A photonic heater is provided. The photonic heater includes a current source and a transfer circuit. The transfer circuit connected to the current source. The photonic heater further includes a heating element. The heating element is connected to the transfer circuit. The transfer circuit is operable to regulate an amount of current being transferred from the current court to the heating element.

A lighting device including: a light guide, a reflecting sheet and a first prism sheet, in which a first white LED, a second white LED and a third white LED are disposed in a same interval on a first side surface and on a second side surface, which opposes to the first side surface, a first prism array extending in a first direction and arranged in a second direction is formed on the major surface, a second prism array extending in a second direction and arranged in a first direction is formed on the back surface, the reflecting sheet is disposed under the back surface of the light guide, the first prism sheet is disposed on the major surface of the light guide, and a third prism array, extending in the second direction and arranged in the first direction is formed on the back surface of the first prism sheet.

A directional illuminator includes a light source, a pupil-replicating lightguide, and a tiltable reflector coupling the light source to the pupil-replicating lightguide. The exit beam angle of the light outputted by the pupil-replicating lightguide follows the in-coupling angle, and accordingly depends on the tilting angle of the tiltable reflector. The directional illuminator with steered light beam may be used to illuminate a display panel. Steering the illuminating light by the tiltable reflector enables one to steer the exit pupil of the display device to match the user's eye location(s).

A display device includes a directional illuminator providing a light beam, a display panel downstream of a directional illuminator, for receiving and spatially modulating the light beam, and a beam redirecting module downstream of the display panel, for variably redirecting the spatially modulated light beam. Steering the illuminating light by the beam redirecting module enables one to steer the exit pupil of the display device to match the user's eye location(s).

Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.

A system for controlling at least one focus aspect of adaptive spectacles (10) having at least one electrically-tunable lens (22), the system including a housing (14), which is physically separate from adaptive spectacles (10), a display screen (16) mounted in housing (14), a sensor (19) mounted in housing (14) and configured to detect a relative position of adaptive spectacles (10) with respect to display screen (16), an interface (17) configured to communicate with adaptive spectacles (10), and a controller (15) configured to receive an input signal from sensor (19), the input signal being indicative of the relative position of adaptive spectacles (10) with respect to display screen (16) and output, in response to the input signal, a command signal for sending to adaptive spectacles (10) via interface (17) to adjust the at least one focus aspect of the at least one electrically-tunable lens (22).

A system for controlling at least one focus aspect of adaptive spectacles (10) having at least one electrically-tunable lens (22), the system including a housing (14), which is physically separate from adaptive spectacles (10), a display screen (16) mounted in housing (14), a sensor (19) mounted in housing (14) and configured to detect a relative position of adaptive spectacles (10) with respect to display screen (16), an interface (17) configured to communicate with adaptive spectacles (10), and a controller (15) configured to receive an input signal from sensor (19), the input signal being indicative of the relative position of adaptive spectacles (10) with respect to display screen (16) and output, in response to the input signal, a command signal for sending to adaptive spectacles (10) via interface (17) to adjust the at least one focus aspect of the at least one electrically-tunable lens (22).

[Object] To provide a display apparatus that displays a projection image with an improved resolution.

[Solving Means] A display apparatus (10) includes a light-emitting device (13), a micro-lens array (5), and a scanning mechanism (54). The light-emitting device (13) includes a plurality of first light-emitting pixels and a plurality of second light-emitting pixels. The micro-lens array (5) includes a plurality of lenses (53) that projects the diffuse light rays emitted respectively from the first light-emitting pixel and the second light-emitting pixel, which have been made incident, to a first reaching position and a second reaching position located at desired different positions of a projection target object (3), respectively, the plurality of lenses being arranged at a pitch larger than a pixel pitch of the light-emitting pixels. The scanning mechanism (54) projects the diffuse light ray emitted from the first light-emitting pixel to the first reaching position via the micro-lens array (5) and then projects the diffuse light ray emitted from the second light-emitting pixel to the second reaching position via the micro-lens array (5).

[Object] To provide a display apparatus that displays a projection image with an improved resolution.

[Solving Means] A display apparatus (10) includes a light-emitting device (13), a micro-lens array (5), and a scanning mechanism (54). The light-emitting device (13) includes a plurality of first light-emitting pixels and a plurality of second light-emitting pixels. The micro-lens array (5) includes a plurality of lenses (53) that projects the diffuse light rays emitted respectively from the first light-emitting pixel and the second light-emitting pixel, which have been made incident, to a first reaching position and a second reaching position located at desired different positions of a projection target object (3), respectively, the plurality of lenses being arranged at a pitch larger than a pixel pitch of the light-emitting pixels. The scanning mechanism (54) projects the diffuse light ray emitted from the first light-emitting pixel to the first reaching position via the micro-lens array (5) and then projects the diffuse light ray emitted from the second light-emitting pixel to the second reaching position via the micro-lens array (5).

A diffractive optic reflex sight (DORS) is provided for aiming devices in which a virtual image, such as a reticle, is produced and appears in the distance of a user's view when looking through the reflex sight. A light source illuminates a diffractive optical element (DOE) that includes a modulation pattern that generates a patterned illuminations corresponding with the virtual image. A reflective image combiner then reflects the patterned illumination so that the virtual image appears in the distance of the viewer's view. The DORS optical design system is mechanically and optically stable for precision aiming across a range of environmental conditions and in different use scenarios or applications including use in rapidly changing temperatures, varying light conditions, and a wide range of user proficiencies. The DORS optical design system is a readily manufacturable aiming and sighting device for a wide range of applications from handguns to astronomical telescopes.