66 results about "Intermediate distance" patented technology

A contact lens with a central region (10) that is optimally less than approximately 1.9 millimeters in diameter and that is preferably overcorrected by approximately 25% to 100% over the correction needed for reading. Unexpectedly, the central region (10) does not impair distance vision, but compensates for presbyopia and therefore alows a user to focus on objects within a range of near and intermediate distances. A method for fitting the contact lens is also provided.

Ophthalmic lens including at least one spherical face with an optical centre and a geometrical centre, and having in succession a top vision region, an intermediate vision region and a bottom vision region, with a principal meridian of progression traversing the three vision regions of the aspherical face, the lens being noteworthy in that the top vision region is adapted for mid-distance vision, the bottom vision region is adapted for near-distance vision, and the intermediate vision region is adapted for intermediate distance vision, and in that the optical centre of the aspherical face is in the intermediate vision regionn, the optical centre coinciding with the geometrical centre of aspherical face. This lens is particularly suitable for people with emmetropic longsightedness.

A lens, system and/or method for providing custom ocular aberrations for enhanced higher visual acuity. Scaled versions of a patient's aberration pattern may either attenuate or amplify the overall amount of ocular aberrations, to either correct or partially correct a patient's aberrations leading to enhanced visual acuity and/or extended depth of focus. This may be binocularly applied in order to provide high visual acuity in a patient at least at near, far and intermediate distances. The method may include obtaining an optimized binocular summation of both eyes of the patient; designing a first lens solution to correct or partially correct the dominant eye's aberrations according to an attenuated scaled version of a patient's ocular aberrations in the dominant eye; and designing a second lens solution to provide an additional customized extension of depth of focus by the induction of scaled patterns of ocular aberrations in the non dominant eye.

A fast image region partition method receives a component labeled image and performs a two pass Zone Of Influence (ZOI) creation method to create a Zone Of Influence (ZOI) image. The two pass ZOI creation method performs a first pass scan to create a first pass intermediate distance image and a shortest distance component label image. It then performs a second pass scan using the first pass intermediate distance image and the shortest distance component label image to create a background distance transform image and a updated shortest distance component label image. An adaptive image region partition method receives a component labeled image and performs an adaptive two pass ZOI creation method to create an adaptive ZOI image. The distance lengths of the two pass adaptive ZOI creation method depend on their associated component labels. An adaptive cell segmentation method receives a nuclei mask image and a cell mask image. It performs adaptive nuclei region partition using the nuclei mask image to create adaptive nuclei mask ZOI. An adaptive cell region separation method uses the cell masks and the adaptive nuclei mask ZOI to generate adaptive cell separated regions. An adaptive dilation method receives an image and performs an adaptive background distance transform to create an adaptive background distance transform image. A threshold is applied to the adaptive background distance transform image to generate adaptive dilation image output. An adaptive erosion method receives an image and performs an adaptive foreground distance transform to create an adaptive foreground distance transform image. A threshold is applied to the adaptive foreground distance transform image to generate adaptive erosion image output.

Embodiments of the present invention relate to a multifocal lens having a mostly spherical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens.

Extended area lighting devices include a light guide and diffractive surface features on a major surface thereof. The diffractive surface features include diffractive features of different pitches in non-overlapping regions of the major surface tailored to extract guided-mode light of different colors from the light guide in different directions. The diffractive features extract light such that an ordinary user observes substantially different colors in different regions of the light guide, providing a colorful appearance. Notwithstanding this, the diffractive features also extract light such that the lighting device illuminates a reference surface, disposed at an intermediate distance from the light guide, with illumination light that is substantially uniform in color and substantially white. Optical films having diffractive features that can be used to construct such devices and light guides are also disclosed. The concept can also be extended to embodiments in which the uniform color illumination light is not substantially white.

The invention discloses an optical signal sending system, a receiving system, a method and a communication system. According to the invention, laser signals from a light source can be divided into a plurality of channels of laser sub-signals. The to-be-sent electric signal of each branch of all optical signal generating branches is loaded to the laser sub-signal of the branch to be modulated, andthen various optical signals different in power are formed. The signals are transmitted to an optical signal receiving system through multi-core optical fibers. Based on different powers of all branches of optical signals, the optical signal receiving system modulates the optical signals through the serial demodulation process so as to obtain signals respectively transmitted through all optical signal generating branches. According to the invention, the requirement on the hardware number of a transceiving system is low, and the usage of an active photoelectric device is reduced. The cost, thespace and the power consumption of the system are reduced. The parallel transmission of multi-channel data is realized through multi-core optical fibers, and the space utilization rate and the totaltransmission rate of the system are improved. Through adopting the serial demodulation, the correct demodulation of multi-channel signals is realized. The frequency spectrum efficiency of the system is improved. The invention is particularly suitable for the large-capacity and short-and-intermediate-distance communication transmission.

The present invention provides a translating contact lens having a central axis, an anterior surface and an opposite posterior surface. The anterior surface includes an optical zone and a ramped ridge zone, which is disposed below the optical zone and capable of controlling contact lens position on an eye in primary gaze or translating amount across the eye when the eye changes from gazing at an object at a distance to gazing at an object at an intermediate distance or at a nearby object, or both.

The invention discloses an antenna structure and a design method thereof. The antenna structure comprises a linear array radiation unit and a substrate integrated waveguide feeding network, wherein an output end of the substrate integrated waveguide feeding network is connected with an input end of the radiation unit, a substrate integrated waveguide power distributor is of a structure for dividing one path into six paths, the structure for dividing one path into six paths comprises an input passage and six output passages, a metal hole is formed in an inlet of each output passage and is used for adjusting power and phase of the output passage, and an outlet of each output passage is connected with the radiation unit. By the antenna structure, an intermediate-long combined antenna based on a compact feeding network is achieved, and the size of the feeding network is greatly reduced. By the antenna, the demands of intermediate-distance test and long-distance test of a radar can be simultaneously satisfied, a millimeter-wave switch is not needed to switch among various antennas, and meanwhile, the antenna structure has the advantages of compactness, low cost, low profile, small size and the like.

In a disk drive, a method for servo burst-decoding demodulation that accommodates track pitch variation. Depending on the distance a read head is displaced from a read head target position, a target-based blending scheme, a position-based blending scheme, or a weighted combination of both is used to determine the position of the transducer head. When the transducer head is relatively close to the target position, the target-based blending scheme is used to decode servo bursts and calculate the exact head position. When the transducer head is relatively far from the target position, the position-based blending scheme is used to decode servo bursts and calculate head position. When the transducer head is an intermediate distance from the target position, a weighted combination of the target-based and position-based blending schemes is used.

The invention, which belongs to the protection equipment field, discloses a long-distance anti-counterfeiting face iris capturing apparatus and method of a moving target. The capturing apparatus comprises at least one camera group including a plurality of pairs of cameras, a shooting camera for shooting an anti-counterfeiting face iris of a moving target, and a zoom lens control device connected with a control module. Each pair of cameras is capable of forming binocular parallax independently and has same shooting areas; one large camera group includes a plurality of camera pairs; each pair of cameras has different focal lengths; all camera groups are connected with the control module as central data processing and control equipment. The zoom lens control device cooperating with the shooting camera is used for adjusting the focal length of the shooting camera. Compared with the prior art, the long-distance anti-counterfeiting face iris capturing apparatus has the following advantage: the plurality of cameras that are formed by a plurality of camera pairs and correspond to long-distance, intermediate-distance, and short-distance targets are capable of detecting moving targets at different distances in the monitoring area, so that a problem that the cameras extract too small target signals because of long distances of the targets and thus the targets can not be extracted or are extracted unstably, so that the system is not reliable is solved.

The invention relates to a method of controlling a temporal variation of light emitted by an illumination system. The light emitted by the illumination system varies from light having a start color point (14) to light having a target color point (12). The start and target color point are defined in a first color space (XYZ, RGB_vid, RGB_ill), which is perceptually non-uniform. The method according to the invention converts the start and target color point from the first color space to a second color space (Lab, Lch), which is more uniform to the human visual system than the first color space. The method further comprises a step of generating an intermediate color point (34, I1, , I2) located on a transition-path (p, p′) within the second color space, an intermediate distance (d) between the start color point in the second color space and the intermediate color point in the second color space not being larger than a threshold distance (26). The method further comprises converting the intermediate color point from the second color space back to the first color space, and subsequently altering the light emitted by the illumination system (65) from the start color point to the intermediate color point. The invention further relates to an illumination system and a display device.

Apparatus (1) comprises a trough(2) with two rotatably arranged shafts (3) extending alongside each other, which shafts (3) are each provided with paddles (7) spaced apart in axial direction with an intermediate distance. The paddles (7) extend substantially in a radial plane with respect to the shafts (3) and extend in circumferential direction over at least a part of the circumference. In circumferential direction, the paddles (7) are at least partly wedge-shaped. Upon opposite rotation of the shafts (3), successive paddles (7) mesh alternately, thereby forming a gap narrowing again and again. Per shaft (3), successive paddles (7) in axial direction are staggered relative to each other in circumferential direction through an angle.

Methods and apparatus for lenses and glasses are provided in which a lens (10) is formed with a thickness of less than 5 millimeters without grinding, and has two viewing segments (12 and 14). The first viewing segment (12) has a magnification power to correct for effects of presbyopia for near range viewing, and the second viewing segment (14) has a magnification power to correct for effects of presbyopia for intermediate range viewing.

The combined sensor of the present invention is comprised of an MW sensor and a PIR sensor, in which the frequency difference of two microwaves transmitted by the MW sensor is set such that the phase difference between the IF signals received by the MW sensor is approximately 180° when there is an object at the intermediate distance between the maximum detection distance within the target detection area and the maximum detection distance in the event of a deviation of the detection area attributable to mounting error of the infrared sensor 4.

An apparatus for taking over singulated objects, in particular at least slightly elongated objects, wherein the objects are supplied on an endless feed conveyor (1) which is formed by two endless conveyor strips forming a V-channel, and wherein the objects are subsequently transferred to a following endless sorting conveyor (3) with transport positions at fixed mutual intermediate distances or pitch distances, wherein the apparatus further comprises an endless positioning conveyor (2) , immediately following the feed conveyor, as well as a control, which controls the speed of the conveyor (1) and of the positioning conveyor (2) , and hence the transfer of the objects onto the positioning conveyor (2) , wherein the intermediate distances of the transferred objects on the positioning conveyor correspond to values previously entered in the control, and wherein the objects are taken over from the positioning conveyor by the sorting conveyor (3) by means of grippers (4) . Preferably, at take-over by the grippers, the speed of the positioning conveyor and of the sorting conveyor are substantially equal. Such a conveyor system sa suitably sort delicate products such as chicory or pears whilst avoiding these products being damaged.

A conveyor chain (1) , comprising a series of sheet metal chain links (2) which are each provided with a basically rectangular conveying body part (3) and with a hinge assembly (4) , which hinge assembly comprises a centrally located hinge loop (7) and comprises a pair of hinge loops (10) spaced apart with an intermediate distance (9) on the opposite longitudinal side of the chain link, wherein the central loop is located in the intermediate space of a successive module(2'), wherein the hinge assembly(4) further comprises two auxiliary hinge loops (12) , wherein the cooperating hinge loops ofsuccessive modules are connected by means of hinge pins (14) , the thickness of the sheet metal of the conveying body part being between approximately 2.0 mm and approximately 2.8 mm, and wherein thediameter of the hinge pin is between approximately 3.0 and 5.0 mm .