230results about How to "Eliminate reflections" patented technology

The present invention provides matrixes doped with semiconductor nanocrystals. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. The present invention also provides processes for producing matrixes comprising semiconductor nanocrystals.

Matrixes doped with semiconductor nanocrystals are provided. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. Processes for producing matrixes comprising semiconductor nanocrystals are also provided. Nanostructures having high quantum efficiency, small size, and / or a narrow size distribution are also described, as are methods of producing indium phosphide nanostructures and core-shell nanostructures with Group II-VI shells.

Matrixes doped with semiconductor nanocrystals are provided. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes are optionally formed from the ligands. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. Processes for producing matrixes comprising semiconductor nanocrystals are also provided. Nanostructures having high quantum efficiency, small size, and / or a narrow size distribution are also described, as are methods of producing indium phosphide nanostructures and core-shell nanostructures with Group II-VI shells.

This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of he glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and / or antimony oxide.

An intraocular camera for retinal prostheses may include an optical imaging system comprising a set of optical elements for forming an image of the external world on an image sensor array, wherein the optical elements and the image sensor array may be enclosed in an implantable biocompatible housing that may employ haptic elements for stabilization within the eye. The set of optical elements may be designed to have a short focal length and to provide adequate resolution images that can be transformed into a set of stimulation signals applied to a pixellated microstimulator array. Transmission of the signals from the intraocular camera to a microstimulator driver circuit may be accomplished either by a wired or wireless communication device. Power and control signals may be provided to the intraocular camera by a wired or wireless communication device, or optically by means of ambient illumination or an optical beam.

This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of he glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and / or antimony oxide.

Matrixes doped with semiconductor nanocrystals are provided. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes are optionally formed from the ligands. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. Processes for producing matrixes comprising semiconductor nanocrystals are also provided. Nanostructures having high quantum efficiency, small size, and / or a narrow size distribution are also described, as are methods of producing indium phosphide nanostructures and core-shell nanostructures with Group II-VI shells.

A low-scatter polarization-preserving multilayer viewing screen. A substrate D, preferably a volume diffuser, for increasing the divergence of information-coded-light while preserving its polarization sense A as it passes therethrough has a discrimination of at least 2:1 within a viewing zone. An absorbing polarizer on one or both sides of D and aligned to pass polarization state A. In one embodiment, there is provided a polarization-state phase-shift layer for modifying the polarization state of forward-scatter and / or back-scatter that total internally reflects within the viewing screen into the state opposite of A. The phase-shift layer being located at any position between the polarizer and an outermost surface of the viewing screen through which said information-coded light passes.

Methods and apparatus for enhancing the performance of a reflective liquid crystal display system. The high-contrast color splitting prism system utilizes a "double-passed" prism assembly. Polarized light enters the prism assembly, is color-split and emitted as separate colors to spatial light modulators which reflect each color in accordance with a desired image. The reflective light is passed, once again, through the prism assembly where the separate colors converge and propagate to a projection lens for display of the image on a screen. A waveplate retarder is positioned between the liquid crystal display and the polarizing element. The waveplate retarder is tilted with respect to the optical axis to eliminate the deleterious effects of the Fresnel reflections at the interfaces of the waveplate retarder.

Methods and devices are disclosed for acquiring depth resolved aberration information using principles of low coherence interferometry and perform coherence gated wavefront sensing (CG-WFS). The wavefront aberrations is collected using spectral domain low coherence interferometry (SD-LCI) or time domain low coherence interferometry (TD-LCI) principles. When using SD-LCI, chromatic aberrations can also be evaluated. Methods and devices are disclosed in using a wavefront corrector to compensate for the aberration information provided by CG-WFS, in a combined imaging system, that can use one or more channels from the class of (i) optical coherence tomography (OCT), (ii) scanning laser ophthalmoscopy, (iii) microscopy, such as confocal or phase microscopy, (iv) multiphoton microscopy, such as harmonic generation and multiphoton absorption. In particular, a swept source (SS) is used that drives both an OCT channel and a coherence gated wavefront sensor, where:a) both channels operate according to SS-OCT principles;b) OCT channel integrates over at least one tuning scan of the swept source to provide a TD-OCT image of the object;c) CG-WFS integrates over at least one tuning scan of the swept source to provide an en-face TD-OCT mapping of the wavefront.For some implementations, simultaneous and dynamic aberration measurements / correction with the imaging process is achieved. The methods and devices for depth resolved aberrations disclosed, will find applications in wavefront sensing and adaptive optics imaging systems that are more tolerant to stray reflections from optical interfaces, such as reflections from the microscope objectives and cover slip in microscopy and when imaging the eye, the reflection from the cornea.

A portable computer support structure is constructed to include a base member, a support arm fastened pivotally with the base member, a back-stick plate pivoted to the base member and adapted to adjustably support the support arm above the base member in a standing position, a step-less pivoting device affixed to the top side of the support arm and holding a step-less shaft, and a support block fastened to the step-less shaft and adapted to support a portable computer for enabling the portable computer to be rotated with the step-less shaft relative to the support arm to adjust the view angle and to prevent the problem of reflection of light of the display screen.

The invention discloses a photoelectricity-navigation-based unmanned road recognition system which comprises a vision module, an image processing module, a road recognition module, a speed control module and a steering control module. Turning at a crossroad is mainly achieved through handling a road border, simulating a target trajectory at a track center and recognizing a turning sign. The multi-element PID steering control module and the speed control module realize constantly changing target trajectory when a vehicle rapidly tracks, and realize specified speed and the steering function through identifying color lumps marked by different colors. The intelligent optimized control system is different from a traditional tracking vehicle. The photoelectricity navigation vehicle can realize manless driving without peripheral support through identifying road borders (green belts, fences and the like) in reality and steering signs, thereby having a practical significance.

A display device, in particular digital display screen, with integrated photovoltaic cells, including (a) an array of image zones emitting light or backlit by a light source placed behind the array of image zones, (b) an array formed by a plurality of photovoltaic cells and a plurality of orifices, in which array two neighboring photovoltaic cells form an orifice, and (c) a lenticular array making it possible to focus the light emitted by the image zones into the orifice between two neighboring photovoltaic cells. The lenticular array of the display device is positioned between the array of image zones and the array of photovoltaic cells.

A stack of laminated removable transparent lenses which consists of two alternating optically clear materials in intimate contact. The materials are a plastic lens and a clear adhesive. The adhesive is uninterrupted. The lens and the adhesive have a refraction mismatch of less than 0.2. The lens stack can be used as a graffiti stop. The lenses are resistant to scratching.

An ophthalmic photographic apparatus comprises a photographic mask for defining a fundus photography range, a photographic stop for eliminating light reflected from an anterior portion of the eye, and a focusing lens for bringing the fundus into focus. Interlocking means are provided to move the photographic mask and the photographic stop in an interlocked manner relative to the movement of the focusing lens in such a way that with respect to a photographic optical system the photographic mask may be kept at a position substantially conjugate with an imaging plane of a CCD and the photographic stop may be kept at a position substantially conjugate with an anterior portion of the eye. The CCD is located at the image-side focal plane of the image-formation lens, the mask is located on the object-side focal plane of the focusing lens, and the photographic stop is located on the image-side focal plane of the focusing lens. These three components are moved as one unit when the system is adjusted to focus on the fundus.

An electromagnetic composite metamaterial including an electromagnetic medium and a plurality of spaced electromechanical resonators disposed in or on the electromagnetic medium configured to control electromagnetic wave propagation properties in the electromagnetic composite metamaterial.

An optical mouse has a light emitting diode (LED) and a projecting lens located on a reflection path of the LED so as to project the light of the LED to the sensor. After the sensor picks up the signal from the LED, the signal is readily sent to the computer so as to simplify the structure and reduce the manufacturing cost of the optical mouse.

A method for attaching imagers to color-separation prisms includes the steps of: arranging three solid-state array image sensor integrated circuits behind and in close proximity to the output faces of a color-separating prism having substantially equal optical path lengths for the three paths, the three solid-state array image sensor integrated circuits each having a solid-state array image sensor and bonding pads for electrical connections disposed on a top face thereof; aligning the three sensors such that the images traversing the three paths are coincident within a pixel dimension of the image sensors; filling the space between each output face of the prism and the top face of the corresponding image sensor with index-matched adhesive; and causing the index-matched adhesive to become rigid while maintaining the alignment of the three image sensors.

The invention relates to an echo elimination method and system based on a microphone array; the method uses wave beam formation, linearity echo elimination and non-linear echo elimination triple structures to inhibit echo energy in pickup signals, wherein a wave beam forming module can stably inhibit direct sound wave signals in a horn direction without being affected by environment changes; a linearity echo elimination module can inhibit residual echo after wave beam formation, thus eliminating echo reflection portion; a non-linearity echo elimination module uses a reference signal and residual echo signal long time amplitude correlation degree to carry out gain inhibition, thus further inhibiting echo energy. The method and system can greatly improve the echo inhabitation effect while ensuring the pickup signal to be clear and nature, thus having stronger performance and better stability when compared with the prior art.

The invention provides an array substrate. The array substrate comprises a base plate, a plurality of gate lines, a plurality of data lines and a plurality of pixel units defined by the gate lines and the data lines, wherein the pixel units comprise a first pixel unit; the first pixel unit comprises a first insulating layer, at least one common electrode and at least one pixel electrode, at least one first transparent connecting block and at least one touch metal wire; the first insulating layer comprises at least one first through hole; the common electrodes and the pixel electrodes are respectively arranged on two sides of the first insulating layer; the first transparent connecting blocks and the pixel electrode are arranged in the same layer, and each first transparent connecting block is connected with the common electrode through the first through holes; the touch metal wires and the pixel electrode are arranged in the same layer, and each touch metal wire is electrically connected with each first transparent connecting block. The invention also provides a touch display panel and a display device, including the array substrate. According to the array substrate, the touch display panel and the display device provided by the invention, reflection for backlight is eliminated, and the problem of diagram visibility caused by reflection backlight of touch electrode wires is solved.

A foreship arrangement for a vessel of the displacement type, which foreship consists of the part of the ship in front of the vessel's midship mark (2) and which vessel has a transversely symmetrical hull form about its centre line (CL) and a substantially conventional bow form below its design water line (Tdwl), characterised in that the stem line (1) of the vessel turns substantially backwards in relation to the length direction of the ship from a transition point (B) at or immediately above the design water line (Tdwl).

A portable computer support structure is constructed to include a base member, a support arm fastened pivotally with the base member, a back-stick plate pivoted to the base member and adapted to adjustably support the support arm above the base member in a standing position, a step-less pivoting device affixed to the top side of the support arm and holding a step-less shaft, and a support block fastened to the step-less shaft and adapted to support a portable computer for enabling the portable computer to be rotated with the step-less shaft relative to the support arm to adjust the view angle and to prevent the problem of reflection of light of the display screen.

A wiper controller includes: a sensor for detecting a waterdrop on a windshield; a wiper for wiping the windshield; and control means for controlling operation of the wiper. The control means monitors a waterdrop reflection when the sensor detects the waterdrop. The waterdrop reflection is a diffuse reflection of light. The control means operates the wiper with an intermittent wiping operation having a time interval in such a manner that the time interval in a case where the control means decides nonexistence of the waterdrop reflection is set to be longer than the time interval in a case where the control means decides existence of the waterdrop reflection.