Provided is an electro-optical phase modulation system, including: an electro-optical crystal, a radio frequency circuit and a light source, light incident surface of the electro-optical crystal is in parallel with light exit surface, upper electrode surface thereof is in parallel with lower electrode surface, and an angle between light incident surface and upper electrode surface is Brewster angle; two electrodes of radio frequency circuit are connected to upper and lower electrode surfaces respectively, for transmitting radio frequency signals to upper and lower electrode surfaces, so that an electric filed, direction of which is perpendicular to upper electrode surface, is formed between upper and lower electrode surfaces; light source is located at a side of light incident surface, and incidence angle of beams from light source with respect to light incident surface is Brewster angle. The system is used to reduce residual amplitude modulation, and increase accuracy of phase modulation.

An electro-optic modulator comprising at least one nanodisordered potassium tantalate niobate crystal; first and second conductors operatively connected to the nanodisordered potassium tantalate niobate crystal adapted to be connected to a voltage source to modulate light passing there through; whereby light is modulated by passing through the nanodisordered potassium tantalate niobate crystal. A method for modulating light comprising providing at least one at least one nanodisordered potassium tantalate niobate crystal; providing first and second conductors operatively connected to the nanodisordered potassium tantalate niobate crystal adapted to be connected to a voltage source to modulate light passing there through; providing an interrogating light beam striking at least one nanodisordered potassium tantalate niobate crystal; modulating light passing through the nanodisordered potassium tantalate niobate crystal; and receiving a modulated light beam.

Provided are a thin film for optical element as a single-layer thin film which contains a Si simple substance, a Si compound excluding Si alloy, and a metal or metal compound, a method of manufacturing the thin film for optical element, and an optical element including the thin film for optical element. Further provided are an inorganic polarizing plate including a reflection suppressing layer composed of the thin film for optical element, a method of manufacturing the inorganic polarizing plate, and an optical device including the inorganic polarizing plate.

A switchable privacy display comprises a spatial light modulator, and switchable liquid crystal retarder arranged between crossed quarter-wave plates and polarisers. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance to reduce the visibility of the display to off-axis snoopers. The display may be rotated to achieve privacy operation in landscape and portrait orientations. Further, display reflectivity may be reduced for on-axis reflections of ambient light, while reflectivity may be increased for off-axis light to achieve increased visual security. In a public mode of operation, the liquid crystal retardance is adjusted so that off-axis luminance and reflectivity are unmodified. The display may also be operated to switch between day-time and night-time operation, for example for use in an automotive environment.

Provided is a quantum dot (QD) light modulator and an apparatus including the QD light modulator. The QD light modulator may include a QD-containing layer including QDs having light-emission characteristics, a refractive index change layer arranged adjacent to the QD-containing layer, and a reflector arranged facing the QD-containing layer. The refractive index change layer may include a carrier density change area in which a carrier density changes, and the carrier density change area may be arranged adjacent to the QD-containing layer. The light-emission characteristics of the QD-containing layer may be modulated according to a change in a property of the refractive index change layer. The QD light modulator may further include a nano-antenna structure arranged on the QD-containing layer.

An optical device includes a lens body including plural lenses of which optical axes are arranged alongside each other, and a light shielding body that is disposed with respect to the lens body and shields a part of light passing through the plural lenses, in which the light shielding body has a base that is provided, at a position shifted from the optical axes of the plural lenses, along an arrangement direction in which the plural lenses are arranged, and plural projecting portions that are positioned between the plural lenses and project from the base in an intersection direction intersecting the arrangement direction.

A method for determining a colored filter suitable for being applied to an ophthalmic lens to improve or maintain a wearer's visual comfort and/or the visual performance, includes: a) selecting source of light scattering to be placed in front of an eye of the individual based on the degree of scattering needed; b) visually presenting an image through the source of light scattering; c) measuring the individual's visual performance when image is visually presented through the source of light scattering; d) placing a colored filter in front of an eye of the wearer; e) visually presenting the same image of step b); f1) measuring the individual's visual performance again; g) comparing the individual's visual performance measured in step c) with the individual's visual performance measured in step f1); h) determining if the colored filter is a suitable colored filter based on the result of the comparison of step g).

The present embodiment relates to a variable-phase device including a new device structure that can solve various problems. The variable-phase device includes M pixels (where M is an integer of 2 or more) arrayed one-dimensionally or two-dimensionally, the M pixels each emitting light or modulating light. The array pitch of the M pixels is less than the wavelength of incident light and is constant along a predetermined direction. Each of the M pixels includes N sub-pixels (where N is an integer of 2 or more) each having a structure allowing the phase of outgoing light to vary. With respect to each of the M pixels, N partial light beams outputted from the N sub-pixels are combined into light having a single phase in the far field.

A device includes a polarization rotator configured to be switchable between operating in two switching states. The device also includes a controller configured to control the polarization rotator to switch between operating in the two switching states at a predetermined switching frequency, to thereby switch, a polarization of a component of an input light having an initial light intensity, between two orthogonal polarizations at the predetermined switching frequency. The device also includes a polarizer coupled with the polarization rotator, and configured to convert the input light transmitted through the polarization rotator into an output light having a light intensity reduced to a predetermined percentage of the initial light intensity of the input light.

An electro-holographic light field generator device is disclosed. The light field generator device has an optical substrate with a waveguide face and an exit face. One or more surface acoustic wave (SAW) optical modulator devices are included within each light field generator device. The SAW devices each include a light input, a waveguide, and a SAW transducer, all configured for guided mode confinement of input light within the waveguide. A leaky mode deflection of a portion of the waveguided light, or diffractive light, impinges upon the exit face. Multiple output optics at the exit face are configured for developing from each of the output optics a radiated exit light from the diffracted light for at least one of the waveguides. An RF controller is configured to control the SAW devices to develop the radiated exit light as a three-dimensional output light field with horizontal parallax and compatible with observer vertical motion.