| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | ISLANDS-IN-SEA TYPE PHOTOREFRACTIVE POLYMER COMPOSITE, AND PHOTOREFRACTIVE DEVICE AND OPTICAL DEVICE INCLUDING THE SAME | US14011077 | 2013-08-27 | US20140253997A1 | 2014-09-11 | Chil-sung CHOI; Kyoung-seok PYUN |
| Provided are an islands-in-sea type photorefractive polymer composite, and a photorefractive device and an optical device including the same. The islands-in-sea type photorefractive polymer composite includes at least a photoconductive polymer matrix, a nonlinear optical chromophore, and a plasticizer, as a sea component, and includes at least a photocharge generator as an island component. | ||||||
| 82 | NON-FOCAL OPTICAL POWER LIMITING POLYMERIC MATERIALS | US13256195 | 2010-03-12 | US20120002312A1 | 2012-01-05 | Abhijit Sarkar; Shamim Mirza; Salma Rahman; George Rayfield |
| This invention concerns a solid polymer matrix for use as non-focal optical power limiting polymeric materials. This matrix contains: (1) a hyperbranched polymer family, especially HB-PCS OR HB-PU, HB-PUSOX or PC; (2) one or more of RSA dye, MPA dye, azo dye or DMNPAA; 3) CNT and 4) a self-focusing component.This solid polymer matrix provides efficient protection from laser beam damage along with its self-focusing mechanism. | ||||||
| 83 | BROADBAND OPTICAL LIMITER BASED ON NANO-GRAPHENE AND METHOD OF FABRICATING SAME | US13176506 | 2011-07-05 | US20110304934A1 | 2011-12-15 | 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. | ||||||
| 84 | BROADBAND OPTICAL LIMITER BASED ON NANO-GRAPHENE AND METHOD OF FABRICATING SAME | US12766309 | 2010-04-23 | US20110170208A1 | 2011-07-14 | 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. | ||||||
| 85 | LIGHT EXCITED LIMITING WINDOW | US12856835 | 2010-08-16 | US20110051231A1 | 2011-03-03 | Ariela Donval; Boaz Nemet; Tali Fisher Masliah; Doron Nevo; Moshe Oron |
| An optical power limiter comprises an input optical transmission element, an output optical transmission element, and a power-limiting element disposed between the input and output elements for transmitting optical signals from the input element to the output element. The power-limiting element comprises 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 the power-limiting element. | ||||||
| 86 | Phase-Change Materials and Optical Limiting Devices Utilizing Phase-Change Materials | US12479311 | 2009-06-05 | US20100309539A1 | 2010-12-09 | 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. | ||||||
| 87 | GRATING LIKE OPTICAL LIMITER | US12525117 | 2008-01-31 | US20100166368A1 | 2010-07-01 | Ram Oron; Ariela Donval; Boaz Nemet; Doron Nevo; Moshe Oron |
| A reversible optical energy limiting device comprises a waveguide forming an optical path between an input end and an output end, and an optical energy responsive material located in the optical path for reflecting at least a portion of optical energy received from the input end back toward the input end when the optical energy exceeds a predetermined threshold. The optical energy responsive material does not reflect optical energy when it drops below the predetermined threshold, and thus propagation of optical energy from the input end to the output end is automatically resumed when the optical energy drops below the predetermined threshold. The optical energy responsive material may extend across the optical path an acute angle relative to the longitudinal axis of the optical path so that back-reflected light does not re-enter the optical system. | ||||||
| 88 | Full spectrum optical safeguard | US11135865 | 2005-05-23 | US07460247B1 | 2008-12-02 | Mark R. Ackerman |
| An optical safeguard device with two linear variable Fabry-Perot filters aligned relative to a light source with at least one of the filters having a nonlinear dielectric constant material such that, when a light source produces a sufficiently high intensity light, the light alters the characteristics of the nonlinear dielectric constant material to reduce the intensity of light impacting a connected optical sensor. The device can be incorporated into an imaging system on a moving platform, such as an aircraft or satellite. | ||||||
| 89 | Light control apparatus | US10579499 | 2004-11-17 | US20070086076A1 | 2007-04-19 | 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. | ||||||
| 90 | Plasmon-photon coupled optical devices | US11517780 | 2006-09-08 | US07206114B2 | 2007-04-17 | 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. | ||||||
| 91 | Far infrared tandem low energy optical power limiter device | US07566695 | 1990-07-31 | US07177516B1 | 2007-02-13 | Byong H. Ahn |
| Two embodiments of a multilayered low energy optical power limiter device are disclosed which protect thermal sensors against laser threats in the far infrared spectral region. One limiter device has multiple layers in order from the incoming radiation side an antireflective coating layer, a window substrate layer, a layer of chalcogenide, a germanium substrate layer, a layer of vanadium dioxide (VO2), a window substrate, and an antireflective coating layer. As incoming radiation energy increases, the VO2 layer will heat up and change from an unswitched transmissive state to a switched reflective state. The excessive energy past the switched state is reflected back through the germanium and chalcogenide layer and is absorbed quickly therein so that these layers also heat up quickly and are switched almost simultaneously with the VO2 layer to provide high optical density at a low switching threshold temperature with high damage threshold. The second embodiment further adds a second VO2 layer between the input antireflective coating layer and window substrate layers to reflect high radiation energy immediately. | ||||||
| 92 | Plasmon-photon coupled optical devices | US11517780 | 2006-09-08 | US20070008602A1 | 2007-01-11 | John Ballato; David Carroll; Jeffrey 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. | ||||||
| 93 | Optical energy switching device and method | US10507575 | 2003-03-13 | US07162114B2 | 2007-01-09 | Ariela Donval; Doron Nevo; Moshe Oron; Ram Oron |
| An optical power or energy-switching device, comprising an optical waveguide having an input section and an output section, the two sections forming a pair of opposed surfaces extending transversely through the axes of said waveguide sections, and a thin, substantially transparent layer of electrically conductive material disposed between said opposed surfaces, said layer of conductive material forming a plasma when exposed to optical signals propagating within said optical waveguide with an optical power level above a predetermined threshold, said plasma damaging said opposed surfaces sufficiently to render said surfaces substantially opaque to light propagating within said optical waveguide so as to prevent the transmission of such light. | ||||||
| 94 | Plasmon-photon coupled optical devices | US10865237 | 2004-06-10 | US20050275934A1 | 2005-12-15 | John Ballato; David Carroll; Jeffrey 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. | ||||||
| 95 | Arrangement and method for controlling the transmission of a light signal based on intensity of a received light signal | US09909175 | 2001-07-19 | US06970622B1 | 2005-11-29 | Kunal N. Taravade |
| An arrangement for controlling the transmission of a light signal is disclosed. The arrangement includes a first fiber optic line for transmitting the light signal and a light receiving unit operatively coupled to the first fiber optic line so that the light signal is received by the light receiving unit. The light receiving unit is operative to refract the light signal so that the light signal is substantially prevented from being transmitted through the light receiving unit if an intensity level of the light signal has a predetermined relationship with an intensity threshold level. | ||||||
| 96 | Optical switching device based on stable, non-absorbing optical hard limiters | US09933146 | 2001-08-20 | US06636337B2 | 2003-10-21 | 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. | ||||||
| 97 | Optical power limiting material | US10378571 | 2003-03-03 | US20030142397A1 | 2003-07-31 | 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. | ||||||
| 98 | Hybrid thermal-defocusing/nonlinear-scattering broadband optical limiter for the protection of eyes and sensors | US08430956 | 1995-04-28 | US06297918B1 | 2001-10-02 | Brian L. Justus; Alan L. Huston; Anthony J. Campillo |
| A passive optical limiter for protecting a light-sensitive object from damage due to an incident light beam above a first predetermined value of light intensity is disclosed. The passive optical limiter comprises: a first lens for focusing an incident light beam to a focal point; a protective element disposed near the focal point, the protective element being responsive to a focused incident light beam below the first predetermined intensity level for passing therethrough the focused incident light beam below the first predetermined intensity level, the protective element being responsive to a focused incident light beam between the first predetermined intensity level and a higher second predetermined intensity level for deflecting substantially all of the focused incident light beam into rings of light and passing therethrough only a small portion of the converged incident light beam between the first and second predetermined intensity levels, and the protective element including a scattering element responsive to incident light at or above the second predetermined intensity level for scattering that incident light in all directions to decrease the intensity level of the incident light below a damage threshold of the light sensitive object; and a second lens for focusing substantially all of the light passing through the the protective element and the second lens onto the light-sensitive object. | ||||||
| 99 | Optical radiation limiter | US751836 | 1976-12-17 | US4093353A | 1978-06-06 | Kenneth T. Lang |
| An optical limiter includes two bandpass filters whose narrow passbands are at least partially overlapping at low light levels. One of the two filters is well heat-sunk while the other is not. When the input light level exceeds a threshold level, heating causes the passband of the thermally isolated filter to shift relative to the passband of the heat-sunk filter. High level light self-limits or attenuates itself by virtue of the filter passband mismatch that occurs. | ||||||
| 100 | Optical limiter, optical logic circuit, comparator, digital converter, optical transmission apparatus and optical processing method | EP14196515.2 | 2014-12-05 | EP2919063B1 | 2018-03-07 | Izumi, Futoshi |
| 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. | ||||||
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