432results about How to "Reduce overall chromatic aberration" patented technology

A display unit for binocular representation of a multicolor image including a control unit triggering an imaging element such that the imaging element generates in a temporal successive manner the image to be displayed for a first beam path and a second beam path as a first image and second image, respectively. The images are generated in a pre-distorted manner, opposite of the chromatic aberration of the respective beam path, such that the chromatic aberration generated in the respective beam path is compensated when the first and second image is displayed. The display unit includes a switching module which operates in temporal synchrony with the first and second image being generated, such that a user can see the first image only via the first beam path and the second image only via the second beam path.

The present invention involves the prescribing and / or dispensing ophthalmic lenses, such as progressive addition lenses, for a wearer. In one form of the invention lens usage information is obtained from a wearer and entered into a programmed computer. The programmed computer processes the lens usage information to provide a separate weighted lifestyle score for each of one or more respective lifestyle score categories, such that each weighted lifestyle score is a function of a predetermined relationship between the respective lifestyle score category and at least ophthalmic lens design feature. The programmed computer then selects or designs an ophthalmic lens design using one or more of the weighted lifestyle scores such that the selected or designed ophthalmic lens has at least one lens design feature which has been customised using one or more of the weighted lifestyle scores.

The invention provides a zoom lens system that is reduced in terms of both size and cost. The zoom lens system comprises a first positive lens group G1, a second negative lens group G2, a stop S, a third positive lens group G3 and a fourth positive lens group G4. During zooming from a wide-angle end to a telephoto end of the system, while the first lens group G1 remains fixed, the second lens group G2 moves from an object side to an image plane side of the system, the third lens group G3 moves from the image plane side to the object side, and the fourth lens group G4 moves to keep an image plane at a constant position. The first lens group G1 is made up of a negative meniscus lens convex on an object side and a double-convex lens, the second lens group G2 is made up of a double-concave lens and a positive meniscus lens convex on an object side thereof, with an aspherical surface being used for a surface of the positive meniscus lens that is located on an image side thereof, the third lens group G3 is made up of a double-convex lens and a negative meniscus lens convex on an object side thereof, with an aspherical surface being used for a surface of the double-convex lens that is located on an object side thereof, and the fourth lens group G4 is made up of one double-convex lens.

An electron beam inspection system of the image projection type includes a primary electron optical system for shaping an electron beam emitted from an electron gun into a rectangular configuration and applying the shaped electron beam to a sample surface to be inspected. A secondary electron optical system converges secondary electrons emitted from the sample. A detector converts the converged secondary electrons into an optical image through a fluorescent screen and focuses the image to a line sensor. A controller controls the charge transfer time of the line sensor at which the picked-up line image is transferred between each pair of adjacent pixel rows provided in the line sensor in association with the moving speed of a stage for moving the sample.

An object of the invention is to provide a solar battery module having a high efficiency power generating ability, a harmony of design without an odd sensation, and a freedom of design. The object is achieved by a solar battery module comprising, on a light-receiving surface thereof, a photoelectric conversion section for converting incident light into electricity, the photoelectric conversion section comprising silicon, and an insulating color film disposed in regions other than the photoelectric conversion section for reducing a color difference from the photoelectric conversion section.

A particle-beam exposure apparatus (1) for irradiating a target (41) by means of a beam (2) of energetic electrically charged particles comprises: an illumination system (101) for generating and forming said particles into a directed beam (21); a pattern definition means (102) located after the illumination system for positioning a pattern of apertures transparent to the particles in the path of the directed beam, thus forming a patterned beam (22) emerging from the pattern definition means through the apertures; and a projection system (103) positioned after the pattern definition means (102) for projecting the patterned beam (22) onto a target (41) positioned after the projection system. The apparatus further comprises an acceleration / deceleration means (32) containing an electric potential gradient which is oriented substantially parallel to the path of the structured beam and constant over at least a cross-section of the beam.

A vehicle light can include a light emitting diode (LED) serving as a light source and an optical system for controlling a light distribution pattern of the light beams from the LED light source utilizing a light guide (such as a lens body having an inner reflecting surface). The vehicle light can project illumination light with a low beam light distribution pattern. The vehicle light can include an LED light source and a lens body serving as a light guide. The lens body can include a light incident surface, a reflecting surface, and a light exiting surface. The LED light source can have a rearmost end light emitting point from which light beams are emitted to form a bright-dark boundary line. Among the light beams, perpendicularly incident light beams not subjected to refraction can be projected toward the bright-dark boundary line while obliquely incident light beams that are subjected to refraction can be corrected to be directed in a lower angular direction than the bright-dark boundary line and to be mixed with the other light beams, thereby preventing color shading of illumination light from the vehicle light.

According to the present invention, it is possible, by using the first and second light source loci, to tone down the influence of the object color of the color information in the image and detect the light source based on the color information having the influence of the object color toned down so as to detect the light source accurately. It is thereby possible to reduce the color failure when controlling the white balance.

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a third lens having a positive power; and a fourth lens having a convex surface on the object side near a paraxial axis and having a meniscus shape. The imaging lens satisfies conditional expressions specified in the specification.

A lens includes a diffractive surface having an etched structure and a refractive surface having a curved structure. The lens reduces chromatic aberration of incident light and extends depth of focus. In one alternative, the etched structure is a calculated phase pattern or a pattern that is embossed or diamond tuned. In another alternative, the curved structure is convex shaped or concave shaped. In yet another alternative, the lens is an imaging lens wherein high lateral resolution of incident light is preserved.

Methods and apparatus for capturing or generating images using multiple optical chains operating in parallel are described. Pixel values captured by individual optical chains corresponding to the same scene area are combined to provide an image with at least some of the benefits which would have been provided by capturing an image of the scene using a larger lens than that of the individual lenses of the optical chain modules. By using multiple optical chains in parallel at least some benefits normally obtained from using a large lens can be obtained without the need for a large lens. Furthermore in at least some embodiments, a wide dynamic range can be supported through the use of multiple sensors with the overall supported dynamic range being potentially larger than that of the individual sensors. Some lens and / or optical chain configurations are designed for use in small handheld devices, e.g., cell phones.

An imaging lens includes a first lens having a negative power and including a concave surface facing an image side, a second lens having a positive power, a third lens having a positive power, an aperture diaphragm, a fourth lens, which is a biconvex lens having a negative power, a fifth lens having a positive power and including a convex surface facing the image side, and a sixth lens having a positive power and including a convex surface facing an object side, which are arranged in this order from the object side. The Abbe number of a material forming the fourth lens with respect to the d-line is 30 or less. When the focal length of the entire lens system is f and a composite focal length from the fourth lens to the sixth lens is f456, the imaging lens satisfies following conditional expression:1.00<f456 / f<1.88.

A circuit and method for processing an image to correct the pixel value of a sub-pixel included in color data to reduce color differences. The image processing circuit includes a plurality of defect determination circuits respectively corresponding to a plurality of sub-pixels (colors). Each defect determination circuit determines whether or not the corresponding sub-pixel, or first sub-pixel, includes a defect and generates a determination signal. The defect determination circuits provide each of a plurality of correction circuits respectively corresponding to a plurality of sub-pixels (colors) with the determination signals. Each correction circuit generates a corrected value for the corresponding first sub-pixel when at least one of the determination signal is indicative of a defect.

It is an object of the present invention to provide a recording ink which contains at least a pigment, a dispersant, a water-soluble solvent, a wetting agent and water, wherein the pigment contains at least one of diketopyrrolopyrrole red pigment and phthalocyanine green pigment in order to obtain a recording ink and ink set which excel in discharge stability with no head clogging during printing and can obtain high quality images with good color tone on the regular paper as well as on an exclusive recording paper; and ink cartridge, ink record, inkjet recording apparatus and inkjet recording method which utilize the recording ink and ink set respectively.

The invention provides a photographic optical system. The photographic optical system sequentially comprises a first lens (focal length being f1), a second lens (focal length being f2), a third lens (focal length being f3), a fourth lens (focal length being f4), a fifth lens (focal length being f5), a sixth lens (focal length being f6) and a seventh lens (focal length being f7) which are coaxially arranged from an object side to an image side, wherein the first lens has negative focal power and an object side surface being a convex surface; and the seventh lens has negative focal power, and satisfies the following conditions: -1.5<f1 / f<-0.5, 1.0<f2 / f<2.5, 0.5<f3 / f<1.5 , -2.5<f4 / f<-0.5, -10<f5 / f<-2, 0.2<f6 / f<1.2, -2.5<f7 / f<-0.4, wherein f is the focal length of the entire system. The photographic optical system with large relative aperture provided by the invention is designed through reasonable surface form optimization, focal power allocation and optical material selection, can provide imaging performance in a low illumination environment, and is clear in imaging.

According to the present invention, it is possible, by using the first and second light source loci, to tone down the influence of the object color of the color information in the image and detect the light source based on the color information having the influence of the object color toned down so as to detect the light source accurately. It is thereby possible to reduce the color failure when controlling the white balance.

An image reproducing and forming apparatus comprises a recording head (14) configured to eject liquid droplets of at least one color and capable of bidirectional recording, and a controller (100) configured to control the amount of liquid adhering to a recording paper (3) so as to reduce color difference occurring in the bidirectional recording. The controller includes a gamma correction unit (133) configured to selectively perform a controlled gamma correction using a controlled gamma value adjusted so as to reduce the color difference or an ordinary gamma correction using an ordinary gamma value.

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a third lens having a positive power; and a fourth lens having a convex surface on the object side near a paraxial axis and having a meniscus shape. The imaging lens satisfies conditional expressions specified in the specification.

A hybrid lens (10) includes a plastic lens (12) and a glass coating film (14). The plastic lens is manufactured by injection molding. The glass coating film is formed on an outer surface of the plastic lens and encloses the outer surface of the plastic lens. The coating film comprises a single layer of glass material or a plurality of layers of glass material. The glass coating film is deposited on the outer surface of the plastic lens by vacuum deposition. The hybrid lens reduces chromatic aberration and provides improved image quality for an imaging system. A method for making the hybrid lens is also provided.

Disclosed is a liquid crystal display capable of ensuring brightness necessary for achieving satisfactory display by increasing ratio of light-emitting time to one frame period. A liquid crystal display is adapted to have a period (non-video signal write period) required for writing non-video signals different from video signals onto all the pixels before a video signal write period. In the non-video signal write period, the non-video signals are written onto the respective pixels, thereby starting response of the liquid crystal before the start of the video signal write period. In the non-video signal write period, a backlight is turned off, and thereby image degradation is prevented even when the non-video signals are written onto the respective pixels.

Provided is a imaging optical system for an image sensor. The imaging optical system includes a stop and a first lens sequentially arranged from an object side. The first lens has aspherical surfaces on both sides and has a positive refractive power, a first surface of the first lens which faces the object side is a convex surface and a second surface of the first lens which faces an image side is a convex surface.

A steerable-light-path optical device includes a light transceiver having an external light path associated therewith, and a path-steering device that controls the direction of the light path relative to a steering axis. The path-steering device has a first beam-deviation optical element including a first prism structure having a first diffraction grating thereon, and a second beam-deviation optical element including a second prism structure having a second diffraction grating thereon. The steering axis passes through the first and second beam-deviation optical elements. A rotational drive is operable to rotate at least one of the first beam-deviation optical element and the second beam-deviation optical element, and preferably both of the beam-deviation optical elements, about the steering axis.

An imaging lens includes a first lens having a negative power and including a concave surface facing an image side, a second lens having a positive power, a third lens having a positive power, an aperture diaphragm, a fourth lens, which is a biconvex lens having a negative power, a fifth lens having a positive power and including a convex surface facing the image side, and a sixth lens having a positive power and including a convex surface facing an object side, which are arranged in this order from the object side. The Abbe number of a material forming the fourth lens with respect to the d-line is 30 or less. When the focal length of the entire lens system is f and a composite focal length from the fourth lens to the sixth lens is f456, the imaging lens satisfies following conditional expression:1.00<f456 / f<1.88.

Apparatus and methods to increase the depth of field in human vision in order to correct for loss in refocusing ability. Optics variations, such as changes in thickness, shape, or index of refraction of contact lenses, intraocular implants, or the shape of the cornea or eye lens, affect the phase, or wavefront, of the light perceived by the eye. The optics variations are chosen such that the resulting optical transfer function remains relatively constant over a desired range of object distances and pupil diameters.

An object of the invention is to provide a solar battery module having a high efficiency power generating ability, a harmony of design without an odd sensation, and a freedom of design. The object is achieved by a solar battery module comprising, on a light-receiving surface thereof, a photoelectric conversion section for converting incident light into electricity, the photoelectric conversion section comprising silicon, and an insulating color film disposed in regions other than the photoelectric conversion section for reducing a color difference from the photoelectric conversion section.

A multifocal diffractive lens comprises a multifocal diffractive structure coupled to a refractive component. The refractive component comprises at least one curved surface. The multifocal diffractive structure comprises a first plurality of substantially monofocal echellettes having a first optical power for near vision correction and a second plurality of substantially monofocal echellettes for far vision correction. The first plurality of substantially monofocal echellettes combined with the second plurality of substantially monofocal echellettes can provide a multifocal diffractive profile having decreased light scatter, chromatic aberration, and diffraction to non-viewing orders such that dysphotopsia is substantially inhibited. A third plurality of substantially monofocal echellettes having an intermediate optical power can be combined with the first plurality of substantially monofocal echellettes and the second plurality of substantially monofocal echellettes.

The invention discloses a creel device of a yarn dyeing machine with an ultra-low bath ratio, which comprises a sand table, a suspender and a yarn rod, wherein the upper surface of the sand table is in a disk shape; the lower end of the sand table is in a cavity structure; the yarn rod is in a hollow barrel structure; a water drum is arranged in the barrel of the yarn rod and is in a hollow or solid columnar structure; the center line of the yarn rod and the center line of the water drum are same; the ratio of the hollow internal diameter of the yarn rod and the external diameter of the waterdrum is 10:7-9; and the barrel of the yarn rod is evenly provided with a plurality of water outlets along the circumference of horizontal cross sections of different heights. The hollow barrel of theyarn rod disclosed by the invention is provided with the water drum, which is favorable for reducing the volume of dye liquor in the yarn rod and for reducing a water bath ratio; under the same main pump power, the water drum is favorable for improving the practical lift of a pipeline relatively, the flow rate of the dye liquor in the yarn rod is improved, the levelling property of cheeses of upper layers and lower layers can be better guaranteed, and the one-time success rate for dyeing is improved; and from the bottom to the top, the water outlets on the barrel of the yarn rod at the outer side of the water drum are thicker at the higher place of the yarn rod, which is favorable for realizing the purpose of even dye transfer.

In some examples, a computing device includes a first display in a first housing and a second display in a second housing. The computing device may determine an angle between the first display device and the second display device, determine a first temperature map of the first housing based on the angle and first temperature data received from a first set of temperature sensors in the first housing, and determine a second temperature map of the second housing based on the angle and second temperature data received from a second set of temperature sensors in the second housing. The computing device may determine a temperature difference between the first display device and the second display device, determine a remedial action, and perform the remedial action to reduce the temperature, color, and / or color intensity difference between the first display device and the second display device.