Abstract: A projection optical system (6) comprises a relay optical system (61), a PBS prism (71), and two projection lenses (81). The image light beam from a DMD (5) enters the PBS prism (71) via the relay optical system (61), is polarization-split there, and is directed to a screen by means of the two projection lenses (81). Displaying an image by means of the DMD (5) is controlled while the polarized states of the light beams produced by the polarization split by means of the PBS prism (71) are controlled. Thereby, a three-dimensionally viewable image and a high-resolution image created by pixel-offset can be projected. Since the relay optical system (61) is provided, the lens backs of the projection lenses (81) can be shortened, and the projection lenses (81) and further the projection optical system (6) can be made compact.

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: A projector producing an imaginary input plane with high operability is provided. A projector according to an embodiment projects a VUI screen picture onto a desk, and projects a main projection screen picture to a wall. The projector includes a light receiving element. The light receiving element is arranged in a position where light emitted toward the desk (VUI screen picture) and reflected (or scattered) by an object near the desk enters. The projector calculates a position of the object based on light sensing timing by the light receiving element and light scan positions at various points in time. The projector changes a projected screen picture when it determines that object is simultaneously in contact with a plurality of portions of the VUI screen picture and at least one of contact positions moves.

Abstract: A reflective liquid crystal projector according to the aspect of the invention includes a light source, a reflective liquid crystal panel, and a wire grid polarization beam splitter element. The wire grid polarization beam splitter element is provided with a polarization beam split surface that reflects a first polarized light component and transmits a second polarized light component. The reflective liquid crystal projector also includes a projection optical system that projects the first polarized light component, and an aperture stop that is disposed on an optical path of the light beam emitted from the light source. The aperture stop limits the amount of first light more than that of second light. The first light is divergent from the reflective liquid crystal panel to the polarization beam split surface. The second light is divergent from the reflective liquid crystal panel to the polarization beam split surface.

Abstract: A projection display apparatus includes a polarization beam splitter, a first phase compensation plate including two layers, and a light modulator. Each layer has a constant axial angle, and an optical axis of each layer inclines with respect to the x axis in an xz plane. The axial angle of the layer closer to the polarization beam splitter among the two layers is larger than the axial angle of the layer farther from the polarization beam splitter. 20°??max??min?80° is satisfied where ?max is a maximum value of the axial angle and ?min is a minimum value of the axial angle. 40°??ave?70° is satisfied where ?ave is an average value of axial angles of the two layers.

Abstract: A multi-projection system and a display system using the same are provided. The multi-projection system for projecting a plurality of images included in a beam onto a screen includes a beam source providing the beam; an image splitter in proximity to the beam source and has a positive magnifying ratio; and an imaging device in proximity to the image splitter, wherein the beam passes through the image splitter and the imaging device to be projected onto the screen.

Abstract: A DLP optical structure and corresponding method of controlling it are described including an optical integrator system having an optical integrator, a relay lens system, a TIR prism assembly, a digital imager, and a projection lens, said optical structure being adapted to accept a polarized light beam, said DLP optical structure comprising: at least one retarder positioned after said optical integrator for controlling the polarization state throughout said DLP optical structure, and achieving the desired polarization state after said projection lens; wherein said desired polarization state is substantially linear or circular. A DLP optical structure is also described including an optical integrator, a relay lens system, a TIR prism assembly, a digital imager and a projection lens, wherein the integrator is a fly-eye integrator for maintaining an input polarization of a light beam, and wherein said input polarization is linear or circular.

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: A display structure includes a liquid crystal module, and a light guide layer arranged on a surface of the liquid crystal module, first light-emitting devices arranged at an edge of one end portion of the light guide layer, and a transmittance-controllable layer arranged on a surface of the light guide layer opposing the liquid crystal module. The light-emitting devices are configured to emit light into the light guide layer, and thus the light emitted by the light-emitting devices is transmitted within the light guide layer. The transmittance-controllable layer may have light transmittance characteristics which change depending on an external stimulus applied thereto.

Abstract: In a light source device, that obtains high light usage efficiency by projecting simultaneously two or more of three primary color lights X, Y and Z. Moreover, each color light X, Y and Z is divided into two in terms of time so that p-wave and s-wave linear polarization lights are formed, such that the synthesized light of the p-wave linear polarization lights enters a first spatial modulation element and the synthesized light of the s-wave linear polarization lights enters a second spatial modulation element to permit gradation control of each color light.

Abstract: A polarizing element includes a transparent substrate, a reflective layer constituting, on the transparent substrate, grid-shaped convexities arrayed at a pitch smaller than a wavelength in a used optical bandwidth, a dielectric layer formed on the reflective layer, a diffusion barrier layer formed on the dielectric layer, and an absorbing layer formed on the diffusion barrier layer such that the diffusion barrier layer is sandwiched between the absorbing layer and the dielectric layer. This polarizing element has an excellent optical property and is able to prevent mixing of the absorbing layer and the dielectric layer under a high temperature.

Abstract: A projection apparatus includes a color synthesis section, a polarization conversion section, and a projection lens. The color synthesis section is configured to combine light in three primary colors of red light, green light, and blue light and emit combined light. The polarization, conversion section includes a first polarization conversion member having a slow axis with an angle other than angles of 0°, 90°, 180°, and 270°, and a second polarization conversion member having a slow axis with an angle that is opposite, to the slow axis of the first polarization conversion member by 180°. The projection lens is configured to emit light output from the polarization conversion section.

Abstract: A projector is provided with an image forming device, a light path switching element, a polarization control element, and a polarization plate. The image forming device emits first image light and second image light. The light path switching element shifts a light path of the first image light and a light path of the second image light from each other. The polarization control element controls a polarization direction of the first image light to have a first polarization direction in a first display period, controls polarization directions of the first image light and the second image light to have a second polarization direction different from the first polarization direction in a transition period, and controls the polarization direction of the second image light to have the first polarization direction in a second display period. The polarization plate is disposed on the light exit side of the polarization control element.

Abstract: An illumination system, a projection device, and an illumination method are provided. The illumination system includes a polarized light source, a polarization switching element, a beam splitting element, a wavelength conversion element, a reflective element, and a wave plate. The polarized light source emits a polarized light beam with a first color. The polarization switching element switches a polarized direction of the polarized light beam at different time points. The beam splitting element separates polarized light beams having different polarized directions. The wavelength conversion element converts the polarized light beam having a first polarized direction to a converted light beam. The reflective element reflects the polarized light beam having a second polarized direction to form a reflected light beam. The beam splitting element combines the converted light beam and the reflected light beam comes from the wave plate disposed between the beam splitting element and the reflective element.

Abstract: A polarization separating element is configured to include a translucent substrate formed of a crystal material having birefringent properties and optically rotatory power and a polarization separating portion formed on the incidence-side surface of the translucent substrate so as to transmit a P-polarized light beam and reflect an S-polarized light beam. A reflecting element that reflects the S-polarized light beam reflected by the polarization separating portion is disposed so as to be separated approximately in parallel to the translucent substrate. A predetermined function is set such that the P-polarized light beam having passed through the polarization separating portion and been incident to the translucent substrate is converted so as to be parallel to the polarization plane of the S-polarized light beam so that the P-polarized light beam is output as the S-polarized light beam.

Abstract: A projection type display apparatus includes: an illumination optical system which has a first array lens and a second array lens each of which has a plurality of lens elements having a plurality of rectangular shape openings and arranged in a matrix form; an illumination light source device which has one or more light sources having a polarization degree not smaller than 50% and one or more polarizers for transmitting one type polarized light and reflecting other type polarized light. At least one set of the light sources are arranged so that the polarization directions of light fluxes having high polarization degrees may be perpendicular to each other, the light fluxes are combined by the polarizer, condensed to a single region by a light-flux condensing element, and then directed toward another illumination optical system located in a subsequent stage.

Abstract: Disclosed is a projector, the projector including a light source, an illumination unit illuminating light incident from the light source, and a display device enabling to realize an image by receiving the light irradiated from the illumination unit, and whose center is positioned at an axis different from an optical axis of the illumination unit.

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: A projector includes an illuminating system and an imaging system. The illuminating system includes a light source module, a lens array, a condenser lens and a display panel, in which light beams are generated by the light source module, uniformly dispersed by the lens array, condensed by the condenser lens, and reflected by the display panel to obtain image light, and the condenser lens has an effective focal length substantially equal to a product of an f-number of the illuminating system and a thickness of the lens array. The imaging system outwardly projects the image light.

Abstract: A light combiner having a polarization separation film and transmitting P-polarized light from a first light source unit whereas reflecting S-polarized light from a second light source unit forms combined light, and the angle of incidence of the light from the first light source unit and the angle of incidence of the light from the second light source unit with respect to the polarization separation film are each greater than 45°.

Abstract: In various embodiments, a projection device is provided. The projection device may include a light generator for generating primary light by means of at least one light source; at least one carrier having a plurality of transmitted-light regions, the front sides of which can be irradiated by the primary light and the rear sides of which emit light, which transmitted-light regions have at least one first transmitted-light region which contains luminophore and the front side of which can be illuminated by the primary light and the rear side of which emits wavelength-converted secondary light; and at least one deflection mirror for deflecting the primary light of the light generator onto a respective transmitted-light region; wherein the transmitted-light regions have at least one further, wavelength-invariant transmitted-light region.

Abstract: An image engine and a projection system with two discrete format channels are described. The engine comprises a spatial light modulating system in each channel and a combining layer. A specific arrangement of the modulators of the two spatial light modulating systems relative to the combining layer makes it possible that one modulating system generates a landscape format image while the second modulating system generates a portrait format image in a common output path. In the projection system, a control logic addresses either the landscape channel or the portrait format channel or both channels, depending either on the format of the incoming image data, or on external controls.

Abstract: A light source apparatus includes a polarization conversion element, a fluorescent substance and a light source element. The polarization conversion element has a p/s-polarizing beam splitter film to separate polarization components of incident light into p-polarization component and s-polarization component. The fluorescent substance emits visible light as the incident light that is incident on the p/s-polarizing beam splitter film, which visible light is generated by that the fluorescent substance is excited by excitation light, and has a wavelength of longer wavelength region than a wavelength of the excitation light. The light source element emits a laser beam having a predetermined wavelength as the excitation light to irradiate the fluorescent substance with the excitation light so that a laser beam having a polarization plane between the polarization plane of p-polarized light and the polarization plane of s-polarized light exiting from the fluorescent substance is emitted as the incident light.

Abstract: A beam combiner has a first coating on a first side capable of imparting a first polarization rotation, and a second coating on a second side capable of imparting a second polarization rotation. A first beam impinging on the first side passes through the first and second coatings as a first beam component. Second and third beams impinging on the second side partially reflect off the second coating as a second beam component, and partially transmit through the second coating to reflect off the first coating and exit through the second coating as a third beam component. The first, second and third beam components are disposed at selected positions and have respective selected polarizations as a combined beam spot. The positions and polarization of the beams components result in a projected image having increased allowable brightness and/or having reduced speckle.

Abstract: Device for generating polarized electromagnetic radiation has a diffuser and a polarizer. The diffuser is arranged in a beam path of the electromagnetic radiation. The polarizer is arranged in the beam path of the electromagnetic radiation, to be precise downstream of the diffuser in the direction of propagation of the electromagnetic radiation. The polarizer has a reflective side facing the diffuser, said reflective side being at least partly reflective to the electromagnetic radiation. The polarizer transmits electromagnetic radiation having a predefined polarization and reflects electromagnetic radiation not having the predefined polarization back to the diffuser. The diffuser scatters, in a non-polarization-maintaining manner, at least one portion of the reflected-back electromagnetic radiation not having the predefined polarization.

Abstract: The disclosure generally relates to refractive polarization converters, polarized color combiners using the refractive polarization converters, and in particular polarized color combiners using the refractive polarization converters that can be useful in small size format projectors such as pocket projectors. The disclosed refractive polarization converters include at least one birefringent prism that can separate an unpolarized light beam into divergent polarized light beams having orthogonal polarization directions.

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 combination structure for adjusting the clearance of projected images includes a micro projecting panel, a micro projector body, an elastic spring, a quarter wave plate set and an adjusting screw. The micro projecting panel is arranged at the peripheral of a projecting window of the micro projector body. The quarter wave plate set is inserted into an adjusting groove of the micro projector body. A supporting arm of the quarter wave plate set is arranged in an axial hole of the micro projector body. The elastic spring and the adjusting screw are arranged into the axial hole of the micro projector body. The adjusting screw is adjusted for finely adjusting the space between the quarter wave plate set and the micro projecting panel. By applying the combination structure, the clearance of projected images can be improved.

Abstract: A projection image display apparatus includes: a light source; an illumination optical system that uniformly irradiates a surface of an image modulation element serving as a primary image surface with a light beam emitted from the light source; and a projection optical system that enlarges and projects image information on the primary image surface modulated by the image modulation element onto a screen serving as a secondary image surface, and that includes a first optical system that forms an intermediate image from the image information, a single-image second optical system that enlarges and projects the intermediate image to display a single image on the screen, a plural-image second optical system that enlarges and projects the intermediate image to display plural images on the screen, and an optical path switching mechanism that selectively guides a light beam from the first optical system to the single-image or plural-image second optical system.

Abstract: An image projection system having a laser projector that projects two differently polarized images on a display region is disclosed. The laser projector enables viewing the two differently polarized images as a three-dimensional image. The image projection system includes a planar lightwave circuit-based beam combiner that enables multiple colors of laser light having different polarization modes to be combined in a single output beam that is scanned over the display region at video rates to produce the two polarized images.

Abstract: A projector includes: a first solid-state light source device which includes a first solid-state light source emitting excitation light, and a fluorescent layer converting excitation light emitted from the first solid-state light source to light including a first color light component and a second color light component different from the first color light component, and emitting converted light; a second solid-state light source device which includes a second solid-state light source emitting a third color light component different from the first color light component and the second color light component; a light modulation device modulating the first color light component, the second color light component, and the third color light component in accordance with image information; and a projection optical system projecting the modulated light components from the light modulation device as a projection image.

Abstract: A projection apparatus for providing multiple viewing angle images is disclosed. The projection apparatus includes a light source module, a polarizing light splitting element, a first and a second reflective light valve and a light combining element. The polarizing light splitting element has a light incident surface, a first light exiting surface and a second light exiting surface. The light incident surface optically couples with the light source module, while the first and the second light exiting surfaces optically couple with the first and the second reflective light valves respectively. The light combining element optically couples to the reflective light valves. Further, the light source module sequentially provides a first light beam and a second light beam. The light beams are transferred via the polarizing light splitting element, the reflective light valves and the light combining element to provide at least four viewing angle images to the viewers.

Abstract: The present invention provides a projection display capable of realizing high contrast in a display image plane. The projection display includes a light source; a first light modulator modulating light from the light source on the basis of an input image signal, and generating a first image light; a second light modulator modulating the first image light on the basis of the image signal, and generating a second image light; and a projection lens projecting the second image light generated with the second light modulator.

Abstract: An optical device whose efficiency and luminance can be further highly improved is provided. The optical device includes carrier generation layer 11 that causes fluorescence to occur with incident light, plasmon excitation layer 12 that excites first surface plasmons with said fluorescence, carrier generation layer 11 being laminated on carrier generation layer 11, and exit layer 13 that extracts the first surface plasmons or light that occurs on an opposite surface of carrier generation layer 11 contact surface of plasmon excitation layer 12 to the outside. Carrier generation layer 11 contains metal particles that excite second surface plasmons with said incident light.

Abstract: Methods for operating a light source of a scanning laser projector to reduce speckle and image flicker in projected images are disclosed. The methods generally include projecting an image comprising a plurality of frames with a light source of the scanning laser projector. Simultaneously, a speckle reduction sequence comprising uncorrelated speckle patterns and partially correlated speckle patterns is projected with the light source of the scanning laser projector. The speckle reduction sequence is projected by varying a property of an output beam of the light source of the scanning projector. The duration of the speckle reduction sequence may be less than about 0.04 seconds or from about 0.07 seconds to about 0.13 seconds.

Abstract: A projection type display apparatus includes: an illumination optical system which has a first array lens and a second array lens each of which has a plurality of lens elements having a plurality of rectangular shape openings and arranged in a matrix form; an illumination light source device which has one or more light sources having a polarization degree not smaller than 50% and one or more polarizers for transmitting one type polarized light and reflecting other type polarized light. At least one set of the light sources are arranged so that the polarization directions of light fluxes having high polarization degrees may be perpendicular to each other, the light fluxes are combined by the polarizer, condensed to a single region by a light-flux condensing element, and then directed toward another illumination optical system located in a subsequent stage.

Abstract: Provided is a polarizing element having excellent optical properties and high light resistance to intense light. This polarizing element is provided with a transparent substrate, an absorbing layer disposed on the transparent substrate and constituting grid-shaped convexities arrayed at a pitch smaller than the wavelengths in the optical bandwidth used, a dielectric layer formed on the absorbing layer, and a reflective layer formed on the dielectric layer. Because the absorbing layer, which interferes with and absorbs light, is in contact with the transparent substrate, heat dissipation can be improved and heat resistance of the polarizing plate can be improved.

Abstract: An illumination device includes a laser light source, and a polarization control device configured to control a polarization state of laser light emitted thereon from the laser light source, and to output light having at least two different polarization states.

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: A projector includes a liquid crystal light valve to which the image data is written in a line sequential manner, a polarization switching element for switching between the first and second polarization states throughout the switching areas in a line sequential manner, and a birefringent optical element for changing the light path of the incident light in accordance with the polarization state thereof. The boundary position between the switching areas of the first and second polarization states moves in sync with the boundary position between the first and second image data writing areas corresponding to the first and second sub-frame.

Abstract: A laser-based imaging system (200) is configured to reduce perceived speckle in images (201). The imaging system (200) includes one or more laser sources (207), a light modulator (204) configured to produce the images (201) with light (205) from the laser sources (207), and one or more active polarization switches (206) disposed in an optical path of the imaging system (200). The active polarization switch (206) is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners (991,992) may be used to help optimize speckle reduction.

Abstract: A 3D display system using a planar sheet of mist or water droplets as a rear projection screen. The system includes a screen generation assembly with a nozzle configured to convert supply water into a screen of water droplets. The screen is substantially planar and has a front surface facing a viewing area and an opposite rear surface. The display system includes a projection assembly projecting 3D content onto the rear surface. The projection assembly includes a first projector projecting left eye images and a second projector projecting right eye images. The 3D content may be provided using polarization or other 3D technology. For example, the first projector includes a first interference filter and the second projector includes a second interference filter differing from the first interference filter, whereby the left and right eye images are presented concurrently on the rear surface with differing bands of the visible color spectrum.

Abstract: A concealing structure to at least partially conceal a sensor, light emitter or other component by at least partially preventing reflection of external light by an underlying structure. In some examples, this function is performed by a two-component masking assembly, the masking assembly including a linear polarizer to cause linear polarization of light which passes from the exterior of the device to an underlying component, and a wave plate to shift the axis of any reflected polarized light. In many cases, a high density optical fluid will further be included within the masking assembly to minimize reflections from the other components of the assembly.

Abstract: In a projection display device, a polarization converting element is provided between an imager and a refracting optical system for converting a polarization direction of light after modulation into a direction radially extending from the center of the optical axis of the refracting optical system. Light transmitted through the polarization converting element is incident onto the refracting optical system in a state of P-polarized light or a state close to the state of P-polarized light. Thereby, the transmittance of light through the refracting optical system is made substantially uniform and increased.

Abstract: Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a one or more polarization conversion systems (PCS). Each PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. Each PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. Each PCS may receive light from a respective projector, and the PBS in each PCS may direct the light toward the first optical stacks. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to a second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light.

Abstract: A lighting optical includes a first light source for emitting first and second color lights and, and a second light source for emitting a third color light. The first light source includes a semiconductor laser element that emits a linearly polarized laser beam, an excitation light generation unit for spatially and temporally separating the laser beam from semiconductor laser element to generate first and second excitation lights and, a first phosphor that emits a first color light by first excitation light, and a second phosphor that emits a second color light by second excitation light. The excitation light generation unit includes a liquid crystal element that converts the incident laser beam into two lights orthogonal to each other in polarization direction, and a light space separation unit for spatially separating the two lights into first and second excitation lights and according to the difference between the two lights in polarization direction.

Abstract: An optical projection device comprises an imaging device adapted to generate a first and a second image in a first and a second light beam, respectively, a first converting device that is adapted to convert a polarization state of one of the first and the second light beams into a converted polarization state, so that the first and the second light beams are in different polarization states, and a relay lens that is adapted to generate an intermediate image, by superimposing the first and the second images. The relay lens comprises a combining device, that is adapted to combine the first and the second light beams. The optical projection device further comprises a projection lens that is adapted to project the intermediate image onto a screen.

Abstract: A projector apparatus includes: a polarization beam splitter block assuming a shape of a rectangular parallelepiped that includes two end surfaces and four side surfaces; a light source opposed to one of the side surfaces; an illumination optical system disposed between the light source and the polarization beam splitter block, which converts illuminating light to substantially parallel light so that is directed to the polarization beam splitter block; a reflection-type liquid crystal display element opposed to an illuminating light output surface, through which an illuminating light undergone polarization separation is output, and that includes a rectangular display area through which the illuminating light is modulated to modulated light output to the polarization beam splitter block; and a projection optical system that forms a projection image with the modulated light undergone polarization separation, wherein: shorter borders of the rectangular display area is set parallel to the end surfaces.

Abstract: A projector includes: a reflection type light modulation device which modulates received light according to image information and reflects the modulated light; a reflection type polarization plate which separates both of light supplied to the reflection type light modulation device and light modulated by the reflection type light modulation device into respective polarized lights; and a temperature measuring member which measures the temperature of the reflection type light modulation device, wherein the temperature measuring member is disposed in the rear side of the reflection type light modulation device.

Abstract: An image synthesizing device for a projector apparatus includes first, second, third polarizing beam splitters respectively provided for red light, green light, and blue light; and a light combining unit configured to combine and output the red light, the green light, and the blue light passing through the first, second, and third polarizing beam splitters. The first, second, and third polarizing beam splitters respectively include first, second, and third polarizing films. The first and second polarizing films where the red light and the green light enter are each formed of an organic material, and the third polarizing film where the blue light enters is formed of an inorganic material.