Abstract: Disclosed are an OLED display structure and an OLED display device having the OLED display structure. The OLED display structure comprises: a substrate (10), and an OLED pixel layer (20), an o-light and e-light splitting and converting device (5) and a circular polarizer layer (6) which are formed on the substrate (10) in sequence; the o-light and e-light splitting and converting device (5) is adapted to divide a light beam into o-light and e-light, and to convert the o-light and the e-light into circularly polarized light which has the same polarization state as the circular polarizer layer (6); the circular polarizer layer (6) is adapted to allow passage of the circularly polarized light which has the same polarization state as it. With the display structure, the light transmittance is improved, and the pixel current of the OLED pixel layer (20) is reduced, and thereby energy is saved.

Abstract: In a lighting device, light in a first wavelength range which is output from a light emitting element passes through a first phase difference plate, and is separated into a first light flux and a second light flux by a polarization separation element. A wavelength conversion unit converts the first light flux to a third light flux. An optical element converts the second light flux into a fourth light flux. A first color combining element combines the third light flux with the fourth light flux. A first control unit changes a direction of an optical axis of the first phase difference plate according to an intensity of the third light flux and an intensity of the fourth light flux.

Abstract: A first dichroic mirror (2a) and a second dichroic mirror (2b) are formed on the bonding surfaces between four right angle prisms (1a-1d) so as to intersect. The first dichroic mirror (2a) transmits, of visible light of P-polarization, at least the light of a specific wavelength band and reflects, of visible light of S-polarization, at least the light of the specific wavelength band. The second dichroic mirror (2b) transmits, of visible light of P-polarization, at least light of the specific wavelength band and transmits, of visible light of S-polarization, at least light of the specific wavelength band. The cutoff wavelengths with respect to S-polarized light of both dichroic mirrors (2a and 2b) are set within ranges of bands other than those of the three primary colors of light.

Abstract: A system for projecting to a viewing surface includes an illumination source to project a first image onto the viewing surface along a beam path, an LCD, with at least one pixel having a polarization rotation profile that approaches zero at an edge, for placement in the beam path of the illumination source to the viewing surface to transmit the first image in a first polarization state through the LCD to the viewing surface and to propagate a second image in a second polarization state from the LCD to the viewing surface, and a first polarization filter to provide the first image in the first polarization state prior to the first image being transmitted through the LCD. At least one of the first image in the first polarization state and the second image in the second polarization state is in a non-detectable polarization state when illuminated upon the viewing surface.

Abstract: An illumination device comprises a light source (3a) that includes a solid-state light source whose peak wavelength is set in the red wavelength band, a light source (3b) that includes a solid-state light source whose peak wavelength is set in the green wavelength band, a light source (3c) that includes a solid-state light source whose peak wavelength is set in the blue wavelength band, and a color synthesis optical element (1) that combines P-polarized colored light incident from one light source (3b) and S-polarized colored light incident from the other two light sources (3a and 3c). One light source (3c) includes at least one solid-state light source whose peak wavelength is set in the wavelength band of the color corresponding to one of the other light sources (3b).

Abstract: A display device includes a display panel including a display area for displaying an image and a non-display area adjacent to the display area, a polarizing plate positioned on the display panel and including a polarizing layer for polarizing light that passes through the polarizing layer, and a light shielding layer positioned between the display panel and the polarizing plate. The light shielding layer is formed at an edge of the display panel to correspond to the non-display area.

Abstract: An illumination beam adjustment apparatus is disclosed. The apparatus comprises a housing (4), a plurality of first optical elements (12) fixed relative to the housing and adapted to receive and transmit electromagnetic radiation and adjust the beam angle of a beam of electromagnetic radiation passing therethrough, and a second optical element (14) removably mounted relative to the housing and adapted to receive electromagnetic radiation from the first optical elements and transmit electromagnetic radiation. The second optical element is adapted to adjust the beam angle of a beam of an electromagnetic radiation passing therethrough.

Abstract: An optical system is configured to introduce light modulated by a reflective light modulator to a projection lens configured to project the light onto a target plane. The optical system includes a polarization beam splitter configured to introduce each of first colored light as p-polarized light and second colored light as s-polarized light to a corresponding one of reflective optical modulators that are different from each other, and to synthesize light fluxes modulated by the reflective optical modulators with each other, a beam splitter arranged between the polarization beam splitter and the projection lens and configured to split the first colored light in accordance with a polarization direction of the first colored light and to transmit or reflect the second colored light irrespective of a polarization direction of the second colored light, and a half-wave plate arranged between the polarization beam splitter and the beam splitter.

Abstract: Aspects of the present invention relate to optical systems in head worn computing.

Abstract: A projector includes a light source, an image forming system adapted to form an image using light from the light source, a projection system adapted to project the image formed by the image forming system, and a dimming device including a light-blocking member adapted to move into and out of a light path between an exit end surface of the projection system and the light source, and adapted to control an intensity of the light emitted from the light source. The light-blocking member includes a first movable section having at least one light-transmitting section and a light-blocking section, and a second movable section adapted to block the light passed through the light-transmitting section. At least one radiator plate is provided to either one or both of the first movable section and the second movable section.

Abstract: There is provided a light source unit having a light source which emits a laser beam, a plurality of diffusing plates on which the laser beam is incident and which emit the laser beam incident thereon as diffuse light, and a driving mechanism which moves the plurality of diffusing plates, wherein the laser beam from the light source is incident on one diffusing plate of the plurality of diffusing plates, and diffuse light emitted from the one diffusing plate is incident on the other diffusing plate of the plurality of diffusing plates.

Abstract: The present invention relates generally to a head-mounted projection display, and more particularly, but not exclusively to a polarized head-mounted projection display including a light engine and a compact, high-performance projection lens for use with reflective microdisplays.

Abstract: An image projector for augmenting the appearance of a physical object is disclosed, also known as an augmented reality projector. The augmented reality projector comprises an optical arrangement to provide the possibility of precise matching of a projected image of the physical object back onto the object itself, instead of using digital image processing to do so. Digital image processing may be used to enhance features of the image and is not required for resizing or orienting the image to the object. This reduces the need for computational power to process the image and spares processing resources to refresh the image in real time. Accordingly, the processed image can be refreshed to change the appearance of a moving object. Furthermore, the precise matching provides the possibility of using projected images a graphical use interface, as movements of a user's fingers on the interface can be determined accurately.

Abstract: A projector including a light source apparatus that includes a fluorescent layer that produces fluorescence by irradiation of an excitation light emitted from a solid-state light source, a polarization conversion element that converts the light from the light source apparatus into polarized light, and a reflector that is disposed between the light source apparatus and the polarization conversion element, transmits light in the vicinity of the optical axis of the light source apparatus, and reflects peripheral light apart from the optical axis of the light source apparatus toward the fluorescent layer.

Abstract: A projector includes: a spatial light modulator provided for each color light flux and configured to modulate the light flux in accordance with an image signal; a light combining system configured to combine the color light flux outputted from the spatial light modulator; a projection system configured to project the light combined by the light combining system; a fixing member configured to integrally fix the spatial light modulator, the light combining system, and the projection system; a base on which the spatial light modulators and the light combining system fixed to the fixing member are mounted; and a cover member configured to cover the spatial light modulator and the light combining system mounted on the base, wherein the base and the cover member form a cooling duct through which cooling air for sequentially cooling the spatial light modulator for the respective color light flux flows.

Abstract: Two light modulators, a first light modulator and a second light modulator, suffice for four light sources, a first light source, a second light source, a third light source, and a fourth light source, whereby the cost can be lowered as compared with a configuration in which three light modulators are required. As a result, cost reduction is achieved. Further, since two light modulators suffice, the size of the projector can be reduced as compared with the configuration in which three light modulators are required.

Abstract: An optical system having coherence reduction capabilities includes a light source for generating a first light pulse; an asymmetrical pulse stretcher arranged to receive the first light pulse and to generate multiple light pulses, during a pulse sequence generation period, wherein the asymmetrical pulse stretcher includes multiple optical components which define a loop and a condenser lens is located between the asymmetrical pulse stretcher and an object, for directing the multiple pulses toward an area on the object At least two optical components of the multiple optical components are positioned in an almost symmetrical manner in relation to each other and introduce a coherence-related difference between at least two pulses of the multiple pulses. The pulse sequence generation period does not exceed a response period of a detector.

Abstract: A speckle reducing device includes: a polarization splitter element with a polarization splitter portion that splits incident light into first and second light containing a first and a second component respectively, which outputs the first and the second light along different directions; a first reflecting member that reflects the first light to reenter the polarization splitter element; a first conversion member disposed between the first reflecting member and the polarization splitter element, which converts the first light to third light containing the second component; a second reflecting member that reflects the third light to reenter the polarization splitter element; and a second conversion member disposed between the second reflecting member and the polarization splitter element, which converts the third light to fourth light containing the first component, wherein: the polarization splitter element outputs the second and the fourth light along one direction.

Abstract: A projector includes a solid-state light source, a diffuser member, an excitation light source, a phosphor, a light modulator, a projection system, a first and a second light blocking members. When the area, viewed in the direction of the optical axis of diffused light, of an opening of the first light blocking member and the area of a portion over which the first light blocking member blocks the diffused light are defined as A1 and A2, respectively; the area, viewed in the direction of the optical axis of fluorescence, of an opening of the second light blocking member and the area of a portion over which the second light blocking member blocks the fluorescence are defined as B1 and B2, respectively, the ratio A2/A1 is greater than the ratio B2/B1.

Abstract: An optical element that can reduce the etendue of emitted light emitted from the optical element without having depend on the etendue of light-emitting elements is provided with a plasmon-excitation layer that is interposed between two layers having dielectric properties wherein, taking the plasmon-excitation layer as a border, the effective dielectric constant of the emission-side portion that is the emission layer side is higher than the effective dielectric constant of the incident-side portion that is the side of a carrier-generating layer, and the dielectric constant between the plasmon-excitation layer and the carrier-generating layer is higher than the dielectric constant between the carrier-generating layer and the light-incident surface.

Abstract: A light module for a projection apparatus, comprising a laser apparatus adapted to emit linearly polarized radiation in the blue wavelength range, a luminous wheel arranged in the beam path of the radiation emitted by the laser apparatus, a first beam splitter arranged in the beam path of the radiation emitted by the laser apparatus between the laser apparatus and the luminous wheel, a focusing apparatus arranged in the beam path of the radiation emitted by the laser apparatus between the first beam splitter and the luminous wheel, and at least one polarization manipulation apparatus, adapted to rotate the polarization of radiation that has passed through it twice in different directions through 90°, wherein the first beam splitter is arranged such that it is also located in the beam path of radiation in the blue wavelength range which has passed twice through the polarization manipulation apparatus in different directions.

Abstract: A laser beam combining device includes three lasers, a polarizer, and a mode converter. The second laser device, the mode converter, and the third laser device are located on a first straight line in that order. The polarizer intersects with the first straight line at an imaginary joint point. An included angle between the first straight line and the polarizer is about 45 degrees. The polarizer and the mode converter are positioned between the second laser device and the third laser device. The polarizer is adjacent to the second laser device. The mode converter is adjacent to the third laser device. The first laser device faces the polarizer and is located on a second straight line perpendicular to the first straight line and passing through the joint point. The three laser devices emit TE mode red, green and blue laser beams, respectively.

Abstract: A light source module includes a light-emitting device, a wavelength conversion device and a polarization and color separation unit. The light-emitting device provides an excitation beam including a first portion beam having a first polarization direction. The wavelength conversion device includes a first wavelength conversion area and a polarization conversion area. When the first portion beam irradiates the first wavelength conversion area, the first portion beam is converted into a first color beam. When the first portion beam irradiates the polarization conversion area, the first polarization direction of the first portion beam is converted to a second polarization direction. The polarization and color separation unit is disposed between the wavelength conversion device and the light-emitting device, and transmits the first portion beam with the first polarization direction, and reflects the first portion beam with the second polarization direction and the first color beam to the same direction.

Abstract: A light module for a projection device may include: at least one light source designed to emit partly polarization radiation; and a first polarization beam splitter, which is arranged in the beam path of the radiation emitted by the at least one light source, wherein the polarization beam splitter is designed to provide radiation of a first polarization at a first output and radiation of a second polarization at a second output. The light module includes a first beam cube arranged in the beam path of the radiation, a first to fourth LCD panels; a second dichroic beam splitter arranged between a first output of the first polarization beam splitter and a first input of the beam cube.

Abstract: A projector using coherent light as a light source includes: one or more coherent light sources emitting coherent light beams; a beam scanner which changes a direction of the coherent light beam; and a beam splitter which splits a beam into multiple segments and changes a phase of light of each split segment, the beam splitter being located in an optical path between the beam scanner and the coherent light source. This projector reduces speckle noises. The beam splitter includes a pair of transparent substrates; a plurality of parallel electrodes disposed on each surface of the pair of transparent substrates, the pair of the parallel electrodes being disposed in a perpendicular direction to each other. Voltages are applied to the respective electrodes at predetermined time intervals so as to produce different potentials in a liquid crystal sandwiched by the transparent substrates.

Abstract: A projector includes a light modulation unit including a liquid crystal device that modulates illumination light to form image light and a light exiting-side polarizer that causes the image light from the liquid crystal device to exit as linearly polarized light, a first retardation film that changes the polarization state of the image light from the light exiting-side polarizer into circular polarization or elliptical polarization, a polarization switching liquid crystal panel that switches the polarization state of the image light from the first retardation film in accordance with a control signal, a second retardation film that changes the polarization state of the image light from the polarization switching liquid crystal panel into linear polarization, and a birefringent substrate that selectively refracts a light component polarized in a direction corresponding to a specific switching state of the polarization switching liquid crystal panel among the image light from the second retardation film.

Abstract: A three-dimensional image display device includes: a display panel including a plurality of pixels each having red, green and blue sub-pixels, the red, green and blue sub-pixels alternately disposed along a horizontal direction and each of the red, green and blue sub-pixels disposed in a single line along a vertical direction; and a parallax barrier over the display panel, the parallax barrier including a plurality of open areas and a blocking area surrounding the plurality of open areas, the plurality of open areas alternating with the blocking area, and each of the plurality of open areas corresponding to each couple of the adjacent two sub-pixels.

Abstract: An imaging lens having reduced susceptibility to thermally-induced stress birefringence for imaging an object plane to an image plane; comprising a plurality of lens elements. The lens element that experiences a highest optical power density is fabricated using a glass having a negligible susceptibility to thermal stress birefringence as characterized by the thermal stress birefringence metric. The other lens elements are fabricated using glasses having a negligible or a moderate susceptibility to thermal stress birefringence, at least one of the other lens elements being fabricated using a glass having a moderate susceptibility to thermal stress birefringence.

Abstract: A projection type display apparatus including a light source, a display element, an illumination optical system and a projection lens to project a magnified image of the optical image. The illumination optical system includes a first array lens and a second array lens, each includes a plurality of lens elements arranged in a matrix, each of the lens elements having a rectangular opening, and a polarization conversion element having polarization conversion function by use of a plurality of polarized beam splitters and a plurality of half-wave phase plates, arranged in an array and opposing to the lens elements of the second array lens, to emit predetermined polarized light. The light source includes a light emitting plane of a rectangle or an ellipse shape, a longitudinal direction of the light emitting plane being parallel to a longitudinal direction of each opening of the polarization conversion element.

Abstract: An optical element has layers formed on a substrate, including alternating first and second layers having first and second refractive indices, nL and nH that exhibit a spectral characteristic, providing, for incident light at a predetermined wavelength and directed toward the optical element within a range of angles bounded by first and second incident angles ?1 and ?2, between 0 and 80 degrees and differing by at least 1 degree, substantially linear polarization-averaged attenuation of the incident light energy wherein, for any incident angle ?n between ?1 and ?2, A?n is the corresponding polarization-averaged attenuation, and wherein the polarization-averaged attenuation at A?n at angle ?1 is less than or equal to an optical density value of 0.2 and the polarization-averaged attenuation A?n at angle ?2 exceeds an optical density value of 4.

Abstract: An illumination system and a projection apparatus adopting the illumination system are provided. The projection apparatus comprises the illumination system and a light modulator. The illumination system comprises at least one light source, a curved reflecting component, a phosphor wheel, a polarizer and a half wave retarder. The light provided by the at least one light source passes through the curved reflecting component and the phosphor wheel to provide a first light in a first time sequence and a second light in a second time sequence. The first light and the second light are transformed into a first polarized light and a second polarized light respectively in different time sequences by the polarizer and the half wave retarder.

Abstract: A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized.

Abstract: A LCOS projection system includes an illumination device, a LCOS microdisplay element, a polarization beam splitter, an optical projection lens, and a beam recycling module. A first portion of the lighting beams provided by the illumination device are transmissible through the polarization beam splitter and directed to the LCOS microdisplay element. A second portion of the lighting beams provided by the illumination device and from the polarization beam splitter are introduced into the beam recycling module. By the beam recycling module, a polarization state of the second portion of the lighting beams is converted. Consequently, the second portion of the lighting beams in the converted polarization state can also be projected onto the LCOS microdisplay element. The beam recycling module includes a total internal reflection prism, which is arranged in a transmission path of the first portion and the second portion of the lighting beams.

Abstract: Display devices with high dynamic ranges approaching the limitations of the human eye are discussed herein. High dynamic range projections systems may be 2D or 3D and devices may or may not be implemented with polarization preserving optics for high efficiency. In one embodiment, 2D HDR projection systems may compensate the modulator for varying transmission and contrast versus field of view. In another embodiment, 3D HDR projection systems may include a global or pixelated/segmented modulator. The global or pixelated/segmented modulator may be included in a stereoscopic polarization switch or in a polarization-preserving stereoscopic projection system. Additionally, a combination of global/global or pixelated/pixelated, or global/pixelated modulators may be used.

Abstract: Provided is an illumination device that includes: light source (101); light guiding means (102) where light from light source (101) is supplied to one end surface, and light incident from the one end surface is propagated inside to exit from the other end surface; illuminating optical systems (103, 104, 106, and 107) that spatially separate a luminous flux output from the other end surface of light guiding means (102) into a plurality of luminous fluxes and that form, on display element (110), an optical image formed on the other end surface of light guiding means (102); reflective polarizing plate (109) that is located between illuminating optical systems (103, 104, 106, and 107) and display element (110) and that transmits first polarized light while reflecting second polarized light different in polarized state from the first polarized light toward illuminating optical systems (103, 104, 106, and 107); reflecting element (105) that is disposed at a position where the plurality of luminous fluxes are spatia

Abstract: Provided is a light-emitting element having high luminance and high directivity and emitting light in a controlled polarization state. The light-emitting element comprises substrate 3 and light emitting part 10 disposed on substrate 3 for emitting light in which light intensity of a polarization component in first direction x parallel to substrate 3 is higher than light intensities of polarization components in other directions. Light emitting part 10 includes active layer 12 for generating light and a plurality of structural bodies 14a disposed on a light-emitting side of light emitting part 10 with respect to active layer 12 and arrayed two-dimensionally along a surface substantially parallel to active layer 12. Each of structural bodies 14a has width w1 along first direction x and width w2 along second direction y perpendicular to first direction x, width w1 along first direction x and width w2 along second direction y being different from each other in a cross section parallel to active layer 12.

Abstract: Light source layer (4) includes substrate (10) and a pair of layers, namely, hole-transport layer (11) and electron-transport layer (13), formed on substrate (10). Directional control layer (5) includes plasmon excitation layer (15) stacked on a side of light source layer (4), which is opposite to the side of substrate (10) of light source layer (4), and which has a plasma frequency higher than a frequency of light output from light source layer (4), and wave vector conversion layer (17) stacked on plasmon excitation layer (15), which converts light incident from plasmon excitation layer (15) into light having a predetermined exit angle to output the light. Plasmon excitation layer (15) is sandwiched between low dielectric constant layer (14) and high dielectric constant layer (16).

Abstract: An illumination device includes an image element configured to convert light incident thereon to image light and to output the image light, a first light path extending to pass through the image element, and a second light path extending without passing through the image element. The first light path and the second light path are configured to project lights passing therethrough, respectively, on an object existing outside the illumination device.

Abstract: An optical device includes: a light transmissive first substrate; a light transmissive second substrate; a polarizing layer disposed between the first substrate and the second substrate; a first bonding layer which bonds the first substrate to the polarizing layer; and a second bonding layer which bonds the second substrate to the polarizing layer, wherein the first bonding layer is an adhesive layer, and the second bonding layer contains a structure of siloxane (Si—O) and a leaving group. By forming the first bonding layer of an adhesive layer, a necessary strength can be ensured, and also the optical properties can be enhanced by absorbing the irregularities of the polarizing layer formed of a synthetic resin so as to prevent the contamination with air bubbles. Since the time of exposure of the polarizing layer to heat generated by a plasma can be decreased, the polarizing layer is not deteriorated.

Abstract: A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized.

Abstract: Illumination device includes a light source (101); an illumination optical system (102, 103, 104, 106, 107) that spatially splits each of the plurality of color light beams emitted from the light source, superimposes the split light beams of each of the plurality of color light beams, and emits the superimposed light beams to a display element (110); a reflective polarization plate (109) that is arranged between the illumination optical system (102, 103, 104, 106, 107) and the display element (110) and that transmits first polarized light and reflects second polarized light whose polarization state is different from that of the first polarized light toward the illumination optical system (102, 103, 104, 106, 107); a reflection element (105) that is arranged at a position where each of the plurality of color light beams is spatially split by the illumination optical system and that transmits the split light beams of each of the color light beams and reflects, of the split light beams of each of the color light

Abstract: A system and method are disclosed for displaying different captions for selective viewing. A display is used for showing the captions in different color and/or polarization combinations, and color-selective filters and/or polarizers are used for separately viewing the individual captions.

Abstract: A polarization conversion element includes first light transmissive substrates and second light transmissive substrates each of which has a light incident surface and a light exiting surface and which are disposed alternately, polarization separation films, reflection films, and retardation plates. One of each of the polarization separation films and a plasma polymerization film is formed on a first surface of each of the first light transmissive substrate. Each of the reflection films is formed on a second surface of each of the first light transmissive substrate. An adhesive layer is formed on a first surface of each of the second light transmissive substrates. The other of each of the polarization separation films and the plasma polymerization films is formed on a second surface of each of the corresponding second light transmissive substrates.

Abstract: A projector includes a polarization conversion system and a reflective polarizer. The polarization conversion system receives unpolarized light including first S-polarized light and first P-polarized light, wherein the first S-polarized light passes through the polarization conversion system, a part of the first P-polarized light is converted into second S-polarized light after passing through the polarization conversion system, and another part of the first P-polarized light remains unchanged after passing through the polarization conversion system. The reflective polarizer allows the first S-polarized light and the second S-polarized light to pass through and reflects the first P-polarized light back to the polarization conversion system.

Abstract: A projector includes an illumination device having a light source device emitting light, and a polarization conversion element adapted to emit light from the light source device as polarized light, a light modulation device adapted to modulate the light from the illumination device in accordance with image information, and a projection optical system adapted to project the light from the light modulation device, and the illumination device further includes a light diffusing unit disposed in at least one of upstream and downstream of the polarization conversion element.

Abstract: Provided is an illuminating device that includes: first light guiding means (3) where light incident from one end surface is propagated inside to exit from the other end surface; illuminating optical system (1) that spatially separates a luminous flux from the other end surface of first light guiding means (3) into a plurality of luminous fluxes, and forms an optical image formed on the other end surface of first light guiding means (3) on display element (12); reflective polarizing plate (11) that is located between illuminating optical system (1) and display element (12), and transmits first polarized light while reflecting second polarized light different that is in polarized state from the first polarized light toward illuminating optical system (1); reflecting element (7) that is disposed at a position where the plurality of luminous fluxes are spatially separated, and that includes transmission regions through which the plurality of luminous fluxes are transmitted, and a reflecting film formed in a regi

Abstract: A hologram layer (13) is irradiated by light from an optical element (10). The hologram layer (13) is provided with a first hologram (14) that diffracts in a predetermined direction, from among incident light from the optical element (10), X-polarized light in which the polarization component is in a specific direction and emits the light as X-polarized light of a first phase state (P1), and a second hologram (15) that both diffracts in the same direction as the X-polarized light of the first phase state (P1) and moreover at an equal radiation angle, from among incident light from the optical element (10), Y-polarized light in which the polarization component is in a direction orthogonal to that of the X-polarized light and converts it to X-polarized light, and emits the light as X-polarized light of a second phase state (P2) that differs from the first phase state (P1).

Abstract: A color light mixing device, a color light mixing method and a small-sized projecting system using the color light mixing device are provided. The color light mixing device includes a tube structure, a plurality of light-emitting units, a reflective polarizer and a microlens assembly. The light-emitting units are located at an inlet end of the tube structure. The reflective polarizer is located at the other end of the tube structure. The microlens assembly is arranged between the light-emitting units and the reflective polarizer. By the color light mixing device, the light beams with a single polarization state are homogenized and outputted to a microdisplay element of the small-sized projecting system. By an optical projection lens assembly of the small-sized projecting system, an image shown on the microdisplay element is projected onto a screen.

Abstract: The invention relates to a lighting device (10), comprising a multistage lens (1, 2, 3), which spectrally and spatially collimates the transmitted light (5, 6). The illumination device is particularly well suited for use in a display unit.

Abstract: A projector includes a solid-state light source that emits linearly polarized light, a birefringence element that converts the linearly polarized light emitted from the solid-state light source into circularly or elliptically polarized light, a diffusion element that diffuses the light having exited from the birefringence element, and a polarization conversion element that separates the diffused light having exited from the diffusion element into first polarized light polarized in a first polarization direction and second polarized light polarized in a second polarization direction, converts the polarization direction of the first polarized light into the second polarization direction, and outputs the resultant first and second polarized light.