Abstract: A projection-type display device includes a first collimator lens configured to collimate a plurality of laser beams of a first wavelength, a first condenser lens, a second collimator lens configured to collimate a plurality of laser beams of a second wavelength, a second condenser lens, a light diffusing element, a first integrator illumination system configured to superimpose the laser beams of the first wavelength to form a rectangular irradiation region for the first wavelength, a second integrator illumination system configured to superimpose the laser beams of the second wavelength to form a rectangular irradiation region for the second wavelength, a first deflection unit, a second deflection unit, a transfer optical system configured to transfer the rectangular irradiation region for the first wavelength and the second wavelength to a reflective light modulation element, and a projection lens configured to project image light.

Abstract: A projection display device includes a plurality of semiconductor lasers, a collimating lens, an integrator illumination system, a deflection element, a transfer optical system, and a projection lens. The collimating lens is configured to collimate a plurality of laser beams output from the plurality of semiconductor lasers. The integrator illumination system is configured to overlap the plurality of laser beams collimated by the collimating lens to form a rectangular illumination region. The deflection element is disposed at a position closer to the collimating lens than a position where the rectangular illumination region is formed by the integrator illumination system. The transfer optical system is configured to enlarge and transfer the rectangular illumination region deflection-scanned by the deflection element to a reflective optical modulation element. The projection lens is configured to project video light output from the reflective optical modulation element.

Abstract: A projection display device includes a plurality of semiconductor lasers, a collimating lens, an integrator illumination system, a deflection element, a transfer optical system, and a projection lens. The collimating lens is configured to collimate a plurality of laser beams output from the plurality of semiconductor lasers. The integrator illumination system is configured to overlap the plurality of laser beams collimated by the collimating lens to form a rectangular illumination region. The deflection element is disposed at a position closer to the collimating lens than a position where the rectangular illumination region is formed by the integrator illumination system. The transfer optical system is configured to enlarge and transfer the rectangular illumination region deflection-scanned by the deflection element to a reflective optical modulation element. The projection lens is configured to project video light output from the reflective optical modulation element.

Abstract: A light source device for a projection display apparatus includes a phosphor, an excitation light source, a surface-curved dichroic mirror having a curved surface in which a side on which excitation light is incident is convexly curved, and a converging lens between the surface-curved dichroic mirror and the phosphor. The excitation light source is configured to output the excitation light for exciting the phosphor. The surface-curved dichroic mirror is configured to cause the excitation light from the excitation light source to be reflected on the curved surface and fluorescence from the phosphor to pass through the curved surface. The surface-curved dichroic mirror neither substantially converges nor substantially diverges the light that passes through, but performs a diverging operation on the excitation light that is reflected on the curved surface so as to form a virtual image.

Abstract: A light source device for a projection display apparatus includes a phosphor, an excitation light source, a surface-curved dichroic mirror, and a converging lens. The excitation light source is configured to output excitation light for exciting the phosphor. The surface-curved dichroic mirror has a curved surface and is configured to cause one of the excitation light from the excitation light source and fluorescence from the phosphor to pass through the curved surface and to cause the other of the excitation light and the fluorescence to be reflected on the curved surface. The surface-curved dichroic mirror is configured to cause the one of the excitation light and the fluorescence that passes through, neither to substantially converge, nor to substantially diverge, but converge the other of the excitation light and the fluorescence that is reflected.

Abstract: A light source device for a projection type display apparatus includes a phosphor, an excitation light source, a surface-curved dichroic mirror having a curved surface in which a side on which the excitation light is incident is convexly curved, and a converging lens positioned between the surface-curved dichroic mirror and the phosphor. The excitation light source configured to output excitation light for exciting the phosphor. The surface-curved dichroic mirror configured to cause excitation light from the excitation light source to be reflected on the curved surface and fluorescence from the phosphor to pass through the curved surface. The surface-curved dichroic mirror neither substantially converges nor substantially diverges the light that passes through, but performs a diverging operation on the excitation light that is reflected on a curved surface to form a virtual image.

Abstract: A light source device for a projection type display apparatus includes a phosphor, an excitation light source, a surface-curved dichroic minor, and a converging lens. The excitation light source configured to output excitation light for exciting the phosphor. The surface-curved dichroic minor has a curved surface and configured to cause one of excitation light from the excitation light source and fluorescence from the phosphor to pass through the curved surface and to cause the other to be reflected on the curved surface. The surface-curved dichroic mirror causes the light that passes through, neither to substantially converge, nor to substantially diverge, but performs a converging operation on the light that is reflected.

Abstract: A projection optical system includes first and second optical systems. The first optical system includes a transmissive-refractive element and the second optical system includes a reflective-refractive element. An image formed by a spatial light modulator is projected by the projection optical system on a projection surface. A light beam that travels along an optical path that leads from the second optical system to the projection surface in an optical path between a center of the image formed by the spatial light modulator and the projection surface is projected at an angle with respect to a normal to the projection surface. An optical axis of the first optical system is folded to a folded position by an optical path deflecting unit in an area of the first optical system where the light beam entering the optical path deflecting unit is a converging light beam or a substantially parallel light beam.

Abstract: A projection optical system includes first and second optical systems. The first optical system includes a transmissive-refractive element and the second optical system includes a reflective-refractive element. An image formed by a spatial light modulator is projected by the projection optical system on a projection surface. A light beam that travels along an optical path that leads from the second optical system to the projection surface in an optical path between a center of the image formed by the spatial light modulator and the projection surface is projected at an angle with respect to a normal to the projection surface. An optical axis of the first optical system is folded to a folded position by an optical path deflecting unit in an area of the first optical system where the light beam entering the optical path deflecting unit is a converging light beam or a substantially parallel light beam.

Abstract: A projection optical apparatus capable of providing high image quality and having a reduced size is disclosed. The projection optical apparatus includes a light valve and a projection optical system including a first optical system having a transmissive-refractive element and a second optical system having a reflective-refractive element. An image formed on the light valve is projected by the projection optical system on a projection surface. The optical axis in the first optical system is folded both vertically and horizontally. The first group of the first optical system is contained in a space (dead space) whose lower limit is defined by a lower edge of the second optical system, thereby reducing the depth of the apparatus.

Abstract: A projection optical apparatus capable of providing high image quality and having a reduced size. The projection optical apparatus comprises a light valve and a projection optical system including a first optical system (5) having a transmissive-refractive element and a second optical system (3?) having a reflective-refractive element. An image formed on the light valve is projected by the projection optical system on a projection surface (4). The optical axis in the first optical system (5) is folded both vertically and horizontally. The first group (5A) of the first optical system is contained in a space (dead space) whose lower limit is defined by a lower edge of the second optical system (3?)/thereby reducing the depth of the apparatus.

Abstract: An optical system is disclosed, including: an optical deflecting array including a plurality of optical deflecting devices arranged in a two-dimensional array, each of optical deflecting devices displacing a member having an optical reflection area and deflecting light, so that an incoming light flux entering the optical reflection area is deflected to a reflection direction being changed, a light source illuminating the optical deflecting array, and a projection lens projecting reflected light from the optical deflecting array based on color information. Each of the optical deflecting devices deflects light to two-axis directions, incoming light fluxes having different colors enter each of the optical deflecting devices from two directions respectively corresponding to two deflection axes, and are reflected by each of the optical deflecting devices based on the color information; and each of reflected light fluxes is led to the projection lens for a respective arbitrary time.

Abstract: An optical system is disclosed, including: an optical deflecting array including a plurality of optical deflecting devices arranged in a two-dimensional array, each of optical deflecting devices displacing a member having an optical reflection area and deflecting light, so that an incoming light flux entering the optical reflection area is deflected to a reflection direction being changed, a light source illuminating the optical deflecting array, and a projection lens projecting reflected light from the optical deflecting array based on color information. Each of the optical deflecting devices deflects light to two-axis directions, incoming light fluxes having different colors enter each of the optical deflecting devices from two directions respectively corresponding to two deflection axes, and are reflected by each of the optical deflecting devices based on the color information; and each of reflected light fluxes is led to the projection lens for a respective arbitrary time.