Abstract: An electronic device and method are disclosed. The electronic device includes a first camera configured to capture a frontal external environment of the electronic device, a second camera oriented opposite to the first camera and configured to capture gaze directions of a user's left eye and right eye, a first display panel corresponding to the left eye, a second display panel corresponding to the right eye, a memory, and a processor that implements the method, including: identifying, using the second camera, a dominant eye and a non-dominant eye among the left eye and right eye, identifying a dominant display panel from among the first and second display panels corresponding to the dominant eye, and a non-dominant display panel from among the first and second display panels corresponding to the non-dominant eye, and changing settings of the dominant display panel to be different from settings of the non-dominant display panel.

Abstract: An electronic device and method are disclosed. The electronic device includes a first camera configured to capture a frontal external environment of the electronic device, a second camera oriented opposite to the first camera and configured to capture gaze directions of a user's left eye and right eye, a first display panel corresponding to the left eye, a second display panel corresponding to the right eye, a memory, and a processor that implements the method, including: identifying, using the second camera, a dominant eye and a non-dominant eye among the left eye and right eye, identifying a dominant display panel from among the first and second display panels corresponding to the dominant eye, and a non-dominant display panel from among the first and second display panels corresponding to the non-dominant eye, and changing settings of the dominant display panel to be different from settings of the non-dominant display panel.

Abstract: A display system is configured to direct a plurality of parallactically-disparate intra-pupil images into a viewer's eye. The parallactically-disparate intra-pupil images provide different parallax views of a virtual object, and impinge on the pupil from different angles. In the aggregate, the wavefronts of light forming the images approximate a continuous divergent wavefront and provide selectable accommodation cues for the user, depending on the amount of parallax disparity between the intra-pupil images. The amount of parallax disparity may be selected using an array of shutters that selectively regulate the entry of image light into an eye. Each opened shutter in the array provides a different intra-pupil image, and the locations of the open shutters provide the desired amount of parallax disparity between the images. In some other embodiments, the images may be formed by an emissive micro-display.

Abstract: A microscopy method for three-dimensionally imaging an object, including imaging the object along a beam path into a first image on a first image plane. A first microlens array is arranged on the first image plane, and a second microlens array with the same pitch is arranged downstream of the first array. The two arrays laterally segment the first image and image same into a second image in which the segments are spaced apart and separated by gaps. On a pupil plane downstream of the microlens array, a provided phase mask generates a spot for each segment of the second image according to a pixel diffusion function. A detector detects the shape and structure of the spot, and a controller ascertains a lateral intensity distribution and depth specification from the shape and/or structure of the spot for each segment and generates a depth-resolved image of the object therefrom.

Abstract: Methods and apparatus providing a head-mounted display to be worn by the user and presenting a video to the user through the head-mounted display; measuring outside world information via an outside world measurement section of the head mounted display; detecting, via a notification information detection section, whether or not the information measured by the outside world measurement section contains any notification information to be notified to the user, including that the notification information detection section detects at least one reference position, which is set by the user as notification information; and notifying the user, via a notification section, when the notification information detection section detects notification information by way of displaying a video of the at least one reference position to the user in the head-mounted display.

Abstract: An eyepiece waveguide for an augmented reality display system may include an optically transmissive substrate, an input coupling grating (ICG) region, a multi-directional pupil expander (MPE) region, and an exit pupil expander (EPE) region. The ICG region may receive an input beam of light and couple the input beam into the substrate as a guided beam. The MPE region may include a plurality of diffractive features which exhibit periodicity along at least a first axis of periodicity and a second axis of periodicity. The MPE region may be positioned to receive the guided beam from the ICG region and to diffract it in a plurality of directions to create a plurality of diffracted beams. The EPE region may be positioned to receive one or more of the diffracted beams from the MPE region and to out couple them from the optically transmissive substrate as output beams.

Abstract: Medical observation apparatus (1) and method for observing an object or patient (67) in an operation area (21). Solutions of the art (3, 5) do not allow displaying further information, are expensive, bulky and non-intuitive.

Abstract: A near eye display (NED) includes an eye tracking system and a steering element. The eye tracking system tracks the location of a very small eyebox that is approximately the size of a user's pupil or smaller and provides this information to the steering element (e.g., MEMS, plurality of sources, liquid crystal prism, etc.). The very small eyebox provides for a very wide field of view and is optically efficient. The steering element adjusts the direction of light output (i.e., the exit pupil) from the NED such that it is directed toward the tracked location (i.e., a relatively small eyebox).

Abstract: An autostereoscopic display includes a plurality of projectors and a screen. Each of the projectors is configured to provide a corresponding lamp image unit. Each of the lamp image units includes array of lamp images actuated in time sequence and projecting to different directions. The screen has an image plane and includes a first micro-lens array and a second micro-lens array. The first micro-lens array is configured to guide the lamp image units to the image plane such that the lamp image units are connected end to end and arranged in a ring on the image plane as a lamp image set. The second micro-lens array is located corresponding to the first micro-lens array and configured to magnify the projection angles of the lamp image units in the lamp image set and project the lamp image set to an observing surface.

Abstract: A method and a device for fine adjustment of the reconstruction plane of a digital combination image from individual images of a digital radiology system. The device includes an interface for providing individual images of an object. The individual images have overlapping regions with one another. A distance controller, with which the distance A of the individual images can be changed. A processing unit calculates a current combination image from the individual images. The individual images are each shifted by the distance A in relation to one another. A display unit displays the current combination image from the individual images. There is also described an image evaluation system and/or digital radiology system which includes the device.

Abstract: A retractable virtual reality device includes a rear cover, a front cover, a first restraining component, a second restraining component, and a display module. The front cover is movably combined with the rear cover. The first restraining component is fixed on the front cover. The second restraining component is movably disposed on the rear cover and for restraining the first restraining component. The display module includes a sleeve, a lens, and a display. The sleeve is fixed on the rear cover. The lens is disposed on a side of the sleeve. The display is disposed on the front cover and movably combined with the other side of the sleeve. By cooperation of the first restraining component and the second restraining component, the display and the front cover are movable relative to the lens and the rear cover, which reduces an overall size of the virtual reality device for easy carry.

Abstract: Head-mounted displays (100) are disclosed which include a frame (107), an image display system (110) supported by the frame (107), and a Fresnel lens system (115) supported by the frame (107). The HMD (100) can employ a reflective optical surface, e.g., a free-space, ultra-wide angle, reflective optical surface (a FS/UWA/RO surface) (120), supported by the frame (107), with the Fresnel lens system (115) being located between the image display system (110) and the reflective optical surface (120). The Fresnel lens system (115) can include at least one curved Fresnel lens element (820). Fresnel lens elements (30) for use in HMDs are also disclosed which have facets (31) separated by edges (32) which lie along radial lines (33) which during use of the HMD pass through a center of rotation (34) of a nominal user's eye (35) or through the center of the eye's lens (36) or are normal to the surface of the eye's cornea.

Abstract: A method of generating a virtual image, including directing a light beam to a first side of an eyepiece, including transmitting the light beam into a first waveguide of the eyepiece; deflecting, by first diffractive elements of the first waveguide, a first portion of the light beam towards a second waveguide of the eyepiece, the first portion of the light beam associated with a first phase of light; deflecting, by protrusions on the first side of the eyepiece, a second portion of the light beam towards the second waveguide, the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by second diffractive elements of the second waveguide, some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image that is based on the first and second phases.

Abstract: Exemplary embodiments of the present invention provide a display panel and a display driving method thereof, a display driving device and a display device. The display panel comprises a pixel array and a grating array blocking in the light outgoing direction of the pixel array, wherein the pixel array is periodically arranged in order of a first color sub-pixel column, a second color sub-pixel column and a third color sub-pixel column, each sub-pixel column comprising a plurality of rectangular sub-pixels; and the pixel array comprises four view pixel groups for displaying four views.

Abstract: A first optic adjusts the focus of environment content in independent regions, and delivers the environment content to a see-through display. The display adds display content, and delivers environment and display content to a second optic. The second optic adjusts the focus of the environment and display contents in independent regions, and delivers the environment and display contents to a viewing point. The focuses of the environment and display contents are adjustable independently of one another and in different regions. Environment content may be similar in focus before and after passing through the first and second optics. Display content may be similar in focus to environment content after the display content passes through the second optic. A modifier also may darken, change opacity, or otherwise modify the environment content, independently in different regions; the display also may brighten, enlarge, or otherwise alter the display content, independently in different regions.

Abstract: An autostereoscopic three-dimensional (3D) display apparatus is provided. The autostereoscopic 3D display apparatus includes an image display unit configured to display a 3D image including a 3D virtual object or a 3D image including a 3D virtual object and text; and an optical unit configured to reflect or transmit the displayed 3D image from the image display unit toward a viewer, transmit an image of a real object facing the viewer, and display a combination of the 3D image and the image of the real object to the viewer.

Abstract: A three-dimensional viewing apparatus and video system, having a viewer assembly with first and second wedge prisms. Each of the first and second wedge prisms has an angled wall, a wall, a wide edge, a narrow edge, and first and second side edges to view over-under 3D videos/images shown on a display. The display is a computer display. The computer has computer software to generate the over-under 3D videos/images. The over-under 3D videos/images have a predetermined distance between them and the over-under 3D videos/images are not aligned vertically. A divider assembly is positioned between the first and second wedge prisms.

Abstract: A viewer for viewing an object under magnification, the viewer comprising: an objective lens for producing an image of an object located at an object plane and having a radial extent defined by an aperture stop; a partially-transmissive reflector for allowing transmission of light therethrough from the objective lens to a mirror arrangement and providing for reflection of light which is returned thereto from the mirror arrangement; a mirror arrangement which receives a light component from the partially-transmissive reflector, and is located such that a focussed image of the object is produced at the mirror arrangement and light received by the mirror arrangement is reflected back to the partially-transmissive reflector and relayed to produce an image of the object; a viewing lens arrangement for producing an optical image of the object which is viewable by an observer at an exit pupil at a viewing plane; wherein the objective lens has a beam path angle (a) as defined by a distance from the object plane to th

Abstract: In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), an in-coupling DOE couples light into the waveguide, an intermediate DOE provides exit pupil expansion in a first direction, and an out-coupling DOE provides pupil expansion in a second direction and couples light out of the waveguide. The intermediate DOE is configured with a crossed grating which is a three-dimensional microstructure that is periodic in two directions. The crossed grating provides multiple optical paths to a given point in the DOE in which differences in optical path lengths are larger than the coherence length. The crossed grating in the intermediate DOE may provide increased display uniformity in the optical display system by reducing the “banding” resulting from optical interference that is manifested as dark stripes in the display. The crossed grating can further enable the optical display system to be more tolerant to manufacturing variations.

Abstract: A head mounted display device includes a light source that emits a high coherence light beam, a beam expansion/diverging element that expands the light beam emitted by the light source, and a beam converging element that converges the expanded light beam into a viewing zone. The light beam from the beam converging element is incident onto a spatial light modulator (SLM), and the SLM is configured to add a phase pattern and/or an amplitude pattern to the light beam to generate a virtual image that is visible to a user wearing the head mounted display device. The light converging element creates a beam or scanning beam axis that converges towards the eye, which enables a large field of view for a virtual or holographic image to be displayed.

Abstract: A wearable display system has a first lens sub-assembly defining a first optical path and a second lens sub-assembly defining a second optical path. The first and second lens sub-assemblies are disposed in a frame in respective first and second lens-holding sub-assemblies. The frame also has a device holder configured to maintain a display of a device in the first and second optical paths. The display can be maintained within a predetermined range of distances and angles with respect to the first and second lens sub-assemblies. This arrangement permits the display, such as, for example, a smartphone display, independently to provide a specific image to each eye of a user. For example, different images can be independently provided to each eye from different portions of a common display, thereby enabling the user to perceive a three-dimensional image.

Abstract: In one aspect, a computer-implemented method for efficiently rendering and displaying multiple images on an electronic device having an automultiscopic display may generally include detecting, with the electronic device, a position of at least one eye relative to the automultiscopic display. The automultiscopic display may include an array of multipixels, with each multipixel including a plurality of sub-multipixels. In addition, the method may include rendering a viewpoint-specific image for each detected eye position and selectively coloring at least one sub-multipixel within one or more of the multipixels such that colors associated with the rendered viewpoint-specific image are only displayed within a multipixel display zone defined for each of the one or more multipixels with respect to each detected eye position.

Abstract: A single-lens two-channel reflector provides the capability to switch between two-dimensional and three-dimensional imaging. The reflector includes laterally displaceable outward reflectors and displaceable inward reflectors that can simultaneously provide left and right images of a scene to an imager, and controllers for controlling relative distance between the outward and the inward reflectors, and for controlling deflection angle of the inward reflectors, so as to enable the adjustment of disparity and convergence angle.

Abstract: A device, system, and method of assistance for visually impaired users. The system comprises a plurality of video cameras, often head mounted, computer processors and associated support devices and algorithms configured for computer vision, and a user worn haptic band comprising a plurality (two or more) of distantly spaced haptic transducers. This haptic band is worn such that user's hands are free for other tasks. The system uses its video camera, depth processing algorithms, and object recognition algorithms (hardware and/or software based) to identify a limited number of navigationally important objects. The spatial locations of each object deemed important is output to the user by varying output to the haptic transducers accordingly. The system is configured to identify and report objects as generic objects, identified objects, and potential obstacle objects. The system can also optionally provide audio information pertaining to these objects as well.

Abstract: A 3D display incorporates laser or saturated light sources to produce 3D images. The images may be produced on an LCD display or projector. Ambient light is filtered out through viewing glasses having passbands corresponding to the light sources. The light sources may include 2 sets of primary lights (one for each of 2 3D viewing channels) and a third set of primaries common to both channels. The display may be configured for a 2D display mode and a bandpass filter may be placed on a display surface to reduce reflections. The display may be a locally modulated or constant backlit LCD display.

Abstract: A method for adapting 3D video content to a display under different viewing conditions is disclosed. The method has the steps of: retrieving a stereoscopic image pair; obtaining a maximum disparity value for the stereoscopic image pair; determining a largest allowable shift for the stereoscopic image pair using the obtained maximum disparity value; calculating an actual shift for a left image and a right image of the stereoscopic image pair using the determined largest allowable shift; and shifting the left image and the right image in accordance with the calculated actual shift.

Abstract: A telepresence system includes a projector for generating an image, a projection screen for reviewing the image generated by the projector and generating a reflected image and a foil for reviewing the reflected image generated by the projection screen. The foil generates and directs partially reflected image toward an audience, the partially reflected image being perceived by the audience as a virtual image or hologram located on a viewing stage. Additionally, the system incorporates a camera for filming an individual through the foil, the camera being located on a camera side of the foil and positioned adjacent to the viewing stage, the individual being located on an individual side of the foil and positioned on a filming stage.

Abstract: This document relates to a method of removing jagging of a stereoscopic image and a stereoscopic image display device using the same. The method comprises: detecting left edges and right edges by analyzing left-eye image data and right-eye image data; replacing the left-eye image data on a kth line with the left-eye image data on a (k?1)th line in response to a first absolute value of a difference between a number of the left edges on the (k?1)th line and the kth line being equal to or more than a edge number threshold value; and replacing the right-eye image data on the kth line with the right-eye image data on the (k?1)th line in response to a second absolute value of a difference between a number of the right-eye edge data on the (k?1)th line and the kth line being equal to or more than the edge number threshold value.

Abstract: The present disclosure relates to an apparatus for displaying a stereoscopic image, and there is provided an image display method, and the method may include acquiring information on a user's face; determining whether to allow a stereoscopic image based on the face information; and displaying an image based on a result of the determination as to whether to allow a stereoscopic image. Hence, according to the present invention, a person disqualified for viewing a stereoscopic image may be prevented from viewing TV in a stereoscopic image mode.

Abstract: A display method of a two-dimensional and naked eye type stereoscopic switchable display device is disclosed. The two-dimensional and naked eye type stereoscopic switchable display device includes a two-dimensional and naked eye type stereoscopic switchable display module, at least one detection device and an indicator device. The two-dimensional and naked eye type stereoscopic switchable display module provides a plurality of stereoscopic image regions in a naked eye type stereoscopic display mode. Then, detect a viewer's position with the detection device. And, determine whether or not the viewer's position is in the stereoscopic image regions with the two-dimensional and naked eye type stereoscopic switchable display device. When the viewer locates in the stereoscopic image regions, the indicator device emits a first color light. When the viewer locates outside of the stereoscopic image regions, the indicator device emits a second color light.

Abstract: A display device includes a display panel and a shutter panel that is provided on the viewer side of the display panel and includes a first liquid crystal element and a second liquid crystal element adjacent to each other. In a first display state, a first light-shielding region and a first light-transmitting region are formed in the shutter panel by the first liquid crystal element, and light from the display panel is emitted through the first light-transmitting region. In a second display state, a second light-shielding region larger than the first light-shielding region and a second light-transmitting region smaller than the first light-transmitting region are formed in the shutter panel by the first liquid crystal element and the second liquid crystal element, and light from the display panel is emitted through the second light-transmitting region.

Abstract: An autostereoscopic display apparatus includes a substrate, a plurality of sub-pixels, a plurality of concave lens structures, a middle layer and a lenticular layer. The sub-pixels are disposed on the substrate, and each sub-pixel includes a light permeable area and at least one light masking area. The concave lens structures are disposed on the sub-pixels and on the optical paths of the light permeable areas. The middle layer is disposed on the concave lens structures, wherein the concave lens structures is used to expand the illumination distribution of the light from the light permeable areas of the sub-pixels, so as to form a plurality of virtual sub-pixel patterns. The projections of virtual sub-pixel patterns respectively projected to the sub-pixels cover the light masking areas of the sub-pixels. The focal point of the lenticular layer falls on the virtual sub-pixel patterns.

Abstract: A stereoscopic image viewing device to be attached for stereoscopic image viewing to eyeglasses; which includes: a pair of light shutters for right and left eyes; a driver circuit for the light shutters; a power source unit for driving the light shutters; a bridge for supporting the light shutters at their inside edges; a binding portion for removably binding the stereoscopic image viewing device to the eyeglasses; and a support for supporting the driver circuit and the power source unit. The power source unit includes a secondary battery. The binding portion and the support are integrally formed with the bridge. The stereoscopic image viewing device has a center of gravity positioned in the bridge.

Abstract: A 3D display device that includes: a first optical section of focal distance f1 provided with a group of small lenses arrayed along a specific direction; and a second optical section of focal distance f2 that converges N beams of parallel light that are emitted from the first optical section and hit the individual small lenses by converging so as to offset the N beams from an optical axis. A distance d1 between the first optical section and the second optical section satisfies f2?f1?d1?f2 and a viewing distance d2 from the second optical section satisfies d2?f2.

Abstract: A stereoscopic image viewing device to be attached for stereoscopic image viewing to eyeglasses, which includes: a pair of light shutters for right and left eyes; a driver circuit for the light shutters; a power source unit for driving the light shutters; a support for supporting the light shutters; and a first binding portion for removably binding the stereoscopic image viewing device to the eyeglasses, the first binding portion being integrally formed with the support. The power source unit and the driver circuit are connected to the support by a flexible connecting member without being fixed to the light shutters.

Abstract: A two-parallel-channel reflector (TPCR) with focal length and disparity control is provided. The TPCR is connected to an imaging device, so that an image of a scene is captured to generate a stereoscopic image. The TPCR has two parallel channels that allow the imaging device to generate a left side view image and a right side view image of the shot scene synchronously. Each parallel channel includes an outward reflecting unit and an inward reflecting unit, which are designed to ensure that light rays in the parallel channels are reflected in a collimated and parallel manner. During imaging, a position and an angle of the outward reflecting unit can be adjusted to fulfill the function of controlling the disparity and the focal length.

Abstract: A polarization separation device includes a first end surface on which incident light is incident, a polarization separation surface that reflects an s-polarized light component and transmits a p-polarized light component, a second end surface that is arranged to be opposed to the first end surface, converts the p-polarized light component transmitted through the polarization separation surface to the s-polarized light component, and reflects the converted light component to an optical axis direction which is the same as the incident light, a third end surface from which the s-polarized light component reflected by the polarization separation surface without transmitting through the polarization separation surface is output, and a fourth end surface that is arranged to be opposed to the third end surface and from which the s-polarized light component reflected by the second end surface and the polarization separation surface is output.

Abstract: A 3-d stereoscopic viewing lens which the retarder film is made of a PVA film. A 3-D stereoscopic viewing lens having a linear polarized film, one or more lens substrate layers, and an epoxy layer. A process of making retarder film including mounting a PVA film to an assembly line; wetting, cleaning, and washing the PVA film through said assembly line; softening, expanding and stretching the PVA film's x-axis through said assembly line; adding gap filling agent to the PVA film; stretching the PVA film's y-axis through a width frame holder and as a result transforming the PVA film into a retarder film.

Abstract: A head-up display device includes an image module, a substrate, and an optical film. The image module has an emitting source, wherein the emitting source transmits at least one image. The substrate is disposed corresponding to the image module. The optical film is disposed on the substrate and includes at least one transmission layer, wherein each transmission layer has a plurality of transmitting column structures obliquely arranged side by side, and a longitudinal direction of the transmitting column structure has a tilt angle with respect to a normal of the substrate. The at least one image is transmitted to the optical film, and the obliquely disposed transmitting column structures cause the at least one image to scatter on the optical film.

Abstract: A display device is configured so that color pixels of a plurality of colors are formed in a longitudinal stripe shape. A lenticular lens is arranged on the display device, in which a periodical direction thereof is inclined with respect to the horizontal direction of the display device. A display position adjustment unit shifts a projected image data in predetermined pixel shift amounts of the respective horizontal and vertical directions including the pixel shift amount of 0, in a unit of one pixel defined by each of the color pixels of the plurality of colors in the horizontal direction of the display device and in a unit of each of the color pixels in the vertical direction thereof. A driving unit drives the display device to display the projected image data thereon.

Abstract: Disclosed herein are methods and systems for creating stereoscopic images. A left-eye view image for a stereoscopic image and an imperfect right-eye view image may be received. A smooth optical flow may be generated from the received image representing the left-eye view to the imperfect image representing the right-eye view to produce a first candidate right-eye view. Objects are identified in the imperfect image, and merged into the first candidate right-eye view image to create a right-eye view image. A stereoscopic image is created from the left-eye view image and right-eye view image.

Abstract: An augmented reality electronic head gear is disclosed. The head gear includes an electronic device compartment configured to receive and support an electronic device such as an iPhone®. The head gear further includes a reflective surface configured to reflect the display of the electronic device to the eyes of a user. The head set is configured to rest upon a user's head, keeping the user's hands free and able to interact with the surrounding environment, while the user's eyes view real-time images of the surrounding environment being augmented.

Abstract: 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.

Abstract: A monitoring system for generating a three-dimensional (3D) image, the system including: a plurality of monitoring cameras which are arranged to capture respective images of an area such that a portion of an angle of view of one monitoring camera overlaps a portion of an angle of view of another monitoring camera; and a controller which crops a plurality of overlapped images, each of which is an image of the overlapped portion, from among the respective images captured by the plurality of monitoring cameras, and generates a 3D image by adding the overlapped images.

Abstract: A method for forming a stereoscopic image having a left-eye image and a right-eye image repeats the steps of directing a line of the left-eye image as incident light toward a scanning element while directing a line of the right-eye image as incident light toward the scanning element, and moving the scanning element into position for directing incident light toward a portion of a display surface.

Abstract: An auto-stereoscopic display and three-dimensional imaging double-sided mirror array being low-loss and nearly dispersion-less. The double-sided mirror array for auto-stereoscopic display and three-dimensional (3D) imaging comprises a display panel, a slab and an array. The display panel comprises multiple display pixels. The slab is in close contact with the display panel. The array comprises at least two vertical mirror strips, at least one vertical blinds and a spacing. Each vertical mirror strip is inserted into the slab. Each vertical blind is shorter than the vertical mirror strip and is inserted into the slab between two vertical mirror strips. The spacing is between the vertical mirror strip and the vertical blind and is chosen to match the width of the display pixels exactly.

Abstract: Disclosed are a 3D image system and 3D glasses. The 3D image system includes a liquid crystal display monitor and the 3D glasses. The liquid crystal display monitor includes a backlight module and a ½? wave plate. The ½? wave plate converts lights from by the backlight module into linear polarized lights. The 3D glasses includes a first ¼? wave plate for receiving and converting the linear polarized lights from the ½? wave plate into circular polarized lights, a second ¼? wave plate for converting the circular polarized lights from the first ¼? wave plate into linear polarized lights, and a second ¼? wave plate for filtering the linear polarized lights from the second ¼? wave plate and transmitting the filtered lights to left and right eyes correspondingly. The present invention saves the cost and decreases the maintaining expense.

Abstract: The invention relates to a stereovision optometry apparatus comprising: a 3D display unit for displaying 3D image; a reference 2D display unit for displaying reference 2D image; an eyepiece in opposite side of the 2D display unit configured to view the images; a reflective mirror in opposite side of the 3D display unit configured to move toward and away from the 3D display unit; and a half mirror arranged between the 3D display and the reflective mirror and disposed at a point where propagation paths of the 2D image and the 3D image intersect; wherein the 2D image penetrates through the half mirror to reach the eyepiece; wherein the 3D image penetrates the half mirror to be reflected on the reflective mirror and then the reflected image is reflected on the half mirror to reach the eyepiece.

Abstract: A heads-up display associated with a user manipulated object in a gaming environment, particularly a racing game. According to one aspect the heads-up display may reduce the distance a user's eye travels between a focal area and the heads-up display.

Abstract: A stereo comparator configured for use with a stereo endoscope for adjusting and aligning an optical assembly of the stereo endoscope, for example, in connection with the repair of the endoscope. The comparator includes a housing containing a plurality of optical components, namely, a first deflecting component, a second deflecting component, a third deflecting component and a beam splitter. The optical components are arranged so that the first deflecting component deflects a first beam from a right image channel of a stereo endoscope to the beam splitter, the second deflecting component deflects a second beam from a left image channel of the stereo endoscope to the third deflecting component, the third deflecting component deflects the second beam to the beam splitter and the beam splitter combines the first beam with the second beam to form a first combined beam that extends along an optical axis of the stereo endoscope.