An illumination device has a coherent light source that emits coherent light beam, and an optical device that diffuses the coherent light beam, wherein the optical device comprises a first diffusion region that diffuses the coherent light beam to illuminate a first area, and a second diffusion region that diffuses the coherent light beam to display predetermined information in a second area.

Various embodiments set forth optical patterning systems. Each pixel of the optical patterning systems includes an amplitude-modulating cell that is in line with a phase-modulating cell. The amplitude-modulating cell includes a liquid crystal and a drive method for modulating at least the amplitude of a wavefront of light that passes through the amplitude-modulating cell. The phase-modulating cell includes a liquid crystal and a drive method for modulating at least the phase of a wavefront of light that passes through the phase-modulating cell. In some embodiments, the amplitude-modulating cell shares a common ground with the phase-modulating cell. The amplitude-modulating cell and the phase-modulating cell can be used to independently control the amplitude change and phase delay imparted by the pixel, enabling complex wavefront modulation.

A method for learned hardware-in-the-loop phase retrieval for holographic near-eye displays includes generating simulated ideal output images of a holographic display. The method further includes capturing real output images of the holographic display. The method further includes learning a mapping between the simulated ideal output images and the real output images. The method further includes using the learned mapping to solve for an aberration compensating hologram phase and using the aberration compensating hologram phase to adjust a phase pattern of a spatial light modulator of the holographic display.

A system or method for augmenting a lightfield image can include receiving a plurality of images of a subject, overlaying augmentation content on the images, optionally obscuring portions of the augmentation content based on the perspective of the image and the subject, and displaying the aligned images and the augmentation content at a holographic display.

Systems and methods for surgical imaging are disclosed herein. A head-mountable device (HMD) can include a display configured to provide an image within a field of view of an environment of the HIVID. At least one fiducial marker can be arranged on a surgical patient. At least one sensor can be configured to track a position of the at least one fiducial marker. Three-dimensional image information indicative of one or more internal features of the patient is provided. Based on information from the at least one sensor, a position of the surgical patient can be determined. Based on the determined position of the surgical patient, the HIVID can display at least a portion of the three-dimensional image information superimposed on at least a portion of the surgical patient within the field of view.

A projection apparatus, adapted to project a virtual image to a projection target, and comprising a light source module, a light modulator, an optical lens and an optical film is provided. The light source module provides a light beam. The light modulator adjusts a transmission direction of the light beam. The light modulator modulates the light beam according to an input signal to generate the virtual image. The optical lens has a front view direction on a reference plane. The projection target receives an environment beam in the front view direction to form an environment image. The optical film projects the virtual image to the projection target along a projection direction. The front view direction and the projection direction have an included angle on the reference plane. Moreover, an image projection method is also provided.

A display device includes a light source, a waveguide element, a liquid crystal coupler, a first holographic optical element and a second holographic optical element. The light source is configured to emit light. The waveguide element is located above the light source. The liquid crystal coupler is located between the waveguide element and the light source. The first holographic optical element is located on a top surface of the waveguide element, in which the liquid crystal coupler is configured to change an incident angle that the light emits to the first holographic optical element. The second holographic optical element is located on the top surface of the waveguide element, and there is a first distance in a horizontal direction between the first holographic optical element and the second holographic optical element, in which the second holographic optical element is configured to diffract the light to the waveguide element below.

The present invention provides a light-guiding plate which is applicable to incident rays over a wide ray angular range and wide wavelength rage, and is able to suppress a decrease in optical efficiency. A light-guiding plate 200 having a light diffracting portion 1200 for diffracting incident light by a multiple-recorded hologram is configured such that, in the light diffracting portion, when light 1210 of a single wavelength having a certain angular range is incident, at least two or more outgoing rays 1220 are discretely emitted with a first angular space θs, and the emitted rays each have a second angular range θa, and the first angular space θs is equal to or larger than the second angular range θa.

A mixed reality accommodation system and related methods are provided. In one example, a head-mounted display device includes a plurality of sensors and a display system for presenting holographic objects. A mixed reality safety program is configured to receive a holographic object and associated content provider ID from a source. The program assigns a trust level to the object based on the content provider ID. If the trust level is less than a threshold, the object is displayed according to a first set of safety rules that provide a protective level of display restrictions. If the trust level is greater than or equal to the threshold, the object is displayed according to a second set of safety rules that provide a permissive level of display restrictions that are less than the protective level of display restrictions.

There is provided a method of projection using an optical element (502,602) having spatially variant optical power. The method comprises combining Fourier domain data representative of a 2D image with Fourier domain data having a first lensing effect (604a) to produce first holographic data. Light is spatially modulated (504,603a) with the first holographic data to form a first spatially modulated light beam. The first spatially modulated light beam is redirected using the optical element (502,602) by illuminating a first region (607) of the optical element (602) with the first spatially modulated beam. The first lensing effect (604a) compensates for the optical power of the optical element in the first region (607). Advantageous embodiments relate to a head-up display for a vehicle using the vehicle windscreen (502,602) as an optical element to redirect light to the viewer (505,609).