12 results about "Pupil" patented technology

The present invention is an image display device in which a two-dimensional image displayed on an image display element is observed by an observer as a magnified virtual image through a virtual image optical system. The second optical plane (15c) on the side of the optical pupil (19) and the reflection and transmission of the optical axis having an angle greater than or equal to 30 degrees and less than 90 degrees with the normal line of the first optical plane or the second optical plane surface (16), which reflects or transmits the image light incident from the incident optical surface (15a), and the incident optical surface makes the relay optical system (12) shown in the image display element (11) ) transited image light incident; reflective optical element (18), reflecting so that the image light reflected on the reflective transmission surface and emitted from the first optical plane is directed to the reflective transmission surface and becomes parallel light; and the phase difference optical element (17), arranged in the optical path between the first optical plane and the reflective optical element, to convert the polarization state of the image light.

A patient immobilization device for immobilizing a patient and performing a diagnostic evaluation of such patient is comprised of a backboard, a structure configured to support the head of a patient on the backboard, and a pupil-sizing indicator positioned on a surface of the support structure to be visually accessible to a person that is visually evaluating the head and face of an immobilized patient on the backboard.

The invention discloses a head mounted eye tracker detection method, which comprises the steps of extracting the cornea emitting facula center; extracting the feature points of the pupil outline and fitting the pupil outline. The head mounted eye tracker detection method has the advantages that the position of the eye fixation point is worked out according to the anti-interference performance of an infrared light source, then, the positions of eyes during eye closing and eye twinkling are fit according to a tracking algorithm, the eye movement fixation orientation can be precisely measured, the precision of an identification algorithm is high, and the measurement on the eye movement fixation orientation at a high-precision requirement can be met.

The present disclosure provides embodiments of improved systems, head mounted devices (HMDs) and methods for adjusting a position of an HMD with respect to a user based on one or more measurements, which are specific to the user. One embodiment of the improved method includes receiving data from an eye tracking system of an HMD worn by a user, where the data is generated by the eye tracking system in response to the user gazing upon a virtual image plane of the HMD; using the received data to calculate a distance between the virtual image plane of the HMD and a pupil plane of the user; and adjusting a position of the HMD with respect to the user based on the calculated distance.

The invention discloses a head-mounted multifunctional working lamp control system, which comprises a central processor, a pupil tracking module, a ranging module, an actuator module, a light induction module, a brightness control module and a power supply module, wherein according to information provided by the pupil tracking module, the ranging module and the light induction module, the central processor carries out comprehensive processing and outputs control signals to the actuator module, the brightness control module and the power supply module; and the power supply module provides power for the central processor and each module in the system. Accurate light fixed spot irradiation is provided for a worker in need of lighting in different environments, the lamp brightness is changed according to the light changes in the environment, and the best lighting effects are thus achieved.

The invention discloses a head-mounted multifunctional binocular training lens. The head-mounted multifunctional binocular training lens comprises a bridle. The front end of the bridle is connected with a bridle fixing plate. The front end of the bridle fixing plate is provided with a fixing pile. The front end of the fixing pile is connected with a longitudinal positioning connecting rod throughan adjusting and fixing nut. The bottom of the longitudinal positioning connecting rod is connected with a lens cone cross connecting rod through a horizontal connecting plate. The middle position ofthe lens cone cross connecting rod is provided with a pupil distance adjusting knob. Two ends of the lens cone cross connecting rod are moveably connected with a vertical connecting plate through gears. The bottom end of the vertical connecting plate is fixedly connected with a lens cone fixing frame. The lens cone fixing frame is sheathed with a lens cone. The lens cone is internally provided with an eye lens and an objective lens capable of adjusting the distance. Through adjusting the distance between the eye lens and the objective lens, the different optical precisions are generated, and the effect that near vision is like distant vision is achieved. Through an out-of-focus lens, the myopic defocus is formed at the surrounding area of a retina, so the increase of a visual axis is delayed, and purposes that intraocular ciliary muscles are trained, the ciliary muscles are relaxed and the increase of the myopia strength is effectively controlled are achieved.

The invention provides a cheating recognition method and device. The method comprises the steps of firstly obtaining a first examination video, wherein the first examination video is a video recordedfor an examination behavior of a first examinee; extracting a feature vector corresponding to each frame of image in the first examination video; wherein the feature vectors comprise information representing whether eyes are detected in the images or not and information obtained based on the positions of pupil centers of the eyes when the eyes are detected, and the feature vectors corresponding toall the images contained in the first examination video are combined to obtain a first feature vector sequence. Inputting the first feature vector sequence into a cheating recognition model, obtaining the output of the cheating recognition model, and determining that the first examinee cheating when the output of the cheating recognition model represents that the first examinee has a cheating behavior. The invention further provides a training method and device of the cheating recognition model, electronic equipment and a medium.

The invention discloses a camera having the pupil encryption recognition function. The camera comprises a recording unit for acquiring a target sound and converting the target sound into an electrical signal, a noise reduction unit for receiving the electrical signal uploaded by the recording unit and removing noises in the electrical signal, a central processing unit for receiving the electrical signal of whose the noises are removed and converting the electrical signal into a digital signal, and a storage unit for receiving the digital signal converted by the central processing unit for storage. The storage unit is connected with a pupil recognition unit: Recording is performed on recording content or the whole camera with pupils. When data needs to be played or transferred, subsequent operations only can be completed through pupil decryption. Bioactivity detection is supported by the pupil recognition unit. By increasing one pupil recognition unit, the confidentiality of a recording file stored by the camera can be effectively improved to avoid the original recording file from being tampered and stolen. Moreover, advantages of simple product structure, low cost and convenient mass production and production can be realized.