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.

An image display system includes a body, a first correction unit, and a second correction unit. The body houses a display unit to display an image and projects a virtual image, corresponding to the image, onto a target space using outgoing light of the display unit. The first correction unit corrects for distortion of the image. The second correction unit corrects a display location of the image on the display unit in accordance with an orientation signal representing a change in orientation of the body. Each of divisional areas of a display screen of the display unit is assigned with a distortion correction parameter for correcting for the distortion of the virtual image. The first correction unit applies distortion correction to each of the image regions of the image on the display screen based on a distortion correction parameter assigned to a divisional area where the image region is displayed.

In an example implementation, a head-mounted display (HMD) device includes a display, a variable lens receptacle to receive an interchangeable lens, a sensor to retrieve lens information from the lens, and a controller to obtain images that are predistorted according to the lens information, wherein the controller is to display the predistorted images on the display.

Systems and methods for providing a head-up display using a holographic element formed on a visor of a wearable element (e.g., a helmet) are disclosed. Light projectors along with corresponding optics are positioned on both sides of a user's head within the wearable element. Light from a light projector is directed towards the holographic element to reflect towards the eye on the opposite side of the head from the light projector. With light reflecting from both light projectors, images are perceived by the user is being positioned on a virtual screen where the virtual screen is positioned outside the wearable element. Images on the virtual screen are displayed stereoscopically and with a large field of view for the user.

The disclosure relates to augmented reality devices, and more particularly, to augmented reality glasses and methods for operating the same. An augmented reality display device is provided. The augmented reality display device includes a projection system, an optical compensator positioned after the projection system, and a flexible waveguide. The flexible waveguide can change its curvature and comprises an input diffraction grating and an output diffraction grating. The optical compensator is configured to introduce pre-distortion to the image and optically zoom the image received from the projection system, the pre-distortion in the image and optical zoom of the image being opposite to those introduced by the flexible waveguide to the undistorted image in accordance with chosen radius of the flexible waveguide. Flexible diffraction grating distorts the pre-distorted image. The output diffraction grating outputs undistorted image to a user's eyes.

A compact projector for use in a head-mounted display device consists of an illumination section, a relay section, and a numerical aperture expander (NAE). The illumination section includes one or more illumination sources, a scanner, and a focusing lens which converges light onto an image plane. The NAE receives light from the illumination section, expands the average numerical aperture of the light, and transmits the light to the relay section. The relay section includes optical elements which collimate light from the image plane onto an exit pupil. The projector may also be fitted with lateral-axis and/or vertical-axis stops which prevent stray light from passing through the exit pupil.

A tiled head-mounted display device, comprising: an optical component including a plurality of prisms with free-form surfaces, each prism being a wedge prism comprising a first optical surface, a second optical surface and a third optical surface; and a display component including a plurality of micro-displays, wherein the number of the micro-displays and the number of the prisms with free-form surfaces is identical. The tiled head-mounted display device according to the present invention is compact and light, provides wide field of view and high resolution, especially for the optical tiling head-mounted display device, the exit pupil planes of each display channels are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as the single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion. The tiled head-mounted display device according to the present invention can be readily applicable to augmented environments applications by simply adding an auxiliary free-form lens behind the free-form prism.

Electronic apparatuses with suppressed deterioration image quality and reduced bezel width are disclosed. In one example, an electronic apparatus includes a display unit, imaging optical systems, and an image acquisition unit. The display unit has a displayable region that includes display optical systems disposed in an array in a first direction and a second direction intersecting the first direction. The imaging optical systems are disposed on a side opposite to a display surface of the display unit and overlapped with the displayable region in a third direction intersecting the first direction and the second direction, and include first and second imaging optical systems with different coordinates in at least one of the first direction and the second direction. The image acquisition unit acquires image data on the basis of information acquired by the first imaging optical system and the second imaging optical system.

A holographic display apparatus including a freeform curved surface and an operating method of the holographic display apparatus are provided. The holographic display apparatus includes: an image generator configured to generate a hologram image by modulating light; an optical system including a freeform curved surface for forming the hologram image generated by the image generator in a predetermined depth; and a processor configured to generate a computer-generated hologram (CGH) based on three-dimensional image information by using a phase map including information about an optical aberration with respect to the freeform curved surface and to control the image generator to modulate the light based on the CGH.

A HUD calibration system is provided and includes a HUD, a reticle reference object, a target, and a control module. The HUD displays a virtual image including a first center feature and first features. The reticle reference object is physically fixed to a windshield of a vehicle. The target is physically disposed forward of the vehicle and includes a second center feature and second features. The control module: controls the HUD to display the virtual image superimposed over the target; perform a boresighting process to align a center of a cross-hair of the reticle reference object with the first and second center features and generate first reference values; perform an undistortion calibration process to rotate and undistort the virtual image relative to the target and generate second reference values; and adjust operation of the HUD based on the first and second reference values.