An imaging apparatus (10) includes an imaging unit (11) that has a first pixel block and a second pixel block provided in a pixel region, the first pixel block including polarization pixels with two different polarization directions and a non-polarization pixel, the second pixel block including polarization pixels with a plurality of polarization directions including a different polarization direction from the first pixel block. An image processing apparatus (20) acquires a captured image generated by the imaging apparatus (10), and a correction coefficient calculation unit (40) calculates a correction coefficient that absorbs a sensitivity difference between polarization pixels and non-polarization pixels, on the basis of an image of the second pixel block. A polarization information generation unit (50) generates polarization information indicating the polarization characteristics of the object included in the captured image, using a non-polarization image and polarization component images generated by a demosaicing unit (30) and the correction coefficient calculated by the correction coefficient calculation unit (40). The correction coefficient of the sensitivity difference between the polarization pixels and the non-polarization pixels can be acquired without any calibration.

A laser system includes: a pulse laser system configured to emit a first laser beam having a first wavelength component and having a first polarization component and a second laser beam having the first wavelength component and having a second polarization component; a guide laser apparatus configured to emit a third laser beam having a second wavelength component; a polarization conversion mechanism configured to be able to switch between a first state in which the third laser beam is emitted as a first guide laser beam having the first polarization component, and a second state in which the third laser beam is emitted as a second guide laser beam having the second polarization component; a dichroic mirror configured to reflect the first and second laser beams having the first wavelength component or the first and second guide laser beams having the second wavelength component, to transmit the first and second laser beams or the first and second guide laser beams that are not reflected by the dichroic mirror; and a polarization beam splitter configured to reflect the first laser beam and the first guide laser beam, and to transmit the second laser beam and the second guide laser beam.

A hexahedral polarization beamsplitter is constructed with four substantially triangular prisms with a polarizing beamsplitter located within each of the interfaces between the assembled prisms. An input side of the assembly receives an unpolarized beam and two opposing output sides of the assembly transmit orthogonally polarized portions of the unpolarized beam in opposite directions. The polarizing beamsplitters are arranged at the interfaces so that each of the orthogonally polarized portions of the unpolarized beam is both reflected by one of the polarizing beamsplitters and transmitted by another of the polarizing beamsplitters.

An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.

A stereoscopic image apparatus that is capable of minimizing loss of optical energy and improving quality of a stereoscopic image is disclosed. The stereoscopic image apparatus includes a polarizing beam splitter to reflect or transmit incident light based on polarization components of the light to split the light in at least three different directions, a reflective member to reflect the light reflected by the polarizing beam splitter to a screen, at least one modulator to modulate the light reflected by the reflective member and the light transmitted through the polarizing beam splitter, and a refractive member disposed in an advancing direction of light to be incident upon the polarizing beam splitter to refract the light to be incident upon the polarizing beam splitter.

An opto-electronic system includes a laser operable to produce a laser beam; an optical element including two or more beam-shaping portions, each of the two or more beam-shaping portions having a different optical property; a beam deflector arranged to sweep the laser beam across the optical element to produce output light; and electronics communicatively coupled with the laser, the beam deflector, or both the laser and the beam deflector. The electronics are configured to cause selective impingement of the laser beam onto a proper subset of the two or more beam-shaping portions of the optical element to modify one or more optical parameters of the output light.

The present disclosure relates to a multifocal lens. The multifocal lens may include N liquid crystal panels in a stacked manner. The N liquid crystal panels may include an n-th liquid crystal panel, and the n-th liquid crystal panel may include an n-th converging element having an n-th focal length. N is a positive integer greater than or equal to 2, n is a positive integer, and 1≤n≤N. The n-th liquid crystal panel may be configured to be switchable between a converging state and a non-converging state. The N liquid crystal panels may be configured to make the multifocal lens to have switchable C.sub.N.sup.1+C.sub.N.sup.2+C.sub.N.sup.3+ . . . +C.sub.N.sup.N focal lengths, and the C.sub.N.sup.1+C.sub.N.sup.2+C.sub.N.sup.3+ . . . +C.sub.N.sup.N focal lengths are all different from one another.

An illumination system, including a laser light source, a wavelength conversion module, and a polarization conversion unit, and a projection device are provided. A laser beam of the laser light source is converted to a wavelength conversion beam by a wavelength conversion region of the wavelength conversion module. The polarization conversion unit has multiple first polarization conversion regions and multiple second polarization conversion regions, and includes multiple phase delay sheets correspondingly located on multiple surfaces facing the laser light source and located in the second polarization conversion regions. The wavelength conversion beam with a second polarization state leaves the polarization conversion unit after passing through a surface of the polarization conversion unit in the first polarization conversion regions facing the laser light source. The wavelength conversion beam with a first polarization state leaves the polarization conversion unit after passing through the phase delay sheet in the second polarization conversion region.

An optical communications system including two communications terminals in communication with each other using optical signals having the same wavelength. Both terminals include a half-wave plate polarizer for rotating linearly polarized optical signals and a quarter-wave plate polarizer for circularly polarizing the optical signals. The quarter-wave plate polarizers are oriented 90° relative to each other so that circularly polarized optical signals sent from one terminal to the other terminal are linearly polarized 90° relative to a transmission polarization orientation to be separable from the transmitted optical signals by a beam splitter.

An optical circulator and an optical module are provided. The optical circulator includes a first polarization beam splitter member having a common optical port, a second polarization beam splitter member having an emittance optical port and at least two receiving optical ports, and a first polarization adjustment member. The two receiving optical ports respectively receive two linearly polarized light beams. The two linearly polarized light beams respectively pass through the second polarization beam splitter member, and sequentially pass through the first polarization adjustment member and the first polarization beam splitter member to be combined into a first combined light beam for being output from the common optical port. The common optical port receives a compound optical signal that passes through the first polarization beam splitter member to be split into another two linearly polarized light beams that are combined into a second combined light beam for being output.