An optical device is described. At least a portion of the optical device includes ferroelectric non-linear optical material(s) and is fabricated utilizing ultraviolet lithography. In some aspects the at least the portion of the optical device is fabricated using deep ultraviolet lithography. In some aspects, the short range root mean square surface roughness of a sidewall of the at least the portion of the optical device is less than ten nanometers. In some aspects, the at least the portion of the optical device has a loss of not more than 2 dB/cm.

The present application discloses a 3D imaging method and apparatus, which divide a source 3D image light into two polarized light beams carrying image information through a birefringence effect, adjust optical paths of the two polarized light beams obtained through birefringence, and control the two polarized light beams to be alternately irradiated, thereby achieving 3D imaging; since the implementation of the above imaging method only requires one imaging apparatus having corresponding functions, the present application can simplify the system structure and reduce the system cost relative to a conventional 3D projection technology that requires two imaging devices; moreover, a viewer can directly see, with no need to wear corresponding 3D glasses, a 3D image due to the parallax caused by alternate irradiation of two polarized light beams carrying image information out of a projection device.

A display device includes a light source device, and a color converter optically coupled with the light source device. An array of regions of the light source device is configured to emit light of a first color. The color converter includes an array of color conversion regions including color conversion regions of a first type and of a second type. The color conversion regions of the first type are configured to convert the light of the first color into light of a second color. The color conversion regions of the second type are configured to convert the light of the first color into light of a third. A respective color conversion region of the array of color conversion regions includes a respective photonic crystal structure defining a respective two-dimensional pattern. The respective color conversion region also includes a color conversion matrix that includes color converting nanoparticles.

Provided is a low speed vehicle, such as a golf car, comprising a unique windshield. The windshield comprises a hinge and a top mount allowing the windshield to fold up for improved upper body safety and improved air circulation. The windshield has an upper portion that is fixed. The golf car/low speed vehicle also comprises a system for creating a virtual, visual display of information on the upper fixed portion of the windshield.

The technology of a zero loop-area oblique-incidence Sagnac interferometer and methods of using the Sagnac interferometer to detect magneto-optic Kerr effect is disclosed. An example apparatus includes: a light source configured to generate an optical beam; a beam splitter; a polarizer configured to separate the optical beam into two orthogonal components; a modulator configured to phase-modulating at least one of the two orthogonal components to produce a modulated pair of orthogonal components; a polarization dependent delay optics configured to direct the modulated pair of orthogonal components toward a surface of a sample to cause the modulated pair of orthogonal components to incident on the surface at an oblique angle; a mirror configured to reflecting the modulated pair of orthogonal components back towards the beam splitter; a photo receiver configured to receive a return beam redirected by the beam splitter; and a phase-sensitive detector.

The technology of a zero loop-area oblique-incidence Sagnac interferometer and methods of using the Sagnac interferometer to detect magneto-optic Kerr effect is disclosed. An example apparatus includes: a light source configured to generate an optical beam; a beam splitter; a polarizer configured to separate the optical beam into two orthogonal components; a modulator configured to phase-modulating at least one of the two orthogonal components to produce a modulated pair of orthogonal components; a polarization dependent delay optics configured to direct the modulated pair of orthogonal components toward a surface of a sample to cause the modulated pair of orthogonal components to incident on the surface at an oblique angle; a mirror configured to reflecting the modulated pair of orthogonal components back towards the beam splitter; a photo receiver configured to receive a return beam redirected by the beam splitter; and a phase-sensitive detector.

Provided is a windshield for a low speed vehicle such as a golf car. The windshield comprises a hinge and a top mount allowing the windshield to fold up for improved upper body safety and improved air circulation.

A sub-assembly for use in an electro-optic display, the sub-assembly comprising an electrically non-conductive substrate, a lamination adhesive layer, a light-transmissive electrically-conductive ceramic layer, and a light-transmissive non-ceramic electrically-conductive layer positioned between the light transmissive electrically-conductive ceramic layer and the lamination adhesive layer.

A modulator drive circuit, including: a first transistor having: a first output terminal connected to a first reference voltage, a second output terminal connected to a first output terminal of the modulator drive circuit, and a control terminal; and a second transistor having: a first output terminal connected to a second reference voltage different from the first reference voltage, a second output terminal connected to the first output terminal of the modulator drive circuit, and a control terminal.

A system to adjust light path length using a digital light path length modulator. The digital light path modulator includes an optical path length extender (OPLE) and a polarization modulator. The OPLE has two light paths having different path lengths, so light with a first polarization is directed through a first light path, and the light with a second polarization is directed through a second light path through the OPLE.