Abstract: A system including an optical path length extender (OPLE) having two light paths having different path lengths, such that light entering the OPLE with a first polarization is directed through a first light path, and light entering the OPLE with a second polarization is directed through a second light path through the OPLE. The OPLE includes a first polarization sensitive reflective element at a first angle to the light entering the OPLE and a second angled polarization sensitive reflective element at a second angle to the light entering the OPLE, the second angled polarization sensitive reflective element intersecting the first polarization sensitive reflective element.

Abstract: Provided include a beam modulation apparatus for modulating an input light field and a projection system containing the apparatus. The input light field has a first light field and a second light field, having a difference of 90° in their polarization states. The apparatus includes a PBS prism, a first LCOS panel and a second LCOS panel. The first and the second LCOS panel are respectively over a side surface of the PBS prism opposing to an optical incident surface and an optical exit surface. Each LCOS panel comprises a plurality of pixels over a reflective surface thereof, with each pixel controllably switched on or off such that a polarity state of a light beam reflected by a portion of the reflective surface corresponding thereto is changed or remains unchanged. This beam modulation apparatus can be applied in a projection system, such as a laser TV projection system.

Abstract: Systems, devices, apparatuses and methods for formation of multiple separate light spots with adjustable intensity due to lossless redistribution of the light energy between the separate spots, and with a variable geometry of the multi-spot pattern; advantageously, for laser processing of materials by focusing the laser radiation on a workpiece. The multi-spot pattern is created due to angular polarization splitting of the light beam into several beamlets using a beam splitter and further focusing these beamlets onto a workpiece by a focusing optical system, advantageously by the scanning focusing optics. The beam splitter can include optical birefringent prisms, prism groups and waveplates capable to operate simultaneously at two different wavelengths. Some of these optical elements are rotatable, and their rotations are used for lossless redistribution of light energy between the spots and for a change in the geometric shape of the multi-spot patterns.

Abstract: There is provided an optical system, including a light-transmitting substrate having at least two major surfaces parallel to each other edges, and an optical device for coupling light into the substrate by total internal reflection. The device includes a polarization sensitive reflecting surface.

Abstract: A transparent substrate has two parallel faces and guides collimated image light by internal reflection. A first set of internal surfaces is deployed within the substrate oblique to the parallel faces. A second set of internal surfaces is deployed within the substrate parallel to, interleaved and in overlapping relation with the first set of internal surfaces. Each of the internal surfaces of the first set includes a first coating having a first reflection characteristic to be at least partially reflective to at least a first subset of components of incident light. Each of the internal surfaces of the second set includes a second coating having a second reflection characteristic complementary to the first reflection characteristic to be at least partially reflective to at least a second subset of components of incident light. The sets of internal surfaces cooperate to reflect all components of light from the first and second subsets.

Abstract: Embodiments of the present disclosure provide a display panel and an electronic device. The display panel includes: a back plate; a light emitting element on a side of the back plate; a circular polarizer on a side of the light emitting element away from the back plate; a wave plate on a side of the polarizer away from the back plate; and an anti-glare film layer on a side of the wave plate away from the back plate.

Abstract: An optical system includes an arrangement of optical components including a first polarization-selective reflector (PSR) associated with a third surface of a first prism. The first prism includes an entrance surface having a normal corresponding to a first rectangular axis of the first PSR. The first prism includes a second surface perpendicular to the entrance surface, and has a normal corresponding to a second rectangular axis of the first PSR. The arrangement of optical components defines a light path propagating toward the first PSR, traversing the first PSR, then traversing in a first direction a second PSR, and then reflecting from a second direction from the second PSR in an output image direction. The second PSR is inclined with respect to the first PSR so the output image direction is oblique to the first and second rectangular axes of the first PSR.

Abstract: An optical signal transceiver in a transistor outline package includes a component base, a laser device, a first wavelength division multiplexing prism and a second wavelength division multiplexing prism, a first photodetector, and a second photodetector. The component base is inside the transistor outline package and supports the laser device, the laser device emitting light to the outside of the transistor outline package. The first and second prisms and the first photodetector and the second photodetector are also located on the component base. Light output as optical signals sequentially pass through the first and second multiplexing prisms. The first input optical signal is transmitted to the first photodetector through the first prism, and the second input optical signal passes through the first prism and is passed on to the second photodetector via the second prism.

Abstract: An optical filter comprising a variable transmittance layer having a first spectrum in a dark state, and a second spectrum in a faded state; and a color balancing layer having a third spectrum; each of the first, second and third spectra comprising a visible portion; the first and third spectra combining to provide a dark state spectrum approximating a dark state target color, and the second and third spectra combining to provide a faded state spectrum approximating a faded state target color. The optical filter may further comprise a light attenuating layer. The optical filter may further comprise part of a laminated glass.

Abstract: A display apparatus includes a light emitting module to emit light; a first prism sheet provided on the light emitting module; a reflective polarizing sheet provided on the first prism sheet to transmit first polarized light of the light exiting the first prism sheet and reflect second polarized light of the light exiting the first prism sheet; a second prism sheet provided on the reflective polarizing sheet; and a liquid crystal panel provided on the second prism sheet, the liquid crystal panel including a liquid crystal cell, a first polarizing sheet provided on a first side the liquid crystal cell, and a second polarizing sheet provided between the second prism sheet and a second side of the liquid crystal cell, wherein the second prism sheet is configured to control a transmission angle at which the light exiting the reflective polarizing sheet is transmitted by the liquid crystal cell.

Abstract: A optical filter comprising a variable transmittance layer having a first spectrum in a dark state, and a second spectrum in a faded state; and a color balancing layer having a third spectrum; each of the first, second and third spectra comprising a visible portion; the first and third spectra combining to provide a dark state spectrum approximating a dark state target color; and the second and third spectra combining to provide a fades state spectrum approximating a faded state target color. The optical filter may further comprise a light attenuating layer. The optical filter may further comprise part of a laminated glass.

Abstract: A multiple wavelength selective switch has an optics assembly to receive a first input optical signal from a first ingress port and a second input optical signal from a second ingress port. A switch assembly has a single switching mechanism to direct the first input optical signal to the optics assembly as a first output optical signal and the second input optical signal to the optics assembly as a second output optical signal. The switch assembly directs the first output optical signal to a first egress port selected from the first set of egress ports and directs the second output optical signal to a second egress port selected from the second set egress ports. The first egress port and the second egress port have the same wavelength channel. The multiple wavelength selective switch supports an arbitrary number of wavelength channels that can be switched at the same time. Each switch assembly directs signals from a set of ingress ports to a set of egress ports sharing the same wavelength channel.

Abstract: A optical filter comprising a variable transmittance layer having a first spectrum in a dark state, and a second spectrum in a faded state; and a color balancing layer having a third spectrum; each of the first, second and third spectra comprising a visible portion; the first and third spectra combining to provide a dark state spectrum approximating a dark state target color; and the second and third spectra combining to provide a fades state spectrum approximating a faded state target color. The optical filter may further comprise a light attenuating layer. The optical filter may further comprise part of a laminated glass.

Abstract: An autostereoscopic display uses a light diffusing arrangement which provides a greater degree of light diffusion for ambient light passing into the display than for the light modulated by the display pixels and exiting the display after reflection.

Abstract: Passive optical systems and methods for improving polarization of an optical reference beam are disclosed. For example, an optical system includes first and second quarter wavelength plates (QWPs) positioned in a beam path of the optical system. The second QWP is positioned in the beam path such that a fast axis of the second QWP is substantially orthogonal to a fast axis of the first QWP. First and second polarization elements are also positioned in the beam path. The first and second polarization elements are each configured to provide both diattenuation and retardance of the optical reference beam.

Abstract: The invention relates to a beam combiner for a Raman pump unit. The beam combiner is configured to receive and propagate at least two orthogonally polarized collimated light beams. The beam combiner comprises a birefringent prism and an optically isotropic prism. Each of the prisms is located in the path of the beams and configured so that the beams are substantially parallel to each other when they emanate from the beam combiner.

Abstract: A projection device includes: a plate shaped member that is thermally conductive; a light emitting element that is disposed upon the plate shaped member and emits light; a bending member that bends light from the light emitting element into an orientation parallel to the plate shaped member; a modulation element that modulates light bent by the bending member; and a polarized light separation element that bends light modulated by the modulation element into an orientation going away from the plate shaped member.

Abstract: The present disclosure provides an optical component array and method of making an optical component array that can include a plurality of optical components useful for projection devices or other optical devices. The optical component array can be fabricated such that individual optical components having several elements can be assembled in a massively parallel manner and then singulated as individual optical components, and can result in a large reduction in manufacturing cost.

Abstract: A micro projection system includes a primary prism as a light guide device. The primary prism has a bottom face and two slope faces. A light source module and a collimation lens are arranged at the bottom face of the primary prism to project red, green, and blue lights onto one of the slope faces of the primary prism to be consolidated by a wedge prism group and reflected toward a polarization beam splitting wedge prism arranged at another slope face, where the light is split into two polarized lights that are then emitted out of the primary prism to be processed and combined as light of consistent polarization by a lens array and a polarization conversion film so as to facilitate condensation and projection of the light by a polarization beam splitter and a projection lens.

Abstract: A light source device includes: a first light source (3a) that emits first polarized light of a plurality of colors including different wavelengths; a second light source (3b) that emits second polarized light whose polarization state differs from that of the first polarized light and that includes light of at least one color from among the plurality of colors; and a first color synthesis optical element (1) that synthesizes the first polarized light emitted from the first light source (3a) and the second polarized light emitted from the second light source (3b).

Abstract: A polarizing beam splitter (“PBS”) includes a glass wedge having a first oblique surface, a multi-layer polarizing coating disposed on the first oblique surface of the glass wedge, and a plastic wedge having a second oblique surface. The first oblique surface of the glass wedge is mated to the second oblique surface of the plastic wedge with the multi-layer polarizing coating sandwiched between the first and second oblique surfaces.

Abstract: A display includes an effective display area and a frame area; an image overlap display area is disposed at a position in the effective display area, close to the frame area, and includes first display positions related to an image to be displayed in the effective display area and second display positions related to an image to be displayed in the frame area; the first and second display positions are distributed in an alternate form; a polarization splitting prism is disposed on a light-emitting surface of the display and at a position at least corresponding to the frame area and the image overlap display area; and a convergent prism configured to converge light from the second display positions in the image overlap display area to the frame area is disposed on a light-emitting surface of the polarization splitting prism. Also a tiled display is disclosed.

Abstract: A beam shaping device, consists of a polarization beam splitter interface (PBS interface), four light surfaces and at least one light processing surface, as well as various entities are described. The PBS interface passes light in P polarization and reflects light in S polarization; two of the four light surfaces are light I/O surfaces, and the other two of them are light surfaces for processing (LSFP); the light processing surface is arranged and oriented to retro-reflect, or close to retro-reflect light beam coming from said PBS interface and back it to where it comes from, and, in the meantime, physically rotate the reflected light beam around its propagating direction by 90°, or close to 90°. The invention works for light beam in any polarization status including non-polarized beam.

Abstract: An image projection apparatus guides light from a light source to a first and a second image modulation elements and projects light modulated by the first and second image modulation elements towards an image plane. A first color separation element reflects first linearly polarized light of a first color light so as to guide the first linearly polarized light to the first image modulation element side, transmits second linearly polarized light of the first color light so as to guide the second linearly polarized light to the second image modulation element side, and reflects or transmits both of the first and second linearly polarized light of a second color light so as to guide both of the first and second linearly polarized light of the second color light to the second image modulation element side.

Abstract: Example light management films including a plurality of tapered protrusions are described. In some examples, the disclosure relates to a film comprising a reflective polarizer layer and a plurality of tapered protrusions disposed on and tapering away from the reflective polarizer layer, where the tapered protrusions include at least one of a plurality of substantially conical shaped protrusions or a plurality of pyramidal shaped protrusions including at least four side faces. The plurality of tapered protrusions may be configured to reduce the divergence of incident light and redirect a majority of incident light propagating along a first direction to a second direction different from the first direction.

Abstract: The embodiments of present disclosure disclose a prism sheet, a backlight module and a liquid crystal display device thereof. The prism sheet comprises a first sub-prism sheet and a second sub-prism sheet with faces being closely bonded with each other, the first sub-prism sheet having a plurality of protrusions on the surface being bonded with the second sub-prism sheet, and the second sub-prism sheet having recesses on the surface being bonded with the first sub-prism sheet corresponding to the protrusions, wherein the first sub-prism sheet and the second sub-prism sheet are made of materials having different refractive indexes.

Abstract: An illumination system and a projection device comprising the same are provided. The projection device further comprises an imaging system. The illumination system comprises a first light source, a dichroic element and a wheel plate. The dichroic element comprises a first dichroic portion and a second dichroic portion. The first light source provides a first wave band light, which is reflected to the wheel plate by the first dichroic portion. When being projected onto a wave band transforming area of the wheel plate, the first wave band light will be transformed into a second wave band light by the wave band transforming area and then emits through the first dichroic portion and the second dichroic portion. When being projected onto a reflecting area of the wheel plate, the first wave band light will be reflected by the reflecting area to emit through the second dichroic portion.

Abstract: The disclosure relates to an optical system of a microlithographic projection exposure apparatus and to a microlithographic exposure method. An optical system of a microlithographic projection exposure apparatus includes an image rotator, which is arranged in the optical system such that light impinging on the image rotator is at least partially polarized. The image rotator rotates, for light impinging on the image rotator, both the intensity distribution and the polarization distribution of through a given angle of rotation.

Abstract: A projection device with an illumination adjustment function includes a polarization beam splitter (PBS), a display, a light source, a lens module, a power supply unit, a light detection unit and a power controller. The light source emits light to the PBS. The lens module projects the images to be displayed by the display. The power supply unit supplies power for the light source. The light detection unit acquires a digital value of a portion of the light transmitted from the PBS, and compares the digital value with a predetermined digital value to generate a control signal. The power controller adjusts power from the power supply unit to the light source according the control signal until the digital value matches the predetermined digital value of the light from the light source.

Abstract: An optical film stack includes a first optical film (220) having a first major surface and a second major surface. The second major surface (160) is a matte surface having a plurality of microstructures (241). The optical film stack includes a second optical film (230) having a third major surface and a fourth major surface. The third major surface of the second optical film is adjacent to the matte surface of the first optical film. The coefficient of friction, between the matte surface of the first optical film and the third major surface of the second optical film is less than about 1. The coefficient 241 of friction less than about 1 provided by the matte surface enhances the warp performance of the optical film stack.

Abstract: The present invention provides an apparatus for fetching optical images. Images from multiple channels are obtained. A device is used to automatically switch the images. The switching is based on time-sharing multiplexing (TSM). Thus, the images are formed on another device. The images are then integrated and displayed to be used in an optical vehicle safety assistant system.

Abstract: A light engine combines light of first, second, and third color ranges using three pentagonal prism elements. Each prism has first and second diagonal surfaces. Each first diagonal surface has a first dichroic treatment and each second diagonal surface has a second dichroic treatment. The prisms are arranged with the first diagonal surface of the first prism juxtaposed with one diagonal surface of the third prism and with the second diagonal surface of the second prism juxtaposed with the other diagonal surface of the third prism. A first light beam of the first color is reflected at a right angle by the first diagonal surfaces, and a second light beam is reflected at a right angle by the second diagonal surfaces. A third light beam of the third color passes unreflected through the surfaces to produce a combined light beam or common output light path.

Abstract: Microstructured optical films, assemblies of films including at least one microstructured optical film, and (e.g. illuminated) display devices including a single microstructured optical film or assembly.

Abstract: A polarizing prism is shaped in the form of a hexahedron. A polarizing beam splitter film (PBS film) is arranged approximately in a diagonal direction of the hexahedron. The polarizing prism holds a relationship of A<B when the dimension thereof in an outgoing direction (Y direction) of a light beam to a screen is A and the dimension thereof in an incident direction (X direction) of a light beam from a light source is B. For example, the polarizing prism is shaped in the form of a rectangular parallelepiped. At a plane on which the light beam is launched from a scanning mirror, one end of the PBS film is placed so as to intersect with the incident plane at an angle of approximately 45° at a position deviated inside by a difference between the dimensions A and B from the end of the incident plane.

Abstract: An optical film is provided. The optical film includes a substrate, a reflective polarizer, and a first transmission medium. The reflective polarizer is disposed at the front surface of the substrate. The first transmission medium is disposed at the rear surface of the substrate and comprises a plurality of V-shaped prisms. The substrate, the reflective polarizer, and the first transmission medium are bounded to each other to form a unitary sheet.

Abstract: An illuminating device is described comprising an optical source emitting an unpolarized light beam, a polarizing beam splitter comprising a grid polarizer situated between the faces of two prisms. The light beam penetrates into the first prism through a face and reaches the polarizing beam splitter that transmits the light having a first polarization direction to the face that reflects it toward an exit face. In addition, the splitter reflects the light having a second polarization direction to the face that reflects it toward an exit face.

Abstract: An optical device includes a first optical member and a second optical member formed of a medium having a refractive index greater than 1, and a multiple layer film section. The multiple layer film section has a structure in which at least two types of thin film layers namely a first thin film layer and a second thin film layer which has a refractive index higher than a refractive index of the first thin film layer, are stacked alternately. The first optical member and the second optical member are joined by an adhering means (an adhesive), and satisfy a predetermined condition. At the multiple layer film section, from a light incident, a light in a first wavelength band is let to be reflected, and a light in a second wavelength band which is shorter than the first wavelength band, and a light in a third wavelength band which is longer than the first wavelength band is let to pass (to be transmitted).

Abstract: A dual TIR prism has an input prism, a wedge prism, an output prism, and a reflective polarizer. The dual TIR prism is configured to receive an optical beam at an entrance surface, to pass the first polarization direction of the received optical beam from a second exit surface, and to output the second polarization direction of the received optical beam from a first exit surface of the input prism.

Abstract: Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the first and second optical beams to undergo different optical path lengths before they are recombined into a single output beam. An adjustment mechanism may used implemented to adjust the difference in the optical path lengths of the first and second beams to produce a variable DGD. When the depolarization of light is desired, the difference in the optical path lengths of the first and second beams is set to be greater than the coherence length of the input optical beam.

Abstract: A stereoscopic projection system includes an optical engine, a relay lens group, a polarization conversion system and two identical projection lenses. The optical engine is used for outputting a non-polarized image light. The non-polarized image light is imaged into the polarization conversion system through the relay lens group to produce an intermediate image. The polarization conversion system includes a polarization beam splitter, a polarization rotating element and a polarization switch. The polarization beam splitter is used for splitting the non-polarized image light into a first-state first polarized beam and a second-state second polarized beam, which have the same total optical length. By the polarization switch, the first output polarized beam and the second output polarized beam are alternately switched between the first state and the second state. The projection lenses are located in the first optical path and the second optical path for projecting the intermediate image.

Abstract: A polarized light converting system is disclosed in the present invention. The converting system includes a polarizing splitting unit, for splitting an unpolarized incident light beam into a first polarized light beam and a second polarized light beam, passing the second polarized light beam, and reflecting the first polarized light beam; a reflector for reflecting the second polarized light beam back through the polarizing splitting unit; a condensing unit, for guiding the condensed first polarized light beam through a first area and the condensed second polarized light beam through a second area which does not overlap the first area; and a retarder unit placed at either the first area or the second area for converting the unpolarized incident light beam into polarized light beams having the same polarization state such that illumination efficiency can be increased.

Abstract: An optically variable device is disclosed having a substrate with an array of pyramidal structures formed upon it or within it. The structures are coated with an optically variable color-shifting coating. Each of the structures form a pyramidal-like having at least three slanted faces and wherein one or more colors seen when viewing the pyramids vary as substrate is rotated at least 30 degrees about an axis orthogonal to the substrate. In order to see a color shift the device is rotated around the surface normal of the substrate, while keeping the angle of incidence to the light source the same, and keeping the viewing angle the same. Various forms of pyramids may be used, however pyramids with planar faces are most suitable.

Abstract: A tandem beam splitter for real-time polarization difference sensing, with at least one body having two faces that isolate two orthogonal planes of information from a common stimulus input in series, with a first of the two faces isolating a first plane of information and a second of the two faces isolating a second plane of information which is orthogonal to the first plane.

Abstract: An optically variable device is disclosed having a substrate with an array of pyramidal structures formed upon it or within it. The structures are preferably formed by printing pyramids with an optically variable color-shifting ink using an Intaglio-like printing process. Alternatively the structure can be formed by embossing a layer of ink with positive pyramids so as to yield an array of positive embossed pyramids. Each of the structures form a pyramidal-like having at least three slanted faces and wherein one or more than one color is seen when viewing the pyramids vary as substrate is rotated at least 30 degrees about an axis orthogonal to the substrate. In order to see a color shift the device is rotated around the surface normal of the substrate, while keeping the angle of incidence to the light source the same, and keeping the viewing angle the same. Various forms of pyramids may be used, however pyramids with planar faces are most suitable.

Abstract: A beam shaping module capable of receiving a polarized beam from a light source is disclosed including a beam splitter for splitting the polarized beam into a first beam and a second beam wherein the polarization directions of the first beam and the second beam are perpendicular to each other, and a beam combiner for shaping and combining the first beam and the second beam, where the beam combiner is configured to reverse the energy distribution pattern of one of the first beam and the second beam.

Abstract: Optical elements, color combiners using the optical elements, and image projectors using the color combiners are described. The optical elements can be configured as color combiners that receive different wavelength spectrums of light and produce a combined light output that includes the different wavelength spectrums of light. The optical elements include a wavelength selective dichroic mirror that reflects a major portion of actinic light that can damage a reflective polarizer within the optical element. The wavelength selective dichroic mirror transmits a major portion of other wavelengths of light. The resulting color combiners using the optical element may have improved durability compared to a color combiner lacking the wavelength selective dichroic mirror. Image projectors using the color combiners can include reflective (including digital micro-mirror) or polarization (including liquid crystal) imaging modules.

Abstract: A stereo projection optical system includes a polarization converter, a 2-way wheel, a retarder, and an image engine. The polarization converter is configured for converting an incident light into a polarized light which have single polarization. The 2-way wheel includes a reflective region and a transmissive region. The reflective region is configured for reflecting the polarized light and the transmissive region is configured for transmitting the polarized light. The retarder is positioned to receive an emergent light from one of the reflective region and the transmissive region. The image engine is positioned to receive light output of the 2-way wheel and the retarder and configured for emitting the light output comprising spatial information. The stereo projection optical systems provide viewers three-dimensional images formed by two alternative polarized light beams whose polarizations are perpendicular to each other utilizing the 2-way wheel.

Abstract: An optical system is provided, for example for use with a display device, for varying the shape of a surface in which an image displayed by the display device is perceived. The optical system comprises first and second spaced-apart partial reflectors, at least one of which is switchable between a first non-flat shape and a second different shape, which may be flat or non-flat. The reflectors, together with polarisation optics, provide a light path such that light from the display is at least partially transmitted by the first reflector, partially reflected by the second reflector, partially reflected by the first reflector and partially transmitted by the second reflector. Light which does not follow the light path is prevented from leaving the optical system.

Abstract: A polarization conversion element having plural polarization separation sections and plural phase modulation sections is disclosed. A light flux is separated into transmission light (P polarization) and reflection light (S polarization) by being input to a polarization separation section. The reflection light reflected at the polarization separation section is output in the same direction as that of the transmission light by being reflected again at an adjacent polarization separation section at a different position from a position where a light flux is input to the adjacent polarization separation section. The phase modulation section is disposed on an optical path of the transmission light or the reflection light and output light becomes the same polarization.

Abstract: A polarizing device for converting a circularly polarized light beam into a radial polarized light beam, wherein the circularly polarized light beam is obtained by passing a linearly polarized light beam oscillated from a laser oscillator through a quarter-wave plate. The polarizing device includes an axicon lens having a conical surface and a dielectric film formed on the conical surface of the axicon lens.