1286results about How to "Large field of view" patented technology

An eye tracker having a waveguide for propagating illumination light towards an eye and propagating image light reflected from at least one surface of an eye, a light source optically coupled to the waveguide, and a detector optically coupled to the waveguide. Disposed in the waveguide is at least one grating lamina for deflecting the illumination light towards the eye along a first waveguide path and deflecting the image light towards the detector along a second waveguide path.

A wearable display system, such as a Head Mounted Display, having a display engine producing light, preferably linearly polarized light, which defines a synthetic image that is relayed to a wire grid polarizing combiner which overlays the synthetic image onto a real image of an object of the outside world, and wherein the real image is contemporaneously viewed through the wire grid polarizing combiner by the wearer of the system. The wire grid polarizing combiner can be curved in at least one axis, and preferably two axis such that optical power is added to the wire grid polarizing combiner.

Apparatus for assaying an analyte in blood in a patient's blood vessel comprising: a light provider comprising at least one light source that illuminates a tissue region in which a blood vessel is located with light that stimulates photoacoustic waves in the region; at least one acoustic transducer that generates signals responsive to the photoacoustic waves; a controller that receives the signals and processes them to determine which are responsive to photoacoustic waves that originate in the blood vessel and uses the determined signals to assay the analyte; wherein, the light provider and at least one transducer define a field of view that overlaps the blood vessel, said field of view having a central region and a lateral extent greater than about 4 mm.

An apparatus for imaging one or more selected fluorescence indications from a microfluidic device. The apparatus includes an imaging path coupled to least one chamber in at least one microfluidic device. The imaging path provides for transmission of one or more fluorescent emission signals derived from one or more samples in the at least one chamber of the at least one microfluidic device. The chamber has a chamber size, the chamber size being characterized by an actual spatial dimension normal to the imaging path. The apparatus also includes an optical lens system coupled to the imaging path. The optical lens system is adapted to transmit the one or more fluorescent signals associated with the chamber.

The disclosure discloses a method and an apparatus for combining panoramic image. The method includes: obtaining multiple original images of the same scene, performing folding change and coordinates transformation to the multiple original images, and determining an overlapping area of the multiple original images; establishing a mathematical model of the multiple original images, aligning the overlapping area of the multiple original images, and transforming the multiple original images to a coordinate system of a reference image; obtaining the space transformation relationship among / between the multiple original images according to the coordinate system of the reference image, selecting an appropriate image combining strategy, and completing the combining of the images. The solution can realize obtaining scene picture with large field of view without reducing image resolution.

The invention relates to a small and light wide-field free-form surface prism HMD optical system, which belongs to the field of optical system and device design and is applied to the virtual reality and augmented reality field. The invention comprises a free-form surface prism with three optical surfaces, and a micro-image display; the free-form surface prism is made of plastic glass materials with the refractive index greater than 1; the three free-form optical surfaces are concave surfaces, which meet one of the three surface-type equations, and the location relationship of each surface meets three condition equations; the incident angle formed between the widest-field upper edge rays emitted by an LCD and the second free-form surface meets the total reflection conditions; and an image source element is an LCD of 0.61 or 0.59 inches. The small and light wide-field free-form surface prism HMD optical system is light and compact and has the advantages of good aberration correction and high light energy utilization rate; the optical system enables the observer to see clear images in a wide field of view, and the displayed images do not have apparent brightness attenuation and can not easily cause visual fatigue to the observer.

A high performance objective having very small central obscuration, an external pupil for apertureing and Fourier filtering, loose manufacturing tolerances, large numerical aperture, long working distance, and a large field of view is presented. The objective is preferably telecentric. The design is ideally suited for both broad-band bright-field and laser dark field imaging and inspection at wavelengths in the UV to VUV spectral range.

The present invention allows a user to arbitrarily position display screens so that a larger field of view can be presented by a computer system that senses the screen positions and provides appropriate display information. This is in contrast to the typical use of display screens where a single display screen is used and the position of the display screen is assumed to be directly in front of a user's viewpoint. For example, two screens can be placed side-by-side so that their viewing surfaces together form a rectangular plane. This can be useful for viewing movies or other presentations that benefit from a larger horizontal viewing field. More complex arrangements of multiple screens can be set up for more immersive presentations such as virtual reality, simulations, computer games, etc. A mounting bracket for holding screen in a fixed orientation with respect to each other is described. A preferred embodiment of the bracket includes a visual indicator for determining the angle of a screen with respect to another.

Visual aids and associated methods for improving the eye sight of low vision patients are provided. Generally, the devices of the present disclosure address the needs of age-related macular degeneration (AMD) and other low vision patients by providing a magnified retinal image while keeping a large visual field of view. Further, the devices of the present disclosure allow direction of the magnified retinal image away from damaged portions of the retina and towards healthy, or at least healthier, portions of the retina. The devices of the present disclosure are also configured for implantation within the eye using minimally invasive surgical procedures. Methods of utilizing the devices of the present disclosure, including surgical procedures, are also provided.

A system and method for performing optical navigation uses scattered light to produce frames of image data to estimate displacement with respect to a target surface. The scattered light is produced from an illumination beam of light emitted along a first optical axis onto the target surface. The illumination beam of light also produces a specularly reflected beam of light along a second optical axis. The scattered light about a third optical axis, which is offset by a predefined angle with respect to the second optical axis, is received at an image sensor array to produce the frames of image.

The invention provides a conjugated narrow-band tri-phosphor staggered volume holographic grating waveguide near-to-eye optical display device. The device comprises an image display light source which is used for providing image information to be viewed, a P&S photo-conversion component which is used for converting P light and S light, a collimating lens group which is used for collimating light wave, a PBS component which is used for the polarizing beam-splitting of light wave, a beam-splitting selecting component which is used for uniformly spreading the light wave on a coupling input surface; a conjugated tri-phosphor staggered coupling input volume holographic grating which is used for dispersing incident ray and totally reflecting and transmitting the ray inside the substrate, a light-guide transmitting substrate which is used for totally reflecting and transmitting the light wave, and a conjugated tri-phosphor staggered coupling output volume holographic grating which is used for coupling the dispersed incident ray in sequence and outputting the ray to the outside of the substrate. The device has the advantages of full color, ultra-thinness, large field angle and simplicity in process and implementation, and can be applied to the damage-free display of a mobile screen, the display of a terminal, the scene teaching instruction for a doctor, the real-time information positioning for fire fighting, 3D game and other fields.

A multimodal probe system for spectroscopic scanning of tissue for disease diagnosis. The system can use diffuse reflectance spectroscopy, fluorescence spectroscopy and Raman spectroscopy for the detection of cancerous tissue, such as tissue margin assessment.

The invention relates to an eyepiece, in particular to an eyepiece used in a head-mounted display, belonging to the field of optical technique. The eyepiece is formed by six pieces of lenses, and a lens screen, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the observing side of human eyes and the display device side along the direction of an optic axis in a coaxial way; the exit pupil diameter of the eyepiece is larger than that of the common eyepiece, the eye relief is long, the angle of view field is large, and the focal distance and F / # are small; furthermore, illuminance of image plane is evener, so that the eyepiece especially meets the requirements of the head-mounted display.

A wearable display system, such as a Head Mounted Display, having a display engine producing light, preferably linearly polarized light, which defines a synthetic image that is relayed to a wire grid polarizing combiner which overlays the synthetic image onto a real image of an object of the outside world, and wherein the real image is contemporaneously viewed through the wire grid polarizing combiner by the wearer of the system. The wire grid polarizing combiner can be curved in at least one axis, and preferably two axis such that optical power is added to the wire grid polarizing combiner.

The invention relates to a method of controlling a holder camera to automatically track a target. The method comprises the following steps. A tracking model is automatically chosen. A video frequency processing module automatically chooses an automatic tracking model and a global search model according to the tracking state of the target. The processing process of the automatic tracking model is that the video frequency processing module judges the state of the holder camera and after the tracked target is matched, control orders are sent according to the position and size of the target to regulate the position and the focal distance of the camera. The processing process of the global search model is that the video frequency processing module detects and matches the target through a taking turn manner in a plurality of search areas of a monitored area until the tracked target is found. The invention has reasonable design, realizes the automatic tracking function of the camera on the target, ensures that the position and size of the target are suitable for monitoring, has the advantages of high tracking precision, strong real-time property, low cost, flexible expansion and the like, facilitates the use of monitoring staff and improves the work efficiency of the monitoring staff.

The invention provides a diopter-adjustable curved surface waveguide near-to-eye optical display device which comprises an image display light source used for providing image information used for observation, a collimating lens set used for collimating optical waves, a PBS (polarization beam-splitting) assembly used for performing polarization beam-splitting on the optical waves, a P&S photo-conversion assembly used for realizing conversion of P light and S light, a P&S beam-splitting selection assembly capable of enabling the optical waves to uniformly cover a coupling input surface, a micro-curved surface waveguide substrate used for performing total-reflection propagation on the optical waves, and a micro-local curvature coupling output surface used for enabling the transmitted optical waves to be coupled and output out of the substrate, expanding a view field angle and adjusting the diopter. The diopter-adjustable curved surface waveguide near-to-eye optical display device has the advantages of adjustable diopter, lightweight, thinness, large view field angle, simplicity for processing and design, easiness for realization, compact structure and high energy utilization rate of an image source, can be used in various fields of remote medical information teaching, virtual reality simulation training, fire rescue information positioning guidance, road enhancement display and the like, and can be used as a display of a terminal.

A bank angle detecting device includes a roll rate sensor for detecting a angular velocity ωr about a longitudinal axis of the motorcycle; a yaw rate sensor for detecting a angular velocity ωy about an vertical axis of the motorcycle; a bank angle detecting unit for detecting the motorcycle bank angle δ for calibration use based on the yaw rate ωy and a traveling velocity v; and a bank angle correcting unit for correcting the basic motorcycle bank angle δr, determined from an output ωr of the yaw rate sensor, so as to approach the motorcycle bank angle δ that is detected by the bank angle detecting unit, to thereby determine the estimated bank angle δ0.

An apparatus (100) for obtaining an image of the eye, has an alignment section (160) for aligning the pupil of the eye along an optical axis and a pupil sensor (170) for identifying pupil location and dimensions. An illumination section (112) has a light source (114) for providing an illumination beam and a spatial light modulator (125) for positioning and shaping the illumination beam according to the sensed location and dimensions of the pupil. An illumination beam partitioning mechanism (50) segments the illumination beam directed toward the pupil of the eye into at least one light-bearing segment (150) and at least one blocked segment. An actuator (132) coupled to the illumination beam partitioning mechanism (50) scans the at least one light-bearing segment (150) of the illumination beam across the pupil of the eye. An image sensor (146), aligned along the optical axis, obtains reflected light from the eye.

An ophthalmic visualization system can include an imaging device configured to acquire images of a surgical field; a computing device configured to determine an area of interest based on the images; and a display device in communication with the computing device and a surgical microscope, wherein the display device is configured to provide a graphical overlay onto at least a portion of a field of view of the surgical microscope, and wherein the graphical overlay includes a magnified image of the area of interest. A method of visualizing an ophthalmic procedure can include receiving images of a surgical field acquired by an imaging device; identifying an area of interest; generating a graphical overlay including a magnified image of the area of the interest; and outputting the graphical overlay to a display device such that the graphical overlay is positioned over a field of view of a surgical microscope.

A wide angle imaging system for providing a wide angle field of view of an area exteriorly of a vehicle includes an image capture device having a field of view directed exteriorly of the vehicle, an outer wide angle lens, a focusing lens and a display. The image capture device may comprise an array of pixels and may have a coarse distribution of pixels and a fine distribution of pixels. The display may be operable to display a substantially undistorted image to the driver or occupant of the vehicle in response to a signal output of the image capture device.

The invention provides an airborne laser communication equipment and a control method thereof. Beacon light and source light are received by the same receiving antenna, separated, processed and transmitted to a control module, pitch and azimuth angles of equipment are regulated on the basis of received beacon light and source light signals, signal tracking is performed, and fed-back beacon light and source light signals are transmitted through two different transmitting terminals, so that exchange work of signals of both sides is guaranteed. The airborne laser communication equipment and control method thereof solve the technical problems that the communication speed and the image resolution cannot meet requirements and wide coverage and real-time transmission cannot be guaranteed simultaneously in the prior art.

Improved camera calibration techniques, including an improved up look angle and an improved method for calibrating a virtual center of projection. By using a view camera technique for the up look angle, the image sensors can be mounted flat to a Printed Circuit Board (PCB). By using a sub-region of the image sensor for the active area of the camera it is possible to calibrate the virtual center of projection (C′).

The invention discloses a face recognition method and device. The method comprises collecting images including a face image; acquiring facial features of a face in the images; matching the acquired facial feature in a facial feature database, and determining a match range, a mismatch range or an to-be-recognized range, to which the match result belongs; sending a target person recognition prompt information if the match result belongs to the match range; sending a non-target person prompt information if the match result belongs to the mismatch range; and returning and executing the step of collecting images including the face image until detecting an end instruction or sending the target person recognition prompt information and the non-target person prompt information if the match result belongs to the to-be-recognized range. According to the invention, a processor can recollect the images until the image is recognized accurately when the match result belongs to the to-be-recognized range resulting from the fact that the camera picked up a blur image or the deflection angle between the target person and the camera exceeds a definite angle.

The invention provides a laser radar and a working method thereof. The laser radar comprises a transmitting device, a beam splitting device, a galvanometer and a receiving device, wherein the transmitting device is used for transmitting a first laser beam to a to-be-detected object; the beam splitting device is used for splitting the first laser beam into a plurality of second laser beams, and thepropagation directions of the multiple second laser beams are different; the galvanometer comprises a first reflecting surface, the first reflecting surface is used for reflecting the second laser beams, the galvanometer is provided with a first rotary shaft and is rotated around the first rotary shaft, and an included angle between the first rotary shaft and a normal line of the first reflectingsurface is greater than zero; the receiving device is used for receiving echo beams reflected by the to-be-detected object. The laser radar has the advantage that the larger field angle can be obtained through smaller rotation angle of the galvanometer.

The invention provides a dentiform embedded planar waveguide optical device which comprises an image light source, a collimating lens, a coupling input surface, a planar waveguide substrate and a micro dentiform structure, wherein the image light source is used for emitting display optical waves for displaying a required image, the collimating lens is used for collimating the optical waves emitted by the light source, the coupling input surface is used for coupling the collimated optical waves into a planar waveguide, the planar waveguide substrate is used for performing reflecting propagating on the coupled optical waves to form total reflection optical waves, and the micro dentiform structure is used for outputting the total reflection optical waves in a coupled manner. The dentiform embedded planar waveguide optical device has characteristics of being simple in processing process, easy to realize, light in weight, compact in structure, flexible in vision field increase and high in optical wave coupling efficiency, not only can be used for wearable display, but also can be used for the application fields such as extension uniform illumination, naked eye 3D display and mobile screen display.

The invention discloses a head-raising display device which can realize large-visual-field-angle double-picture displaying and a vehicle with same. The head-raising display device matches an image display unit in use and comprises an image generating unit and an image projection unit which is arranged between the image generating unit and the image display unit. The image generating unit at least can generate a first light beam which represents a first image and a second light beam that represents a second image. The image projection unit at least comprises a first optical module and a second optical module. The first optical module reflects the first light beam and performs beam expanding for forming a first emergent light beam. The second optical module reflects the second light beam and performs beam expanding for forming a second emergent light beam. The first optical module and the second optical module are constructed in a manner that the first emergent light beam and the second emergent light beam are deviated from each other in a manner that an included angle exists between each other, thereby correspondingly projecting a first virtual image picture and a second visual image picture which are not overlapped with each other on the image display unit to the visual field of a user.