Abstract: A method for automatically detecting an optical prescription of an eyeglass lens includes emitting illumination light from a plurality of illumination light sources toward an eyeglass lens. Via a camera, the positions of one or more glints caused by the illumination light are detected on a surface of the eyeglass lens. A plurality of match loss values are calculated that quantify differences between the detected glint positions on the surface of the eyeglass lens, and reference glint positions that correspond to a plurality of different reference optical prescriptions. Based on the match loss values, a reference optical prescription is selected as being a best match for the detected glint positions. The set of one or more optical parameters corresponding to the selected reference optical prescription are output.

Abstract: The disclosure provides a system for eye tracking, comprising: at least one light source; at least one metasurface configured to receive light emitted from the at least one light source; at least one detector configured to receive light reflected by an eye of a user from the at least one metasurface and convert the received light into an electrical signal; and configured to control a reflection direction of the light from the at least one light source by the at least one metasurface to enable the reflected light to reach the at least one detector by reflection of the eye of the user. According to the embodiments of the disclosure, all solid-state beam guidance control based on the metasurfaces has the characteristics of fast scanning and wide-angle scanning, resulting in better accuracy of the beam guidance, higher consistency and reliability of the system, and smaller physical sizes.

Abstract: According to embodiments of the disclosure, a method and an apparatus for eye tracking are provided. The method comprises capturing a first image of an eye by a first camera; capturing a second image of the eye by a second camera; determining, based on information of an eye component in the first image and/or the second image, one of the first camera and the second camera as a main camera and the other one as an auxiliary camera; and controlling the main camera to operate at a power higher than that of the auxiliary camera. Therefore, the power consumption during the eye tracking may be reduced by switching between the main camera and the auxiliary camera.

Abstract: A computing system including one or more processing devices configured to calibrate an eye-tracking camera. Calibrating the eye-tracking camera includes receiving lens tolerance range data associated with intrinsic parameters and position parameters of a pancake lens, and further includes receiving image data of one or more ground-truth features. Calibrating the eye-tracking camera further includes, over a plurality of solver iterations, computing estimated values of the intrinsic parameters and position parameters. In each solver iteration, the one or more processing devices compute one or more estimated feature locations based on the image data and perturbed values of the intrinsic parameters and position parameters. The one or more processing devices evaluate a loss function based on the one or more estimated feature locations and ground-truth locations. The one or more processing devices update the perturbed values.

Abstract: A computing system including one or more processing devices configured to calibrate an eye-tracking camera. Calibrating the eye-tracking camera includes receiving lens tolerance range data associated with intrinsic parameters and position parameters of a pancake lens, and further includes receiving image data of one or more ground-truth features. Calibrating the eye-tracking camera further includes, over a plurality of solver iterations, computing estimated values of the intrinsic parameters and position parameters. In each solver iteration, the one or more processing devices compute one or more estimated feature locations based on the image data and perturbed values of the intrinsic parameters and position parameters. The one or more processing devices evaluate a loss function based on the one or more estimated feature locations and ground-truth locations. The one or more processing devices update the perturbed values.

Abstract: Implementations of camera architectures for combined eye-tracking and outward-tracking are provided. One example includes a near-eye device comprising: a frame comprising an arm; an eye illuminator disposed on the arm of the frame, wherein the eye illuminator is configured to project light to an eye of a user; an imaging system disposed on the arm of the frame, wherein the imaging system comprises: an image sensor; and a color filter array comprising: a first set of filters for allowing the projected light from the eye illuminator to pass; and a second set of filters for allowing visible light to pass; and a lens comprising an optical element for: directing the projected light from the eye illuminator to the eye of the user; and directing light reflected off the eye of the user to the imaging system.

Abstract: Implementations of reconstruction of entrance pupils of the human eye are provided. One aspect includes a device comprising a camera system and processing circuitry coupled to memory storing instructions that, when executed by the processing circuitry, causes the processing circuitry to receive image data from the camera system, and extract a set of features from the image data. Extracting the set of features comprises classifying the features into a plurality of feature types. The processing circuitry is further configured to calculate a set of feature measurements from the extracted set of features, and perform an entrance pupil reconstruction process for determining entrance pupil position data using the set of feature measurements.

Abstract: Embodiments of the disclosure provide an eye detection apparatus and an electronic device. The apparatus includes a transmitting-side assembly and a receiving-side assembly. The transmitting-side assembly includes a light source and a light modulation element, wherein the light modulation element is configured to modulate light emitted by the light source to generate a patterned light beam for forming discrete light spots on an eye. The receiving-side assembly includes a camera configured to acquire an eye image including an image of the discrete light spots to create three-dimensional topographical information of the eye.

Abstract: The disclosure provides a method for an electronic device including a lens; a plurality of light sources disposed on or adjacent to an edge of the lens, and configured to illuminate an eye of a user; at least one camera disposed adjacent to the edge of the lens, and configured to capture an image of the eye; and a controller configured to perform eye tracking for the user based on the image captured by the at least one camera. According to the embodiments of the disclosure, on a premise that the characteristics of the lens are not affected by the electronic device, a feasibility of capturing the eye image and quality of the image are ensured.

Abstract: A medical device (100), comprising: a stent graft (110), defined thereon with an opening (111); a catheter (120), configured to be partially arranged inside the stent graft (110); and a restraint member (130), configured to apply a radial compression force to the stent graft (110), so as to radially compress the stent graft (110) into a compressed configuration; the medical device (100) is configured so that the opening (111) is in positional correspondence with a distal end of the catheter (120) when the stent graft (110) is in the compressed configuration; the distal end refers to an end that first enters a body of a patient during use of the medical device (100). The medical device (100) can be used for the treatment for vascular lesions involving the aortic arch, which is favorable for establishing access in the branch vessel and shortening the operation duration.

Abstract: An optical device is provided, including a body formed to have a concavity within which an eye box region is defined; and a plurality of addressable vertical cavity surface emitting laser (VCSEL) arrays arranged in the body of the optical device. The one or more VCSEL arrays comprise a plurality of VCSEL subarrays including independently addressable first and second VCSEL subarrays, which are controlled so as to power the first VCSEL subarray and not the second VCSEL subarray to illuminate only a first subregion of the eye box region, or to power the second VCSEL subarray and not the first VCSEL subarray to only illuminate a second subregion of the eye box region.

Abstract: An optical device is provided, including a body formed to have a concavity within which an eye box region is defined; and a plurality of addressable vertical cavity surface emitting laser (VCSEL) arrays arranged in the body of the optical device. The one or more VCSEL arrays comprise a plurality of VCSEL subarrays including independently addressable first and second VCSEL subarrays, which are controlled so as to power the first VCSEL subarray and not the second VCSEL subarray to illuminate only a first subregion of the eye box region, or to power the second VCSEL subarray and not the first VCSEL subarray to only illuminate a second subregion of the eye box region.

Abstract: A covered stent and a medical device. The medical device includes a covered stent including a main stent and a first branch stent. A first interface, a second interface and a third interface are provided on a side surface of the main stent and spaced along an axial direction of the main stent, the first interface receives the first branch stent, the second interface receives a second branch stent, and/or the third interface receives a third branch stent. The covered stent further includes a restraining assembly arranged on the main stent, and the restraining assembly applies to the main stent a tensile force toward an inner cavity of the main stent. At least a portion of the main stent that is provided with the second interface and the third interface is recessed toward the inner cavity of the main stent.

Abstract: Systems, methods, and computer-readable media are disclosed for improved camera color calibration. An example method may involve capturing a first wavelength emitted by a first type of traffic light. The example method may also involve determining, based on the first wavelength, a first color value associated with the wavelength emitted by the first type of traffic light. The example method may also involve capturing, by a first camera, a first image, video, or real-time feed of a first portion of a test target, the first portion of the test target including a first light color that is based on the first color value. The example method may also involve determining, based on the first image, video, or real-time feed of the first portion of a test target, a second color value output by the camera. The example method may also involve determining, based on a comparison between the first color value and the second color value, that a difference exists between the first color value and the second color value.

Abstract: Systems, methods, and computer-readable media are disclosed for improved camera color calibration. An example method may involve capturing a first wavelength emitted by a first type of traffic light. The example method may also involve determining, based on the first wavelength, a first color value associated with the wavelength emitted by the first type of traffic light. The example method may also involve capturing, by a first camera, a first image, video, or real-time feed of a first portion of a test target, the first portion of the test target including a first light color that is based on the first color value. The example method may also involve determining, based on the first image, video, or real-time feed of the first portion of a test target, a second color value output by the camera. The example method may also involve determining, based on a comparison between the first color value and the second color value, that a difference exists between the first color value and the second color value.

Abstract: The present disclosure provides a monitoring wafer and a monitoring system. The monitoring wafer includes: an initial wafer, a searchlight module, a data acquisition module and a wireless transmission module, the searchlight module is configured to emit searchlight to the wafer chuck, the data acquisition module is configured to acquire searchlight information of the searchlight on the wafer chuck, and the wireless transmission module is configured to receive and transmit the searchlight information.

Abstract: An active depth imaging system and method of operating the same captures illuminator-on and illuminator-off image data with each of a first and second imager. The illuminator-on image data includes information representing an imaged scene and light emitted from an illuminator and reflected off of objects within the imaged scene. The illuminator-off image data includes information representing the imaged scene without the light emitted from the illuminator. For each image set captured by the first and second imagers, illuminator-off image data is subtracted from the illuminator-on image data to identify the illuminated light within the scene. The depth of an object at which the light is incident on then is determined by the subtracted image data of the first and second imagers.

Abstract: A method for high-throughput assay processing includes (a) modulating temperature of a plurality of samples disposed in a respective plurality of fluidic channels on an image sensor wafer, including a plurality of image sensors, by heating the image sensor wafer using a heating module thermally coupled with the image sensor wafer, to control reaction dynamics in the samples, and (b) capturing a plurality of fluorescence images of the samples, using the plurality of image sensors, to detect one or more components of the plurality of samples. A method for manufacturing a high-throughput fluorescence imaging system with sample heating capability includes (a) bonding a fluidic wafer, including a plurality of recesses, to an image sensor wafer including a plurality of image sensors, and (b) bonding a heating module, including a heater for generating heat, to the image sensor wafer to thermally couple the heater and the image sensor wafer.

Abstract: An avalanche photodiode has a first diffused region of a first diffusion type overlying at least in part a second diffused region of a second diffusion type; and a first minority carrier sink region disposed within the first diffused region, the first minority carrier sink region of the second diffusion type and electrically connected to the first diffused region. In particular embodiments, the first diffusion type is N-type and the second diffusion type is P-type, and the device is biased so that a depletion zone having avalanche multiplication exists between the first and second diffused regions.

Abstract: A photon detection device includes a single photon avalanche diode (SPAD) disposed in a semiconductor layer. A guard ring structure is disposed in the semiconductor layer surrounding the SPAD to isolate the SPAD. A well region is disposed in the semiconductor layer surrounding the guard ring structure and disposed along an outside perimeter of the photon detection device. A contact region is disposed in the well region only in a corner region of the outside perimeter such that there is no contact region disposed along side regions of the outside perimeter. A distance between an inside edge of the guard ring structure and the contact region in the corner region of the outside perimeter is greater than a distance between the inside edge of the guard ring structure and the side regions of the outside perimeter such that an electric field distribution is uniform around the photon detection device.