The present invention relates to a method, system and device for transmitting information from an optical communication transmitter to a receiving station via a laser beam and for alignment of said laser beam emitted from said optical communication transmitter with said receiving station, wherein: said optical communication transmitter is displaced relative to said receiving station and comprises a laser, a radio receiver, a microprocessor and a liquid crystal on silicon spatial light modulator comprising a diffractive element, whereby said laser beam is emitted from said laser and is projected over an area by diffraction and reflection using said liquid crystal on silicon spatial light modulator, wherein said laser and said diffractive element are controlled by said microprocessor, wherein said laser beam has a longitudinal axis parallel to the propagation path of said laser beam, said receiving station comprises a photodiode receiver for detecting said transmitted laser beam and a radio transmitter, and said method comprises using a pointing diffraction mask and a tracking diffraction mask, wherein each pointing diffraction mask is generated in combination with a tracking diffraction mask in said diffractive element.

A light guide body in a display device includes a first incident surface on which an image light is incident, and a second emission surface from which the image light is emitted. The light guide body includes a second emission optical element that diffracts the image light to emit a portion of the image light at a predetermined emission angle every time the image light enters the second emission optical element from a predetermined direction. The image light is diverged by being emitted from the second emission optical element such that the predetermined emission angle varies in accordance with a location in one predetermined region included in a plurality of predetermined regions of the optical element. The degree of divergence varies between the one predetermined region and other predetermined region included in the plurality of predetermined regions in accordance with the location of the virtual image.

A display device includes a light guide body and displays an image of light emitted from the light guide body. The light guide body is of a curved shape, and includes a light guide plate and an optical element that diffracts and emits light propagating inside the light guide plate. The optical element is provided in the light guide body so that the angle of the optical element relative to a propagation direction in which the light propagates inside the light guide plate is constant irrespective of where in the optical element.

An image display apparatus that makes it possible to improve the tracking accuracy, while making the image display apparatus smaller in size. An image display apparatus includes a light source section that emits image display light OL used to display an image, and light CL conjugate to the image display light OL; an optical system that projects the image display light OL emitted by the light source section onto a pupil of an eye of a user, and projects the conjugate light CL emitted by the light source section onto a portion around the pupil of the eye of the user; a detector that detects reflected light that corresponds to the conjugate light CL projected by the optical system to be reflected off the portion around the pupil; and a controller that controls a position of a display-target image on the basis of the reflected light detected by the detector.

An apparatus and method to produce a hologram of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the object from the captured image.

An optical element includes a hologram layer, a resin substrate to which the hologram layer is adhered, and a holder portion that supports the resin substrate and has a thermal expansion coefficient smaller than that of the resin substrate. One of the holder portion and the resin substrate includes a contact surface along an axis extending in a plate thickness direction of the resin substrate, and the other of the holder portion and the resin substrate includes a pressing surface that presses the contact surface.

An optical element includes a hologram layer, a resin substrate to which the hologram layer is adhered, and a holder portion that supports the resin substrate and has a thermal expansion coefficient smaller than that of the resin substrate. One of the holder portion and the resin substrate includes a contact surface along an axis extending in a plate thickness direction of the resin substrate, and the other of the holder portion and the resin substrate includes a pressing surface that presses the contact surface.

To provide a display apparatus that makes it possible to further improve a performance in controlling video presentation according to characteristics of an eyeball of a user. A display apparatus is provided that includes a light source; a processor that performs processing on a distribution of characteristics of an eyeball; a monitoring section that monitors a state of the eyeball; a matching section that performs matching on the distribution of the characteristics of the eyeball and the state of the eyeball; and an irradiator that irradiates a specified position on a retina with video display light emitted by the light source.

To provide a display apparatus that makes it possible to further improve a performance in controlling video presentation according to characteristics of an eyeball of a user. A display apparatus is provided that includes a light source; a processor that performs processing on a distribution of characteristics of an eyeball; a monitoring section that monitors a state of the eyeball; a matching section that performs matching on the distribution of the characteristics of the eyeball and the state of the eyeball; and an irradiator that irradiates a specified position on a retina with video display light emitted by the light source.

A system for observing an object by using a hologram optical element is disclosed herein. In some embodiments, a system for observing an object includes an infrared (IR) light source for emitting infrared light, a hologram optical element (HOE) including an optical element film, wherein the optical element film for reflecting and diffracting the emitted infrared light, wherein infrared light of a specific wavelength from among the emitted infrared light emitted is reflected towards the object, and an IR light detector for detecting the infrared light of a specific wavelength reflected from the object.