45results about How to "Reduce and eliminate distortion" patented technology

A system and method of free-space optical satellite communications includes a ground station and transceiver for transmitting and receiving an optical communications signal. Adaptive optics at the ground station are operative with the transceiver for determining the shape of any distortions in the wavefront of the optical communications signal and compensating at the ground station for the distortions. A satellite includes a transceiver for transmitting and receiving the optical communications signal and includes adaptive optics for determining the shape of any distortions in the waveform of the optical communications signal and compensating at the satellite for the distortions.

Methods and apparatus are disclosed for DC offset estimation and for DC offset compensation that collectively reduce or eliminate the distortion of subcarriers due to DC offset in an OFDM receiver. The DC offset estimation is obtained by subtracting a sum of time domain samples of an OFDM symbol for two consecutive OFDM symbols or subtracting a known transmitted OFDM symbol and a frequency domain representation of a received version of the known OFDM symbol (at least one of which is adjusted to compensate for channel distortion). The DC offset compensation is accomplished by removing the estimated DC offset from the received signal. The DC estimation process and the DC compensation process can be connected in disclosed feed-forward or feedback configurations.

An image signal converting apparatus for converting a first image signal into a second image signal, where the first and second image signals include a plurality of pictures of different frames. A motion detector is operable to detect motion of the first image signal between a first frame and a second frame, and processing circuitry produces the second image signal based on an assumption of a pixel at a position corresponding to the detected motion. The apparatus may be employed to produce an output signal of either the same resolution as the first image signal with aliasing distortion reduced or eliminated, or with higher resolution in vertical and / or horizontal directions.

A remote device in accordance with the present invention includes an adaptive power receiver that receives wireless power from the wireless power supply by induction. The adaptive power receiver may be switched among two or more modes of operation, including, for example, a high-Q mode and a low-Q mode. By controlling the duty cycle of the switching between modes, the amount of energy received by the adaptive receiver may be controlled to communicate to the wireless power supply. This control is a form of adaptive resonance communication or Q control communication. Distortion can be reduced or eliminated by ramping between duty cycles with adjustment to intermediate duty cycle values.

A method and apparatus for making chip assemblies is disclosed that prevent or reduce the cracking and delamination of ultra low-k dielectrics in the back-end-of-line in Si chips that can occur during the chip assembly process. The method and apparatus apply pressure to the top and bottom surfaces of a substrate during the chip bonding process so that the bending and warping of the assembled modules are reduced. The reduced bending and warping prevent or reduce the cracking and delamination of ultra low-k dielectrics.

A linearity corrector is provided that reduces distortion in a signal processing system, such as an ADC. The linearity corrector provides a first order signal path having distortion components connected to an adder, and a filter product circuit that is also connected to the adder. A method is provided for reducing distortion by calculating a filter product and adding the filter product to a first order signal having a relative delay such that the filter product reduces, or eliminates, the order of distortions corresponding to the order of the filter product.

A dual pane lens assembly is provided which is adapted to be installed into a frame of a goggle. The dual pane lens assembly may include an outer lens, an inner lens positioned proximate the outer lens, and a gasket disposed between the outer and inner lens which adheres the inner lens to the outer lens, while further forming an air tight semi-annular space between the outer and inner lenses to mitigate against fogging. Dry dehumidified air may be disposed in the semi annular space to further mitigate against fogging. Also, the space between the lenses may be pressurized to a pressure between the atmospheric pressure of the goggle's expected use altitude and the atmospheric pressure of the goggle's assembly altitude such that distortion is minimized when the goggle is worn at the goggle's expected use altitude.

Embodiments of the present invention provide a method and device for processing network time delay characteristics. The method includes: determining whether network time delay changes; if the network time delay reduces, determining whether at least one blank frame is included in received but not played media frames of a real-time media service; if at least one blank frame is included in the received but not played media frames, extracting the blank frame from the received but not played media frames, the blank frame is a media frame, information amount of which is smaller than a preset first threshold, or difference between the information amount of which and the information amount of a previous media frame is smaller than a preset second threshold; if the network time delay increases, inserting the blank frame in the received but not played media frames. According to the embodiments of the present invention, when the network time delay changes, time for playing the received media frames may be adjusted by changing number of blank frames in the received but not played media frames, so as to reduce or eliminate the effect on the real-time media service generated by the network time delay characteristics.

The present invention is related to spacers that can create fluid flow space at a variety of structural interfaces, particularly in building construction. The spacers of the present invention include unique hinges that can physically couple one panel of the spacer to another panel of the spacer in a manner that substantially distortionally separates the two panels. Preferred embodiments include a folded hinge having at least two folds. The spacers of the present invention also include unique panel dimples that help control the rigidity of the panel. In preferred embodiments, elongated dimples are used to help control rigidity.

Railway cars are provided with sidewalls having an optimum number of support posts formed from a first material such as, but not limited to, steel and an optimum number of support posts formed from a second material such as, but not limited to, aluminum to optimize empty car weight and service of life of each railway car. Endwall assemblies, roof assemblies, floor assemblies and other components associated with a railway car may be fabricated from different types of material and an optimum number of supporting structures to reduce manufacturing cost, reduce repair costs, increase service life and increase load carrying capacity. Self piercing rivets may be used to attach two or more layers of material, particularly two or more layers of dissimilar materials. The use of self piercing rivets may also reduce manufacturing and repair costs, increase service life and load carrying capacity of a railway car.

A biaxially oriented polyolefin multilayer film having a skin layer having oil-absorbing porous particles is disclosed. The film has substantially a small amount of porous particles on a weight basis of the total weight of the film and yet shows substantially no visible distortion after exposure to food products such as potato chips.

A camera mount, comprising a camera mounting portion, wherein a camera can be removably coupled to the camera mounting portion, such that a photographic plane of the camera is parallel to a photographic plane of the camera mounting portion; a rail portion, wherein the rail portion extends from the camera mounting portion substantially perpendicular to the photographic plane of the camera mounting portion; and a frame, wherein the frame is adapted to receive one or more reference scales such that a photographic plane of the one or more reference scales is parallel to a photographic plane of the camera mounting portion, and wherein the frame is coupled to the rail portion such that a photographic plane of the frame is parallel to a photographic plane of the camera mounting portion elements.

An optical system of a stereo video endoscope with lateral viewing direction. The optical system including: a sideways looking distal optical assembly; and a proximal optical assembly. Where the distal optical assembly includes, successively in a direction of light incidence on a common optical axis: an entrance lens configured as a raised negative meniscus, an optical deflection unit; and an exit lens configured as a hollow positive meniscus, Where the distal optical assembly has, at least in sections, a right and a left lens system channel of identical type and arranged parallel to one another, each of the right and left lens system channel having: a dedicated optical axis, and at least one first lens and an achromatic lens group in the direction of light incidence.

A method and apparatus for maintaining a purged optical gap between a pellicle and a reticle in a photolithography system. A frame between a reticle and a pellicle maintains the purged optical gap. The frame defines first and second opposing surfaces. The first opposing surface defines a first opening, and is configured to mate with the pellicle. The second opposing surface defines a second opening, and is configured to mate with the reticle to enclose the optical gap between the pellicle and the reticle. At least one edge of the frame has an opening therethrough. A porous sintered material fills each opening through an edge of the frame.

A reflective reticle substantially reduces or eliminates pattern distortion that results from the absorption of EUV radiation while maintaining a reticle thickness consistent with industry standards. The reflective reticle includes a layer of ultra-low expansion (ULE) glass and a substrate of Cordierite having a thermal conductivity substantially larger than that of ULE glass. An aluminum layer is disposed onto a first surface of the ULE glass and a second surface of the ULE glass is polished to be substantially flat and defect-free. The Cordierite substrate can be directly bonded to the aluminum layer using anodic bonding to form the reflective reticle. Alternatively, a first surface of an intermediate Zerodur layer can be bonded to the aluminum layer, and a second aluminum layer can be used to anodically bond the Cordierite substrate to a second surface of the Zerodur layer, thereby forming the reflective reticle.

A method and apparatus for maintaining an optical gap between optical structures in a photolithography system is described. A frame defines first and second opposing surfaces. The first opposing surface defines a first opening and the second opposing surface defines a second opening. A plurality of spacing members are spaced apart on the first opposing surface around the first opening. The spacing members have substantially co-planar surfaces configured to mate with a surface of a first optical structure. A bonding agent seals a space around the first opening between the first opposing surface and the first optical structure. The frame thereby encloses the optical gap between the first optical structure and a second optical structure.

A camera mount, comprising a camera mounting portion, wherein a camera can be removably coupled to the camera mounting portion, such that a photographic plane of the camera is parallel to a photographic plane of the camera mounting portion; a rail portion, wherein the rail portion extends from the camera mounting portion substantially perpendicular to the photographic plane of the camera mounting portion; and a frame, wherein the frame is adapted to receive one or more reference scales such that a photographic plane of the one or more reference scales is parallel to a photographic plane of the camera mounting portion, and wherein the frame is coupled to the rail portion such that a photographic plane of the frame is parallel to a photographic plane of the camera mounting portion elements.

A method for reducing the fractional spurious in a fractional N-PLL oscillator comprising a phase comparator having nonlinear elements and a variable frequency oscillator that responds to the low frequency component of output signals of the phase comparator and with which reference signals and signals obtained by dividing the output signals of the variable frequency oscillator are input to the phase comparator, wherein the oscillation frequency component of the variable frequency oscillator is eliminated from the signals input to the phase comparator and the fractional spurious is thereby reduced. The oscillation frequency component of the variable frequency oscillator is eliminated using a gate in the drawings.

A method of sintering a metal injection-moulded, green aerofoil component. The method includes providing a setter having a stationary support arranged to support an aerofoil part of the component and a moveable platform arranged to support an end part of the component, the moveable platform being independently moveable relative to the stationary support. The method further includes locating the green component on the setter such that the aerofoil part and the end part are supported by respectively the stationary support and the moveable platform. The supported green component is then sintered, the moveable platform moving during the sintering relative to the stationary support to accommodate sintering-induced shrinkage of the component.