| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Passive Optical Limiter Having Nonlinear Material | US12706930 | 2010-02-17 | US20100213356A1 | 2010-08-26 | Gerard Berginc; Patrick Feneyrou; Pierre-Antoine Bouit; Olivier Maury; Marie-Chantal Andraud |
| The invention relates to a passive optical limiter having a nonlinear material capable of switching in a predetermined optical band from a transparent state to an opaque state as a function of the power of an incident laser beam. The nonlinear material is an organic dye which comprises molecules derived from 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene into which a nitrogen atom is inserted at the meso position, referred to as aza-bodipy molecules, and which have conjugated π chains functionalized so as to exhibit absorption for two photons around an incident beam wavelength lying between 1.45 μm and 1.6 μm. | ||||||
| 42 | Optical device having nonmonotonic transfer function and applications using same | US10068472 | 2002-02-08 | US07518796B2 | 2009-04-14 | Edward H. Sargent; Lukasz Brzozowski |
| An entirely passive all-optical device, referred to as an optical hard limiter, includes alternating layers of materials having oppositely signed Kerr coefficients and substantially different linear indices of refraction, wherein the higher linear index material has the negative Kerr coefficient and the lower index material has the positive Kerr coefficient. The optical device has two distinct transmittance curves. Various optical devices and systems can be built from such optical hard limiters. | ||||||
| 43 | Light control apparatus having a device for controlling the input signal light of an optical transmission path | US10579499 | 2004-11-17 | US07488925B2 | 2009-02-10 | Kikuo Makita; Toshitaka Torikai |
| A light control apparatus includes a part for splitting an input light entering the light control apparatus through an optical fiber, a photoelectric conversion part for converting a monitor light into an electrical signal, and a third part for controlling the opening and closing of an optical transmission path for a signal light based on the electrical signal. The light power of an output light is controlled by the opening and closing amount of the optical transmission path which is controlled depending on the amount of the electrical signal output in accordance with the level of the monitor light. A semiconductor photovoltaic device capable of performing photoelectric conversion without using an external power source is used as the photoelectric conversion part. An optical shutter using a micromachine, or an optical device such as absorption-type modulator or refractive index-type modulator is used as the third part. | ||||||
| 44 | Systems and methods for limiting power using photo-induced anisotropy | US10877777 | 2004-06-25 | US07196794B2 | 2007-03-27 | Pengfei Wu; Reji Philip; Devulapalli V. G. L. N. Rao |
| Preferred embodiments of the present invention are directed at limiting power and controlling an output intensity of an optical system using photo-induced anisotropic materials. In a preferred embodiment, an azobenzene polymer film is used. The embodiments in accordance with the present invention include a cross-polarization system to provide clamping of the output intensity.A system for limiting power in accordance with a preferred embodiment of the present invention, includes a light source that provides an input light beam along a first optical path, a first polarizing element having a first polarization state positioned in the first optical path, a second polarizing element positioned in the first optical path having a second polarization state substantially orthogonal to the first polarization state, a sample having a photo-induced anisotropic material positioned in the first optical path, and a polarizer positioned in a second optical path at an angle of approximately 45 degrees to that of the input beam wherein an excitation beam provided in the second optical path spatially overlaps the input beam on the sample, and an output beam that is generated has a limited transmission value at high intensity. | ||||||
| 45 | Plasmon-photon coupled optical devices | US10865237 | 2004-06-10 | US07110154B2 | 2006-09-19 | John Ballato; David L. Carroll; Jeffrey R. Dimaio |
| The present invention is directed to optical devices. More specifically, the disclosed devices include a film defining a periodic array of surface elements so as to give rise to surface plasmon polaritons. The film also includes at least a single aperture having a diameter less than the wavelength of light. In one embodiment, the surface elements can be an array of anisotropic apertures and the films can act as a polarizer. The disclosed devices can also include a material having a variable refractive index substantially adjacent to the metal film. For example, the refractive index of the adjacent material can vary according to some characteristic of the light incident to the device, for instance, the intensity or the angle of incidence of the light. In this embodiment, resonant coupling of incident light with the SPP, and hence transmittivity of the device, can depend upon the nature of incident light. The disclosed devices can be useful in, for example, remote polarizers, polarization mode dispersion, isolators, multi-color displays, switches, such as can be controlled according to incident sunlight, or optical filters, such as for eye protection devices, filtering out possibly harmful light. | ||||||
| 46 | Methods and apparatuses for selectively limiting undesired radiation | US10703136 | 2003-11-06 | US07095026B2 | 2006-08-22 | John W. Devitt; Mark E. Greiner; Jeffrey J. Voelker; David R. Wade |
| An apparatus for selectively limiting undesired radiation from a scene which, in one embodiment, includes an optic that is operative to attenuate radiation by selectively losing transparency in response to radiation within a first wavelength band from a source. The loss of transparency affects the passage through the optic of radiation within a second wavelength band from that source. The optic can be positioned between a sensor and the scene such that the sensor is configured to receive radiation from the scene through the optic. In one embodiment, an optical limiter includes a plurality of such optics, wherein the optical limiter is configured to facilitate transmission of light corresponding to a scene, and wherein each optic is configured to receive a respective portion of the light corresponding to a respective portion of the scene. A light detector assembly and a method of limiting light energy are also included. | ||||||
| 47 | Optical power limiting material | US09746475 | 2000-12-21 | US06738203B2 | 2004-05-18 | Masanori Ando; Kenji Kamada; Kohei Kadono; Koji Ohta; Keiko Tawa; Takeyuki Tanaka |
| A main object of the present invention is to provide a novel optical power limiting material of high performance being less susceptible to damages caused by heat occurring when an intensified laser beam is irradiated, having reversible characteristic and exhibiting a stable optical power limiting effect; production of the optical power limiting is simple and economical. The optical power limiting material of the present invention comprises a transparent substrate and an oxide(s) of at least one metal selected from the group consisting of of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Nb, Mo, Ru, In, Sn, Sb, Ta, W, Re, Os, Ir and Bi. | ||||||
| 48 | Polymer 1D photonic crystals | US10391296 | 2003-03-19 | US06696142B2 | 2004-02-24 | Eric Baer; P. Anne Hiltner; James S. Shirk |
| A multilayer nonlinear dielectric optical structure is formed by coextruding at least two polymeric materials, components (a) and (b), using a multiplying element; the structure contains a plurality of alternating layers (A) and (B) represented by formula (AB)x, where x=2n, and n is the number of multiplying elements; at least one of the components (a) and (b) exhibits nonlinear optical response. These structures perform a variety of nonlinear optical functions including all-optical switching and passive optical limiting. | ||||||
| 49 | Optical switching device based on stable, non-absorbing optical hard limiters | US09933146 | 2001-08-20 | US20020109873A1 | 2002-08-15 | Erik V. Johnson; Edward H. Sargent |
| An optical switching device based on stable, non-absorbing optical hard limiters optically switches optical information from an input to a number of outputs based upon address information contained in the optical information. The optical switching device optically detects the location of the address bits in the optical information, optically samples the address bits, optically decodes the sampled address bits, optically activates an output based upon the decoded address bits, and optically outputs the optical information over the activated output. | ||||||
| 50 | Laser protection goggles | US351504 | 1982-02-23 | US4462661A | 1984-07-31 | Frank Witt |
| The invention is a laser ray eye protection device comprised of a laser detector, voltage controlled lens or lenses, and related interconnecting circuitry. The lenses remain in the normally transparent state until a laser ray is sensed by the detector which energizes the lenses into a state of opacity by the interconnecting circuitry. The invention may take on numerous specific embodiments. Various partial modifications and combinations thereof are described. | ||||||
| 51 | OPTICAL LIMITERS FOR FACILITATING APERTURE PROTECTION | US15716364 | 2017-09-26 | US20190094430A1 | 2019-03-28 | Tai Anh Lam |
| Various techniques provide optical limiters for facilitating aperture protection. In one example, a system includes an optical device. The optical device includes a photocathode configured to emit electrons in response to an applied voltage and an incident light. The optical device further includes a phase change material. At least a portion of the phase change material is configured to receive the electrons from the photocathode. The portion is further configured to transition from a first phase to a second phase in response to the electrons. The portion is further configured to reflect the incident light when the portion of the phase change material is in the second phase. Related methods and products are also provided. | ||||||
| 52 | Optical limiter, optical logic circuit, comparator, digital converter, optical transmission apparatus and optical processing method | US14561778 | 2014-12-05 | US09354483B2 | 2016-05-31 | Futoshi Izumi |
| An optical limiter includes a nonlinear medium that changes its own refractive index in accordance with an intensity of incident light, and outputs the incident light in a different direction depending on the refractive index, a first incident section by which reference light with a predetermined intensity and an optical signal with a modulated intensity is made incident on the nonlinear medium, a second incident section by which auxiliary light is made incident on a portion in the nonlinear medium through which the reference light and the optical signal pass, and an inverse output section that is provided at an incident position of the reference light outputted from the nonlinear medium when the optical signal is off, and outputs an optical signal obtained by inversion of the intensity of the incident light. | ||||||
| 53 | Broadband optical limiter based on nano-graphene and method of fabricating same | US13176506 | 2011-07-05 | US09243873B2 | 2016-01-26 | Wei Zhao; Boshan Zhao |
| The present invention in one aspect relates to a low-cost, nano-graphene based broadband optical limiter with limiting properties superior to current standards, carbon fullerenes (C60) solutions and carbon black suspensions. The broadband optical limiter includes a plurality of graphene nano-sheets, and a base material in which the plurality of graphene nano-sheets is distributed. The base material can be liquid or gel matrix. | ||||||
| 54 | BROADBAND GRAPHENE-BASED OPTICAL LIMITER FOR THE PROTECTION OF BACKSIDE ILLUMINATED CMOS DETECTORS | US14104472 | 2013-12-12 | US20150171234A1 | 2015-06-18 | Michael Ushinsky; Mitchell Haeri |
| An optical device may include a sacrificial limiter filter including at least one layer of graphene disposed on a substrate. The at least one layer of graphene may be configured to absorb and scatter at least a portion of electromagnetic radiation incident on the at least one layer of graphene. | ||||||
| 55 | Reflective Optical Limiter | US14343922 | 2012-09-12 | US20140233085A1 | 2014-08-21 | Ariela Donval; Yuval Ofir; Doron Nevo; Moshe Oron |
| An optical limiter comprises a glass backing, a glass cover, and a layer of a phase changing material placed between said glass backing and said glass cover, the phase changing material comprising a transparent matrix having embedded particles of material that changes its optical properties due to temperature induced phase change of said material. The optical properties may change from transparent to reflective, from transparent to refractive or from transparent to scattering. The phase changing material is preferably at least one material selected from the group consisting of the elements Antimony, Bismuth, Cadmium, Lead, Tin and Indium and low-melting-point alloys of two or more of these elements. Two or more layers of phase changing materials may be used in a stack configuration, with each of the phase changing materials having a unique melting temperature. | ||||||
| 56 | Non-linear Optical Response Materials | US13977366 | 2011-12-28 | US20130273345A1 | 2013-10-17 | Lay-Lay Chua; Peter Ho; Geok Kieng Lim |
| An optical-limiter is disclosed herein. In an embodiment, the optical limiter comprises chemically functionalized graphene substantially spaced apart as single sheets in a substantially transparent liquid cell or solid thin film. A method of fabricating an optical response material is also disclosed. | ||||||
| 57 | Optical image modulator and method of manufacturing the same | US13167486 | 2011-06-23 | US08432599B2 | 2013-04-30 | Yong-Chul Cho; Yong-Tak Lee; Yong-Hwa Park; Byung-Hoon Na; Bong-Kyu Jeong |
| An optical image modulator and a method of manufacturing the same. The optical image modulator includes a substrate, an N electrode contact layer formed on the substrate, a lower distributed Bragg reflection (DBR) layer, a quantum well layer, an upper DBR layer, and a P electrode contact layer sequentially stacked on the N electrode contact layer, a P electrode formed on the P electrode contact layer, and an N electrode formed on the N electrode contact layer. The N electrode is a frame that surrounds the lower DBR layer. | ||||||
| 58 | Phase-change materials and optical limiting devices utilizing phase-change materials | US12479311 | 2009-06-05 | US08259381B2 | 2012-09-04 | Anthony Bresenhan Kaye; Richard Forsberg Haglund, Jr. |
| An optical limiting structure includes a metal layer with a single metal particle or a plurality of metal particles spaced from each other so as to form an array, where the metal particles have sizes no greater than about 1000 nanometers. A phase-change material layer is disposed adjacent at least a portion of the metal layer, where the phase-change material layer includes a phase-change material. The optical limiting structure is configured to transition from a first optical state to a second optical state, where the optical limiting structure substantially limits transmittance of light of at least one wavelength through the optical limiting structure at the second optical state, and the at least one wavelength at which the optical limiting structure substantially limits transmittance of light is different from any wavelength of light at which transmittance is substantially limited through the phase-change material prior to integration into the optical limiting structure. | ||||||
| 59 | OPTICAL IMAGE MODULATOR AND METHOD OF MANUFACTURING THE SAME | US13167486 | 2011-06-23 | US20120140309A1 | 2012-06-07 | Yong-Chul CHO; Yong-Tak LEE; Yong-Hwa PARK; Byung-Hoon NA; Bong-Kyu JEONG |
| An optical image modulator and a method of manufacturing the same. The optical image modulator includes a substrate, an N electrode contact layer formed on the substrate, a lower distributed Bragg reflection (DBR) layer, a quantum well layer, an upper DBR layer, and a P electrode contact layer sequentially stacked on the N electrode contact layer, a P electrode formed on the P electrode contact layer, and an N electrode formed on the N electrode contact layer. The N electrode is a frame that surrounds the lower DBR layer. | ||||||
| 60 | LIGHT LIMITING WINDOW | US13000149 | 2009-06-18 | US20110170159A1 | 2011-07-14 | Ariela Donval; Boaz Nemet; Dornon Nevo; Moshe Oron |
| A passive optical power limiting window comprising a transparent optical input element, a transparent optical output element, and a power-limiting element disposed between these input and output elements for transmitting optical light from these input elements to these output elements, these optical power-limiting elements comprising an optical-limiting solid mixture containing particles of at least one material that produces reversible thermal changes in response to light above a predetermined optical power level, thereby changing the optical transmission properties of these power-limiting elements. | ||||||
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