffractive Deep Neural Network (D2NN) Processing Using a Single Modulation Layer 有权
$Diffractive Deep Neural Network (D2NN) Processing Using a Single Modulation Layer$
公开(公告)号：US20220155618A1
公开(公告)日：2022-05-19
申请号：US17587956
申请日：2022-01-28
申请人： Huawei Technologies Co., Ltd.
发明人： Xiang Liu , Yongxi Tan , Ning Cheng , Jin Yang
IPC分类号： G02F1/01 , G02B27/42
摘要： An apparatus comprises a first mirror; a second mirror; a modulation layer positioned between the first mirror and the second mirror and comprising a plurality of modulation regions; a diffraction layer positioned between the modulation layer and the second mirror, and an input port admitting a light beam into the apparatus. The light beam passes through the diffraction layer and is modulated by the modulation layer to create a first modulated beam before being reflected by the first mirror, the first mirror reflecting the first modulated beam toward the second mirror, the second mirror reflecting the first modulated beam toward the modulation layer to be modulated for at least a second time.

83. 发明申请

US20220151485A1 APPARATUS AND SYSTEM FOR THE PERFORMANCE OF OPTOMETRIC MEASUREMENTS AND METHOD FOR ADJUSTING THE OPTICAL POWER OF AN ADJUSTABLE LENS 有权
公开(公告)号：US20220151485A1
公开(公告)日：2022-05-19
申请号：US17435823
申请日：2020-03-04
申请人： CONSEJO SUPERIOR INVESTIGACIONES CIENTÍFICAS
发明人： Carlos DORRONSORO DÍAZ , Víctor RODRÍGUEZ LÓPEZ
IPC分类号： A61B3/032 , G02F1/01 , G02F1/19
摘要： An apparatus for performing optometric measurements includes an opto-adjustable lens, the optical power of which is adjustable, with the lens being controlled by a periodic signal configured for producing a periodic optical power wave over time. The apparatus also includes a component for the adjustment of the mean value of the periodic optical power wave. The apparatus further includes an optical projector system for projecting a plane of the opto-adjustable lens onto a plane external to the apparatus, and in that the periodic signal has an amplitude such that it produces an amplitude of the periodic optical power wave corresponding to a chromatic difference of focus between a first wavelength and a second wavelength of visible light which passes the opto-adjustable lens. A system for the performance of optometric measurements and a method for adjusting the optical power of an adjustable lens are related to the apparatus.

84. 发明申请

US20220146866A1 OPTICAL ISOLATOR 有权
公开(公告)号：US20220146866A1
公开(公告)日：2022-05-12
申请号：US17285051
申请日：2019-10-02
申请人： SHIN-ETSU CHEMICAL CO., LTD.
发明人： Akira YAHAGI , Masanori IKARI , Takuto MATSUMOTO
IPC分类号： G02F1/09 , G02F1/055 , G02F1/01 , C04B35/50
摘要： An optical isolator includes a Faraday rotator including a trivalent ion exchange TAG (terbium-aluminum garnet), and arranged around the Faraday rotator, a central hollow magnet and a first and a second hollow magnet units arranged to sandwich the central hollow magnet in an optical axis direction. A magnetic flux density B [T] in the Faraday rotator and an optical path length L [mm] where the Faraday rotator is arranged satisfy 0

85. 发明授权

US11320647B2 Methods and apparatus for modulating light with phase change materials 有权
公开(公告)号：US11320647B2
公开(公告)日：2022-05-03
申请号：US16263071
申请日：2019-01-31
申请人： Massachusetts Institute of Technology
发明人： Jeffrey Chou , Vladimir Liberman , Juejun Hu , Yifei Zhang , William Herzog , Jason Stewart , Christopher Roberts
IPC分类号： G02F1/01 , G02B26/06 , G02B26/02 , G02B5/20 , G02B27/09
摘要： Alloys of GeSbSeTe (GSST) can be used to make actively tunable infrared transmission filters that are small, fast, and solid-state. These filters can be used for hyperspectral imaging, 3D LIDAR, portable bio/chem sensing systems, thermal emission control, and tunable filters. GSST is a low-loss phase-change material that can switch from a low-index (n=3), amorphous state to a high-index (n=4.5), hexagonal state with low loss (k

86. 发明授权

US11314106B2 Light modulation device 有权
公开(公告)号：US11314106B2
公开(公告)日：2022-04-26
申请号：US16607520
申请日：2018-04-30
申请人： LG Chem, Ltd.
发明人： Min Jun Gim , Eun Jung Lim , Jung Sun You , Dong Hyun Oh , Hyun Jun Lee , Nam Hun Kim
IPC分类号： G02F1/1333 , G02C7/10 , G02F1/13363 , G02F1/137 , B32B7/035 , G02F1/01 , G02F1/1343 , G02F1/153 , G02F1/1347 , G02B27/01 , G02F1/13 , G02F1/1335
摘要： A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, wherein the active liquid crystal layer is capable of switching between a first orientation state and a second orientation state when a voltage is applied, and a polarizer, wherein each of the first and second polymer film substrates have in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.

87. 发明申请

US20220107411A1 POLARIZATION SEPARATION IN REMOTE IMAGING SYSTEMS 有权
公开(公告)号：US20220107411A1
公开(公告)日：2022-04-07
申请号：US17062618
申请日：2020-10-04
申请人： SiLC Technologies, Inc.
发明人： Prakash Koonath , Shuren Hu , Mehdi Asghari , Bradley Jonathan Luff , Behnam Behroozpour
IPC分类号： G01S17/32 , G01S7/499 , G01S7/481 , G02F1/01
摘要： Systems and methods described herein are directed to polarization separation of laser signals and/or incoming light signals associated with an imaging system, such as a Light Detection and Ranging (LIDAR) system. Example embodiments describe a system configured to direct incoming light signals to a polarization separator and capturing the two polarization states of the incoming light signals. In some instances, the laser signal may be converted into two different polarization states. The system may individually process the two polarization states of the incoming light signals along with the corresponding polarization state of the laser reference signal to extract information associated with reflecting objects within the field-of-view of the imaging system. The polarization separator may be a birefringent crystal positioned adjacent to an edge of a photonic integrated circuit (PIC) that is used for processing outgoing and incoming light signals associated with the imaging system.

88. 发明申请

US20220100008A1 METHODS FOR COMPUTATION-FREE WIDEBAND SPECTRAL CORRELATION AND ANALYSIS 有权
公开(公告)号：US20220100008A1
公开(公告)日：2022-03-31
申请号：US17467887
申请日：2021-09-07
申请人： RAM Photonics, LLC
发明人： Vahid Ataie
IPC分类号： G02F1/01 , G02F1/133 , H04B1/711 , H04J14/00 , G01B9/02
摘要： An apparatus for generating a set of spectral correlation coefficients of an input signal includes: a master laser configured to generate an optical frequency comb signal; a first optical modulator configured to modulate the optical frequency comb signal with an input signal to generate a plurality of spectral copies of the input signal; a dispersive element configured to delay the plurality of spectral copies of the input signal by a wavelength-dependent time delay; a second optical modulator configured to modulate the delayed plurality of spectral copies with a conjugate of the input signal; and an optical comb filter configured to integrate the conjugate modulated plurality of spectral copies of the input signal to generate a set of cyclic autocorrelation coefficients.

89. 发明授权

US11287677B2 Optical stack for privacy display 有权
公开(公告)号：US11287677B2
公开(公告)日：2022-03-29
申请号：US16713544
申请日：2019-12-13
申请人： ReaID Spark, LLC
发明人： Ben Ihas , Robert A. Ramsey , Graham J. Woodgate , Jonathan Harrold , Michael G. Robinson
IPC分类号： G02F1/13 , G02F1/01 , F21V8/00
摘要： A display apparatus comprises at least one spatial light modulator and at least one curved view angle control element that comprises plural retarders arranged between the display polariser of each spatial light modulator, and an additional polariser. The curvature of the view angle control element provides increased luminance uniformity for a head-on user and increased visual security to an off-axis snooper.

90. 发明授权

US11287649B2 Display device and display method 有权
公开(公告)号：US11287649B2
公开(公告)日：2022-03-29
申请号：US16511411
申请日：2019-07-15
申请人： BOE Technology Group Co., Ltd.
发明人： Tao Hong
IPC分类号： G02B27/01 , B60K35/00 , G02B27/28 , G02F1/01 , G02F1/03
摘要： A display device and a display method are provided, the display device including: a light source assembly, configured to output a first light ray carried with a first image to be displayed and a second light ray carried with a second image to be displayed, alternately; a first conversion element, arranged at a light exiting side of the light source assembly, and configured to convert the first light ray carried with the first image to be displayed into a first polarization light, and to convert the second light ray carried with the second image to be displayed into a second polarization light; and a light-splitting assembly and a imaging reflecting element, the light-splitting assembly being configured to direct the converted first light ray originating from the first conversion element towards the imaging reflecting element in a first direction, and to direct the converted second light ray originating from the first conversion element towards the imaging reflecting element in a second direction different from the first direction, and the imaging reflecting element being configured to receive and reflect the first light ray propagating in the first direction and the second light ray propagating in the second direction so as to form the first image and the second image, respectively; the first image and the second image are located at different distances from the imaging reflecting element in a same direction with respect to a predetermined observation location respectively.

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