39results about How to "High transfer function" patented technology

A remotely accessible power controller communicates power reduction command signals by power line carrier (PLC) signaling over existing AC power distribution conductors for automatically disconnecting building lighting loads. Turn-off command signals from a local or remote controller automatically disconnect building lighting loads according to a time-of-day schedule to comply with mandated energy consumption codes applicable to the automatic shutoff of electrical lighting. Load shedding (selective turn off and / or dimming) command signals transmitted from public or private utility companies automatically disconnect or reduce building lighting loads in accordance with load curtailment agreements to limit total connected power consumption below an agreed level. The power controller is connected by a minimum amount of retrofit wiring into an existing end-user alternating current power distribution network, for example, a building power distribution network having AC power conductors that service multiple lighting loads interconnected in one or more power phase groups. Each dimming lighting load is equipped with an addressable dimming module for decoding and executing dimming and turn-on and turn-off power reduction commands. Fluorescent lamps are equipped with addressable electronic dimming ballasts.

A data receiver having a transfer function that exhibits peaking at high frequencies is provided to compensate an input signal provided on a transmission channel having a low pass transfer function. The data receiver includes first and second differential input terminals, which receive the differential input signal from the transmission channel. The first differential input terminal is coupled to the source of a first common gate transistor in a first self-biased common gate amplifier. The second differential input terminal is coupled to the source of a second common gate transistor in a second self-biased common gate amplifier. A differential output signal is provided from the drain terminals of the first and second common gate transistors. The first and second differential input terminals are not directly connected to any transistor gates in the data receiver, thereby enabling these differential input terminals to be safely connected directly to the transmission channel.

Powerline networks are inherently noisy and subject to power surges, spikes, and other events. Devices exist to combat these issues and protect electrical appliances that are connected downstream from the power sources for theses devices, but these devices usually also severely limit data communication that may also be desired on this network. This invention provides an intelligent, self-aware powerline conditioning and communication node that allows for, or even improves, data communication on the network, and still provides for noise reduction, line filtering, and surge protection for downstream electrical appliances.

An optical system (302) has a plurality of optical surfaces (304, 305, 306, 307, 308, 309) configured to provide blurred images of objects located within a selected range of object distances. At least two of the plurality of optical surfaces are configured to contribute to the blurring. An imaging system (300) includes a blurring optical system (302), a sensor (310) which receives light directed through the optical system, and an image processor (320) which selects one or more deblurring functions and applies the deblurring functions to provide a processed image. The processor may apply different deblurring functions to different sets of the raw data representing different portions of the field of view.

Powerline networks are inherently noisy and subject to power surges, spikes, and other events. Devices exist to combat these issues and protect electrical appliances that are connected downstream from the power sources for theses devices, but these devices usually also severely limit data communication that may also be desired on this network. This invention provides an intelligent, self-aware powerline conditioning and communication node that allows for, or even improves, data communication on the network, and still provides for noise reduction, line filtering, and surge protection for downstream electrical appliances.

A simple and robust variable coaxial capacitive sensor and detection method for monitoring the position of a rapidly reciprocating member such as a piston or displacer in a free piston Stirling engine. The coaxial capacitor of the present invention in a preferred embodiment thereof is configured to modulate capacitive electrode area rather than inter-electrode spacing and as a result a highly linear transfer function can be achieved. Also disclosed are detection methods which derive and process signals in connection with applications which have small sensor capacitance variations while suppressing stray capacitance error.

A novel CMOS image unit pixel layout having a photodiode including an optically optimized square image sensing region. The square image sensing layout provides for reduced electrical and color crosstalk and improved modulation transfer function (MTF) between neighboring pixels of an array of pixels.

A method for adjusting or aligning one or more optical elements in a Transmission Electron Microscope (TEM) is disclosed. The TEM is equipped with an objective lens for guiding a beam of electrons to a sample, a diffraction plane in which at least a beam of unscattered electrons is focused and a structure to enhance the Contrast Transfer Function (CTF) which is situated in the diffraction plane or an image thereof.

The border of object in an image is blurred and so the modulation transfer function (MTF) of an image is reduced due to the blurred border. This present invention provides a deductive method for determining a border of an object in an image. Then the border of the object therein is amended and so the MTF of image is increased. In regard to an increasingly changeable color image, the present invention provides a deductive method in deciding upon a gray scale of the image to increase the color accuracy in amending an image.

The invention relates to a sabot (4) for a sub-caliber projectile (1) having a projectile core (2). When the projectile exits a weapon barrel, the sabot detaches from the projectile core (2) without transferring momentum by means of a separating aid (4) incorporated between the projectile core (2) and the sabot. The separating aid (4) has a plurality of fingers (5) having at least one predetermined breaking point (8a, 8b), which is connected to the projectile core (2) by a type of snap-connection bead (6) on the fingers / braces (5).

A system and method for performing optical navigation uses an imaging lens, which is positioned between a target surface and an image sensor array, that is orientated to be substantially horizontal with respect to the target surface such that the optical axis of the imaging lens is substantially perpendicular to the target surface.

A system and method for performing optical navigation uses an imaging lens, which is positioned between a target surface and an image sensor array, that is orientated to be substantially horizontal with respect to the target surface such that the optical axis of the imaging lens is substantially perpendicular to the target surface.

The invention discloses a multi-focus multi-field coverage unscreened total reflection stigmatic optical system which is characterized in that: the invention comprises two lens groups; a first lens group comprises a main reflector and an auxiliary reflector; the second lens group comprises two or a plurality of third reflectors; any one of the third reflectors in the second lens group and the first lens group form a three-mirror reflective stigmatic optical system. Because curvatures and positions, the curvatures and aspherical higher order terms, or the curvatures, the positions and the aspherical higher order terms of the plurality of third reflectors in the second lens group are all different, the multi-focus multi-field coverage optical system is realized.

The invention relates to a sabot (4) for a sub-caliber projectile (1) having a projectile core (2). When the projectile exits a weapon barrel, the sabot detaches from the projectile core (2) without transferring momentum by means of a separating aid (4) incorporated between the projectile core (2) and the sabot. The separating aid (4) has a plurality of fingers (5) having at least one predetermined breaking point (8a, 8b), which is connected to the projectile core (2) by a type of snap-connection bead (6) on the fingers / braces (5).

An ear-canal earpiece having an electroacoustic sound transducer, a sound guide unit having a first and a second end for guiding the sound from the electroacoustic sound transducer to an ear of a user and at least one portion. The ear canal earpiece has a canal having a first end open towards the ear canal and a second outwardly open end. A diaphragm is provided in the canal and extends over the entire cross-section of the canal.

An all-reflective or reflective and cata-dioptric optical system is described including a concave primary mirror having a central aperture and a radius, the primary mirror having one of a parabolic, non-parabolic conical, or aspherical surface, a convex secondary mirror facing the primary mirror, the secondary mirror having an aspherical surface, where an optical axis extends from a vertex of the primary mirror to a vertex of the secondary mirror, a concave tertiary mirror arranged behind the primary mirror, the tertiary mirror having one of a parabolic, non-parabolic conical or aspherical surface, a concave quaternary mirror arranged in the central aperture of the primary mirror or behind the primary mirror, the quaternary mirror having one of a spherical, parabolic, non-parabolic conical or aspherical surface, and / or at least one image plane having one or more aggregated sensors. Additional multispectral imaging may utilize beam splitter(s), folding mirror(s), focal length optimizer(s) and / or additional image planes.

A cata-dioptric optical system for high resolution imaging in visible and infrared bands. The system includes a concave primary mirror, a convex secondary mirror, at least one beam splitter, a first folding mirror, a first group of lenses, a second group of lenses, and at least two image planes. The image planes have one or more aggregated sensors, where a first image plane receives rays from the first group of lenses and a second image plane receives rays from the second group of lenses, and at least one image plane is positioned behind the primary mirror and at a radial distance from the optical axis that is no more than the radius of the primary mirror.

The invention relates to a high-resolution large-fov (field of view) zoom projection lens. An optical system lens group comprises a front compensation lens group, a variable-magnification lens group, a rear compensation lens group and a rear fixed lens group which are arrayed in sequence along the optical axis from a screen to an image plane DMD (digital micro-mirror device) chip; the variable-magnification lens group is the positive focal-length group component; the front compensation lens group and the rear compensation lens group are the negative focal-length group components; the rear fixed lens group is the positive focal-length group component; the front compensation lens group comprises three lenses; the variable-magnification lens group comprises two lenses; the rear compensation lens group comprises two lenses; the rear fixed lens group comprises six lenses; and the rear fixed lens group is provided with a diaphragm. The focal power of each lens group is distributed reasonably, and the high-resolution large-fov zoom projection lens has a compact structure, a large fov, a high resolution and a good image forming effect, can achieve a significant effect when being used for projecting images on a 2-4k DMD chip based large screen, adopts the materials being easy to process and is suitable for bath production.

A method for adjusting or aligning one or more optical elements in a Transmission Electron Microscope (TEM) is disclosed. The TEM is equipped with an objective lens for guiding a beam of electrons to a sample, a diffraction plane in which at least a beam of unscattered electrons is focused and a structure to enhance the Contrast Transfer Function (CTF) which is situated in the diffraction plane or an image thereof.

An all-reflective optical system is described including a concave primary mirror having a central aperture and a radius, the primary mirror having one of a parabolic, non-parabolic conical, or aspherical surface, a convex secondary mirror facing the primary mirror, the secondary mirror having an aspherical surface, where an optical axis extends from a vertex of the primary mirror to a vertex of the secondary mirror, a concave tertiary mirror arranged behind the primary mirror, the tertiary mirror having one of a parabolic, non-parabolic conical or aspherical surface, a concave quaternary mirror arranged in the central aperture of the primary mirror or behind the primary mirror, the quaternary mirror having one of a spherical, parabolic, non-parabolic conical or aspherical surface, and at least one image plane having one or more aggregated sensors, wherein the image plane is positioned at a radial distance from the optical axis that is no more than the radius of the primary mirror.

The invention belongs to the field of optical imaging, and relates to a compact large-view-field small F # catadioptric optical system. The method is mainly used for large-view-field high-resolution earth imaging. The problem that an existing remote sensing optical system cannot meet the requirements for a large imaging view field, a wide working band and a compact structure at the same time is solved. The system sequentially comprises a primary mirror, a secondary mirror, a third mirror, a fourth mirror and a compensation lens in the light propagation direction. Inner holes are formed in theaxial centers of the primary mirror, the secondary mirror and the third mirror; the third mirror is embedded into the inner hole of the primary mirror; the fourth lens is embedded into an inner hole of the secondary lens; light is reflected by the primary mirror, the secondary mirror, the third mirror and the fourth mirror in sequence in the propagation direction and then penetrates through the compensation lens to reach a focal plane for imaging. The primary mirror, the secondary mirror, the third mirror and the fourth mirror are all even-order aspheric mirrors with the highest number of times being four; the four even-order aspheric reflectors are adopted to turn back a light path, and the total length of the system is greatly reduced; the primary mirror, the third mirror, the secondarymirror and the fourth mirror are integrally machined; the total number of lenses of the system is reduced, and system adjustment difficulty is lowered.

A data transfer circuit that transfers a first kind of data stored in an external memory circuit includes: an internal memory circuit that is capable of, by an external circuit, writing and / or rewriting a second kind of data including information for one region as a transfer source in the external memory circuit and another region as a transfer destination in the external memory circuit; a transfer circuit that transfer the first kind of data; and a control circuit that makes the transfer circuit transfer the first kind of data stored in the one region to the other region based on the second kind of data.

The invention provides a two-dimensional large-field-of-view imaging plane symmetric free-form surface optical system, and relates to the technical field of optics, a first reflector, a second reflector, a third reflector, a fourth reflector and a detector image plane are sequentially arranged in the light path direction, an aperture diaphragm is further arranged, and the position of the aperture diaphragm coincides with the position of the second reflector; the light enters the first reflector, enters the second reflector after being reflected by the first reflector, enters the third reflector after being reflected by the second reflector, enters the fourth reflector after being reflected by the third reflector, and enters the detector image surface for imaging after being reflected by the fourth reflector. The optical system adopts four free-form surface reflectors with symmetrical planes, the four free-form surface reflectors are arranged according to the negative-positive-positive-positive-positive distribution mode of focal power, the inclination angle of the reflectors meets the requirement of anastigmatism, near-diffraction-limit imaging in a 18-degree * 9-degree two-dimensional view field is achieved, distortion correction can be achieved in the infrared band of 3-5 microns through system design, and the resolution ratio of the system is greatly improved. The imaging quality is close to the diffraction limit.

Touchscreen mirror device (100) comprising a touchscreen panel (10) and a mirror surface (20). The touchscreen panel (10) comprises a grid of capacitive sensors (12) for detecting a position of an input object such as a fingertip (F) near the touchscreen panel (10). The mirror surface (20) is configured to at least partially reflect a mirror image (M) at a front side of the mirror surface (20). The mirror surface (20) comprises a reflective metal layer (21) divided in separate metal islands (21a,21b) that are electrically isolated from each other by a single contiguous gap (G) for allowing the capacitive sensor (12) to detect a position of the input object through the mirror surface (20).

An all-reflective optical system is described including a concave primary mirror having a central aperture and a radius, the primary mirror having one of a parabolic, non-parabolic conical, or aspherical surface, a convex secondary mirror facing the primary mirror, the secondary mirror having an aspherical surface, where an optical axis extends from a vertex of the primary mirror to a vertex of the secondary mirror, a concave tertiary mirror arranged behind the primary mirror, the tertiary mirror having one of a parabolic, non-parabolic conical or aspherical surface, a concave quaternary mirror arranged in the central aperture of the primary mirror or behind the primary mirror, the quaternary mirror having one of a spherical, parabolic, non-parabolic conical or aspherical surface, and at least one image plane having one or more aggregated sensors, wherein the image plane is positioned at a radial distance from the optical axis that is no more than the radius of the primary mirror.

A system is provided to improve retinal camera picture quality by providing a user-variable transfer function for each pixel that results in redistributing grayscale values to solve the problem of saturation caused by highly reflective retinal objects. The result is the ability to capture both optic nerve and retina detail in a single picture. The darker retina is brightened to permit observing retinal detail using the redistributed grayscale values, while preserving optic nerve detail. Those pixels experiencing high-intensity reflections are properly exposed to prevent saturation, while outputs of low-intensity pixels associated with the darker regions are intensified, in one embodiment in accordance with an adjustable Bezier curve. The result is that one can obtain retinal details previously flooded out by the reflections from the optic nerve while at the same time offering optic nerve detail. In one embodiment the redistributed grayscale values are optimized for each color plane to provide color-corrected images matching those associated with film cameras.

The present invention discloses a micro type integrated narrow-band filter array and its preparation method. Said filter array includes the following several portions: a substrate, on one side surface of said substrate several channel micro type narrow-band light-filtering film layers are firmly combined, on its another side surface a common section subpeak film layer is coated. It is characterized by that between every two channel micro type narrow-band light-filtering film layers a space layer is set, in the space layer interior a light-proof metal layer capable of preventing light crosstalk is set. Besides, said invention also provides the concrete steps of its preparation method.

The invention provides a visible light-medium wave infrared afocal optical system. The visible light-medium wave infrared afocal optical system comprises a reflection type objective lens group and a transmission type eyepiece group, the reflective objective lens group comprises a first reflector and a second reflector; the transmission type eyepiece group comprises a field lens group and a collimating lens group; the first reflector is provided with a center hole. The second reflecting mirror is arranged in front of the first reflecting mirror and forms a Cassegrain structure with the first reflecting mirror; the field lens group is placed in the center of the first reflector, and the collimating lens group is placed behind the field lens group; the field lens group and the collimating lens group are composed of lenses. The light beam enters the field lens group after being reflected twice by the first reflector and the second reflector, and the field lens group is used for reducing the range of the light beam, so that the light beam with the reduced range enters the collimating lens group and is emitted in parallel after being refracted by the collimating lens group. According to the invention, large-aperture, multi-band and common-aperture imaging is realized, the structure is compact, and the adaptability is good; the method has the advantages of good imaging quality, high transfer function, small distortion and the like.

A stagger sensor and a method for improving modulation transfer function. The method of using the stagger sensor for improving modulation transfer function can be applied to scan an object. The stagger sensor includes a plurality of sensing modules. The method of increasing scanning resolution includes retrieving reference digital data and processing digital data of a computed pixel obtained from an object scanning operation.