Abstract: A projector includes an illuminating device that emits an illuminating light beam; a liquid crystal device that modulates the illuminating light beam from the illuminating device in accordance with image information; a projection optical system that projects light modulated by the liquid crystal device; a polarizing plate arranged on at least one of a light incident side and a light emitting side of the liquid crystal device, and made of a polarizing layer; a liquid crystal device side light-transmissive member adhered to a surface of the liquid crystal device side in the polarizing layer of the polarizing plate; and an opposite side light-transmissive member adhered to a surface on the side opposed to the surface of the liquid crystal device side in the polarizing layer of the polarizing plate; wherein the liquid crystal device side light-transmissive member and the opposite side light-transmissive member are made of an inorganic material.

Abstract: A projector includes an illuminating device that emits an illuminating light beam; a liquid crystal device that modulates the illuminating light beam from the illuminating device in accordance with image information; a projection optical system that projects light modulated by the liquid crystal device; a polarizing plate arranged on at least one of a light incident side and a light emitting side of the liquid crystal device, and made of a polarizing layer; a liquid crystal device side light-transmissive member adhered to a surface of the liquid crystal device side in the polarizing layer of the polarizing plate; and an opposite side light-transmissive member adhered to a surface on the side opposed to the surface of the liquid crystal device side in the polarizing layer of the polarizing plate; wherein the liquid crystal device side light-transmissive member and the opposite side light-transmissive member are made of an inorganic material.

Abstract: A reflective mirror manufacturing method for manufacturing a reflective mirror used in an illumination device including an arc tube including a light-emitting portion and a reflective mirror including a reflective surface that reflects light from the light-emitting portion in a predetermined direction, includes: a first step of forming a tube by heating a tube including a material of the reflective mirror, thereafter putting the tube in a form block, applying internal pressure with an inert gas to cause a center portion of the tube to expand, so that part of an inner surface of the expanded center portion includes a shape corresponding to the reflective surface of the reflective mirror; a second step of cutting the tube at the center portion to form a reflective mirror member; and a third step of forming a reflective layer on an inner surface of the reflective mirror member.

Abstract: A reflective mirror manufacturing method for manufacturing a reflective mirror used in an illumination device including an arc tube including a light-emitting portion and a reflective mirror including a reflective surface that reflects light from the light-emitting portion in a predetermined direction, includes: a first step of forming a tube by heating a tube including a material of the reflective mirror, thereafter putting the tube in a form block, applying internal pressure with an inert gas to cause a center portion of the tube to expand, so that part of an inner surface of the expanded center portion includes a shape corresponding to the reflective surface of the reflective mirror; a second step of cutting the tube at the center portion to form a reflective mirror member; and a third step of forming a reflective layer on an inner surface of the reflective mirror member.

Abstract: A projector includes an illuminating device that emits an illuminating light beam; a liquid crystal device that modulates the illuminating light beam from the illuminating device in accordance with image information; a projection optical system that projects light modulated by the liquid crystal device; a polarizing plate arranged on at least one of a light incident side and a light emitting side of the liquid crystal device, and made of a polarizing layer; a liquid crystal device side light-transmissive member adhered to a surface of the liquid crystal device side in the polarizing layer of the polarizing plate; and an opposite side light-transmissive member adhered to a surface on the side opposed to the surface of the liquid crystal device side in the polarizing layer of the polarizing plate; wherein the liquid crystal device side light-transmissive member and the opposite side light-transmissive member are made of an inorganic material.

Abstract: An optical modulator holder (4402) has an optical modulator holding unit (4405) having a substantially rectangular U-shaped cross-section and made of heat-conductive material, a plate-like member (4406) made of heat-conductive material, and an optical modulator cooling unit (4407) constituted by a hollow member which is capable of enclosing cooling fluid inside and is made of heat-conductive material. Of the optical modulator holding unit (4405) and the plate-like member (4406), peripheries of openings (4405A1, 4406A) each contact heat-transferably a liquid crystal panel (441). The liquid crystal panel (441) is held inside the rectangular U-shape of the optical modulator holding unit (4405). The optical modulator cooling unit (4407) is formed like a ring whose inner side surface heat-transferably contacts the liquid crystal panel (441), and has an inlet port (4407D) and outlet port (4407E).

Abstract: The light source device 10A has a light-emitting tube (11) (radial light source) and a reflector (12A). A cylindrical heat-conductive member (14A) is attached on an outer surface of a first sealing portion (114A) near a neck portion (121A) of a reflector (12A) in sealing portions (114) of the light-emitting tube (11). The heat-conductive member (14A) is attached along the outer surface of the first sealing portion (114A) with an end thereof being extended to a section near a light-emitting portion (113). A heat-radiation fin (15A) is attached on the other end of the heat-conductive member (14A).

Abstract: An optical device (44) includes three optical modulators, three optical modulator holders (447), a plurality of fluid circulating members (440), a cross dichroic prism (444), a fluid branching section (446), a fluid feed-in section (449) and a fluid pressurizing/feeding section (445). The three optical modulator holders (447) are fitted respectively to the three light-incident surfaces of the cross dichroic prism (444) through three supporting members (448). The fluid feed-in section (449) is fitted to the top surface of the cross dichroic prism (444). The fluid branching section (446) and the fluid pressurizing/feeding section (445) are laid one on the other and fitted to the lower surface of the cross dichroic prism (444).

Abstract: A polarizer for converting incident light beam into a linear polarization light beam has a base plate of a material of low linear expansion coefficient, high thermal conductivity or low photoelastic constant, a birefringent portion formed by arranging minute metal concave thread on a surface of light-emission side of the base plate in stripe, and a protection plate covering the birefringent portion and made of the same material as the base plate, the base plate and the protection plate being bonded by an elastic adhesive on the periphery thereof so that the birefringent portion is sealed and enclosed by the protection plate and the elastic adhesive.

Abstract: An illumination optical device is provided with a light source device and a uniform illumination optical system. To a light flux emission side of an expanded portion of the light source lamp of the light source device, which is opposite to a reflector of the illumination optical device, a reflection member is provided. An effective reflection plane diameter of an elliptical reflector of the light source device is 30 mm or more but 50 mm or less, Furthermore, assuming that a first focal distance of the elliptical reflector is f1, and a second focal distance thereof is f2, f1 becomes equal to or more than 5 mm, but equal to or less than 50 mm, and f2/f1 becomes in a range from 4 to 7 inclusive.

Abstract: In a light source device (10), relations of ?1?Tan?1 (Hd/(2f1)) and T1<H?Hd are established, where a diameter of a circle defining an edge on the neck (121) side of a usable-light reflection area in a reflecting portion (122) of a main reflecting mirror (12) is Hd, a distance between the edge on the neck (121) side of the usable-light reflection area of the reflecting portion (122) of the main reflecting mirror (12) and an emitting center O of an emitting portion (1111) in a central axis direction of the light beam irradiated from the light source device (10) is f1, an opening diameter of a base end in an extending direction of the neck (121) is H, a diameter of sealing portion (1112, 1113) is T1, and an angle formed by lines connecting inflection points (IP1) between the emitting portions (1111) and the sealing portion (1112) with the emitting center of the emitting portion (1111) and the central axis of the light beam irradiated from the light source device (10) is ?1.

Abstract: An axial-flow fan has a plurality of main fins (702), and auxiliary fins (703) provided between the main fins (702), where the position of a front end of the auxiliary fin (703) relative to X axis and the position of a front end of the main fin (702) adjoining the auxiliary fin in reverse-rotary direction are aligned, the height of the auxiliary fin (703) is approximately three fourths of the height of the main fin (702), and the cross sections of the main fin (702) and the auxiliary fin (703) taken along the axial direction of the main shaft are streamlined.

Abstract: A color-separating optical device (30) included in an optical device (3) separates light beam irradiated from an illumination optical device (20) into three color lights of red, green and blue. The optical device (3) includes a concave lens (50) that is disposed in an optical path of the blue light having geometric length identical with that of the green light among optical paths of the three color lights extended from the illumination optical device (20) to the respective liquid crystal panels (42R, 42G, 42B), and adapted to correct an chromatic-aberration between the green light and blue light caused by the illumination optical device (20).

Abstract: An optical modulator holder (4402) has an optical modulator holding unit (4405) having a substantially rectangular U-shaped cross-section and made of heat-conductive material, a plate-like member (4406) made of heat-conductive material, and an optical modulator cooling unit (4407) constituted by a hollow member which is capable of enclosing cooling fluid inside and is made of heat-conductive material. Of the optical modulator holding unit (4405) and the plate-like member (4406), peripheries of openings (4405A1, 4406A) each contact heat-transferably a liquid crystal panel (441). The liquid crystal panel (441) is held inside the rectangular U-shape of the optical modulator holding unit (4405). The optical modulator cooling unit (4407) is formed like a ring whose inner side surface heat-transferably contacts the liquid crystal panel (441), and has an inlet port (4407D) and outlet port (4407E).

Abstract: An optical device (44) includes three optical modulators, three optical modulator holders (447), a plurality of fluid circulating members (440), a cross dichroic prism (444), a fluid branching section (446), a fluid feed-in section (449) and a fluid pressurizing/feeding section (445). The three optical modulator holders (447) are fitted respectively to the three light-incident surfaces of the cross dichroic prism (444) through three supporting members (448). The fluid feed-in section (449) is fitted to the top surface of the cross dichroic prism (444). The fluid branching section (446) and the fluid pressurizing/feeding section (445) are laid one on the other and fitted to the lower surface of the cross dichroic prism (444).

Abstract: This invention provides a technique of reducing temperature rise due to heat generation of polarization control elements. A projector includes: an illumination optical system; an electro-optical device for modulating light from the illumination optical system in response to image information; a projection optical system for projecting modulated light obtained with the electro-optical device and a base frame, formed using material including metal material, for mounting a plurality of optical components arranged on an optical path from the illumination optical system to the projection optical system. At least one of the plurality of optical components is a polarization control component that includes: a polarization control element including organic material for the controlling polarization state of light exiting from the polarization control element; and a light-transmissive member having a thermal conductivity of at least about 0.8 W/(m·K), to which the polarization control element is stuck.

Abstract: The present invention provides an optical device that achieves reduction in size, reduction in manufacturing costs, improved image quality, and so forth, by simplification and the like of a panel in prisms (POP) structure wherein light-modulating devices and a color synthesizing optical element are integrally formed. A POP structure is configured wherein pins integrally formed with a holding member are inserted through holes formed in the four corners of holding frames storing the liquid crystal panelsso as to fix the holding frames and holding members by adhesion. End faces of holding members opposite to the pins are fixed by adhesion to the side faces of bases fixed on the upper and lower faces of a cross-dichroic prism.

Abstract: An illumination device of the invention is an illumination device 100A including an ellipsoidal reflector 130, an arc tube 120, a sub-mirror 122, and a parallelizing lens 140A, which is characterized in that on a light incident-surface 140Ai of the parallelizing lens 140A is formed a reflection reducing layer 142A optimized to match with a light, which is, of the lights emitted from a luminescent center P of the arc tube 120, a light that is emitted toward the ellipsoidal reflector at any angle of 60° to 80° with respect to an illumination optical axis 100Ax and goes incident on the light incident-surface 140Ai of the parallelizing lens 140A after the light is reflected on the ellipsoidal reflector 130. The illumination device of the invention is thus able to further improve efficiency of light utilization as well as further reduce unwanted stray lights by further reducing overall reflectance of the light incident-surface or the light exiting-surface of the parallelizing lens.

Abstract: A method of manufacturing an internal grooved tube according to the present invention includes the steps of inserting a grooved plug into a blank tube rotatably, and then pressing the blank tube against the outside surface of the grooved tube with several balls revolving both around the circumference of the blank tube and on its axis in location of the grooved plug inserted, while drawing out the blank tube longitudinally in one direction, wherein the number of balls is limited to 2 to 3. A lead angle ? of the grooves to the tube axis is preferably limited to 26 to 45 degrees.

Abstract: A projection-type display apparatus in accordance with the invention reduces the margin formed around the image forming range of the light valves, and forms a bright projected image. Emitted light from a light source lamp unit of a projection-type display apparatus illuminates liquid crystal light valves of each color via an integrator optical system. First and second lens plates of an integrator optical system that serves as a uniform illuminating optical system are disposed such that the attachment position thereof is capable of fine adjustment in a direction vertical to the optical axis. By performing fine adjustment of the attachment position of these, the forming position of the illumination range B can be adjusted to include the image forming range A of the liquid crystal light valves. Accordingly, there is no need to provide a wide margin around the image forming range A, taking shifting of the forming position of the illumination range B into consideration.