64 results about "Vergence" patented technology

A variable focus stereoscopic display system includes first and second lenses positioned between a viewer's eyes and a stereoscopic display that alters the distance to the focus plane of the viewer based on the vergence of the viewer's eyes while viewing the stereoscopic display.

In some embodiments, a display system comprising a head-mountable, augmented reality display is configured to perform a neurological analysis and to provide a perception aid based on an environmental trigger associated with the neurological condition. Performing the neurological analysis may include determining a reaction to a stimulus by receiving data from the one or more inwardly-directed sensors; and identifying a neurological condition associated with the reaction. In some embodiments, the perception aid may include a reminder, an alert, or virtual content that changes a property, e.g. a color, of a real object. The augmented reality display may be configured to display virtual content by outputting light with variable wavefront divergence, and to provide an accommodation-vergence mismatch of less than 0.5 diopters, including less than 0.25 diopters.

A refraction measuring instrument for measuring the refraction of an eye to be examined while the subject is viewing an external object in a more natural posture. A measuring light beam from a light source 21 is reflected from a mirror 25, shaped into a beam with a ring cross section, directed to a free curved surface prism 31 along an optical axis O2, reflected from a surface 31b and a beam splitting surface 31a, guided to an eye E along an optical axis O1 together with the visible light from outside the instrument, and form a ring pattern on the fundus F. The measurement beam reflected from the fundus F is received by a CCD 23 through the free curved surface prism 31 and a prism 22, and a ring pattern is imaged. A calculation control device 4 analyzes the imaged ring pattern and calculates the sphericity, the degree of astigmatism, and the astigmatic axis angle. For measurement, the subject A wears the refraction measuring instrument 1 on the head H through a wearing section 1a.

Aspects of the present invention relate to methods and systems for the see-through computer display systems with focus and/or vergence adjustment systems.

Aspects of the present invention relate to methods and systems for the see-through computer display systems with focus and/or vergence adjustment systems.

Aspects of the present invention relate to methods and systems for the see-through computer display systems with focus and/or vergence adjustment systems.

An augmented reality display system includes a pair of variable focus lens elements that sandwich a waveguide stack. One of the lens elements is positioned between the waveguide stack and a user's eye to correct for refractive errors in the focusing of light projected from the waveguide stack to that eye. The lens elements may also be configured to provide appropriate optical power to place displayed virtual content on a desired depth plane. The other lens element is between the ambient environment and the waveguide stack, and is configured to provide optical power to compensate for aberrations in the transmission of ambient light through the waveguide stack and the lens element closest to the eye. In addition, an eye-tracking system monitors the vergence of the user's eyes and automatically and continuously adjusts the optical powers of the pair of lens elements based on the determined vergence of those eyes.

The invention discloses an iris image blurring determination method and device. The method comprises steps of using radial symmetry transform to position pupils in an iris image; capturing an area of interest in the iris image, wherein the area of interest comprises a pupil boundary and pupils and irises at two sides of the pupil boundary; performing Gaussian fitting of the gradient value of the area of interest in the pupil radius direction, so as to obtain a blurring grade which is a divergence parameter of a Gaussian function obtained by fitting; and determining whether the blurring grade is larger than a blurring grade threshold or not, and if so, determining the iris image as a blurring one. Compared with the prior art, the method provided by the invention is higher in determination accuracy and faster in operation speed, and improves the iris identification performance.

One embodiment of the present invention sets forth technique for displaying an image based on eye vergence. The technique includes determining a first distance from one or more eyes of a user to a display location, and determining, based on eye gaze vectors associated with the eyes of the user, an eye convergence distance. The technique further includes causing the image to be displayed when the eye convergence distance is substantially the same as the first distance, or causing a display of the image to be terminated when the eye convergence distance is not substantially the same as the first distance.

The invention relates to strip mine's slope beside hill optimization. It belongs to strip mine's slope beside hill engineering technology field. Its steps are: build GIS data module; build side slope stabilization three dimension limit balance analysis module based GIS; realize arithmetic of three dimension module based on GIS and side slope optimization. Adopting GIS space analysis function, engineering geology, geography condition and hydrogeology information relative to side slope stabilization is presented into data structure, database design, space data analysis method etc. in GIS data model. Information relative to side slope of stratum, structure face, water table etc are presented through GIS data layer. All input data are converted in form of grid. The data are ground height, vergence direction, tile angle, ground water, ground floor, slip surface and physical mechanics parameters of space distribution. Each three dimension grid column unit can descript a kind of geography information relative to stabilization analysis of ground, stratum, slip surface etc. Adopting the invention, side slope can be optimized to reduce amount of ripping rock and production shell-exploit rate.

Various aspects of the subject technology relate to prediction of eye movements of a user of a head-mountable display device. Predictive foveated display systems and methods, using the predicted eye movements are also disclosed. Predictive variable focus display systems and methods using the predicted eye movements are also disclosed. Predicting eye movements may include predicting a future gaze location and/or predicting a future vergence plane for the user's eyes, based on the current motion of one or both of the user's eyes. The predicted gaze location may be used to pre-render a foveated display image frame with a high-resolution region at the predicted gaze location. The predicted vergence plane may be used to modify an image plane of a display assembly to mitigate or avoid a vergence/accommodation conflict for the user.

Augmented and virtual reality display systems increase viewer comfort by reducing viewer exposure to virtual content that causes undesirable accommodation-vergence mismatches (AVM). The display systems limit displaying content that exceeds an accommodation-vergence mismatch threshold, which may define a volume around the viewer. The volume may be subdivided into two or more zones, including an innermost loss-of-fusion zone (LoF) in which no content is displayed, and one or more outer AVM zones in which the displaying of content may be stopped, or clipped, under certain conditions. For example, content may be clipped if the viewer is verging within an AVM zone and if the content is displayed within the AVM zone for more than a threshold duration. A further possible condition for clipping content is that the user is verging on that content. In addition, the boundaries of the AVM zone and/or the acceptable amount of time that the content is displayed may vary depending upon the type of content being displayed, e.g., whether the content is user-locked content or in-world content.

The invention provides an optical display system, a display control device and an augmented reality device. The optical display system comprises at least two sets of imaging assemblies; each set of image assembly comprises a display source, a first semi-transmitting semi-reflecting lens and a second semi-transmitting semi-reflecting lens, wherein the display source is used for emitting imaging light according to the image of a visual angle corresponding to a monocular unit, the first semi-transmitting semi-reflecting lens is used for reflecting the imaging light emitted by the display source and transmitting ambient light into human eyes, and the second semi-transmitting semi-reflecting lens is used for reflecting the imaging light reflected by the first semi-transmitting semi-reflecting lens into the human eyes so as to display an image at a corresponding depth of field, and is used for transmitting ambient light to the first semi-transmitting semi-reflecting lens. According to the optical display system, the display control device and the augmented reality device of the invention, the at least two sets of imaging assemblies are adopted; the brightness of the imaging light emittedby the display source is adjusted, so that the depth of field of an imaging surface obtained by means of fitting on the basis of the brightness is corresponding to the depth of field of a stereoscopic image displayed by a binocular unit, and therefore, vergence-accommodation conflict is avoided, a user will not feel fatigue and discomfort, and the definition of the image is improved.

Various aspects of the subject technology relate to prediction of eye movements of a user of a head-mountable display device. Predictive foveated display systems and methods, using the predicted eye movements are also disclosed. Predictive variable focus display systems and methods using the predicted eye movements are also disclosed. Predicting eye movements may include predicting a future gaze location and/or predicting a future vergence plane for the user's eyes, based on the current motion of one or both of the user's eyes. The predicted gaze location may be used to pre-render a foveated display image frame with a high-resolution region at the predicted gaze location. The predicted vergence plane may be used to modify an image plane of a display assembly to mitigate or avoid a vergence/accommodation conflict for the user.

Introduced is an optical arrangement for varying an imaging ratio and/or a refractive power including at least one optical axis, having at least two optical elements, which can be pivoted into and/or pivoted to and/or switched into and/or switched to the optical path, which encompass in each case a refractive power and an optical axis and the optical axes of which can in each case be made to be substantially congruent with the optical axis of the arrangement or are substantially congruent with the optical axis of the arrangement. The optical path between the optical elements, which can be pivoted into and/or pivoted to and/or switched into and/or switched to, undergoes at least one change in direction and/or vergence.

A system and/or method for measuring a human ocular parameter comprises a human-wearable face shield which has an eye sensor, a head orientation sensor, and an electronic circuit, and a face shield. The eye sensor comprises a video camera that measures horizontal eye movement, vertical eye movement, pupillometry, and/or eyelid movement. The head orientation sensor measures pitch and/or yaw of the wearer's face. The electronic circuit is response to the eye sensor and the head orientation sensor and measures an ocular parameter such as vestibulo-ocular reflex, ocular saccades, pupillometry, pursuit tracking during visual pursuit, vergence, eye closure, focused position of the eyes, dynamic visual acuity, kinetic visual acuity, virtual retinal stability, retinal image stability, foveal fixation stability, or nystagmus.

The invention provides a display support mechanism for swimmingly rotating the display. The display support mechanism slantwise moves the display along vergence direction according to the base station, and comprises: axis; first bracket, which is rotationably located on the axis, and is fixed on one of back surface of the display and the base station; second bracket, which is rotationably located on the axis, and is fixed on the other of back surface of the display and the base station; friction force production unit, which produces friction force between the first bracket and the second bracket to keep the display on the preconcerted position of the base station; and falling torque elimination unit, which is located between the back surface of the display and the base station, and eliminates force forward along the axis of the display.

The invention discloses an image depth modulation module. The image depth modulation module comprises a plurality layers of electric control dimming plates arranged in a stacked mode, wherein each layer of electric control dimming plates is composed of a plurality of electric control dimming units; and each electric control dimming unit is provided with an independent switch, and each electric control dimming unit can be regulated to be in a transmission state or a scattering state. Meanwhile, the invention also discloses a display module applying the image depth modulation module and near-eyedisplay equipment; and an image is loaded with depth of field through a physical structure, so that pixel-level or quasi-pixel-level depth-of-field adjustment is realized, a visual vergence-accommodation conflict effect can be solved, the image observed by human eyes better conforms to the focusing habit of the human eyes, and the depth arrangement of the display image is closer to the depth lawof the real light field.

The invention provides methods for designing contact lenses that takes into account pupil size and vergence. The lenses of the invention augment the eye's accommodative gain and take advantage of the eye's residual accommodation amplitude.