摘要:
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.
摘要:
A light source device, includes: a light source lamp that has a light emitting tube and a pair of electrodes, the light emitting tube including a discharge space; the pair of electrodes being disposed in the discharge space of the light emitting tube; a reflector in a substantially C-shape in cross section that reflects a light beam irradiated from the light source lamp; and an unused-light reflecting member being disposed on a light irradiation front side of the reflector and including an unused-light reflecting surface, the unused-light reflecting surface reflecting unused light irradiated outside the reflector of the light beam irradiated from the light source lamp, the unused-light reflecting surface being an ellipsoidal surface that has a first focal position on a light emission center of the light source lamp and a second focal position onto which the ellipsoidal surface reflects and converges the unused light to be guided to the outside of the light source device.
摘要:
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.
摘要:
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.
摘要:
A technique capable of easily manufacturing a projector without deteriorating too much the optical characteristics of the projector. A projector includes an illuminating optical system for emitting illumination light, an electro-optical device for modulating light from the illuminating optical system according to image information, and a projection optical system for projecting a modulated light beam flux obtained by the electro-optical device. The electro-optical device includes a single-crystal sapphire substrate having nearly a rectangular shape, and a polarizer provided on the single-crystal sapphire substrate on at least one side of a light incidence surface and a light emission surface. The single-crystal sapphire substrate includes a c-axis substantially parallel to the surface of the substrate, and the c-axis has an inclination of about 3° to about 7° with respect to a reference side selected from perpendicularly intersecting two sides of the nearly rectangular shape.
摘要:
The illumination optical system includes a lens array having a plurality of lenses for splitting the light emitted from a light source into a plurality of sub-beams, at least some lenses of the lens array being decentered. The thickness of each of the lenses constituting the lens array is adjusted such that the step difference at the boundaries between the lenses falls within a predetermined step difference.
摘要:
The present invention provides a lighting device that has two lamp units and is suitable for a light source of a projector-type display apparatus to realize bright illumination, and also a projector-type display apparatus with such a lighting device incorporated therein. The lighting device includes a light source unit and an integrator optical system and enables an illumination area to be illuminated uniformly and evenly with the light emitted from the light source unit and transmitted via the integrator optical system. The light source unit includes a pair of lamp units arranged in parallel, and a reflector of each lamp unit has a contour with both sides cut off. The pair of lamp units are preferably arrayed in a direction perpendicular to a longitudinal direction of the illumination area. This structure realizes a small-sized, compact lighting device with a high quantity of output light. Application of such a lighting device to the projector-type display apparatus enables uniform and bright projection images to be produced.
摘要:
A red-reflecting film and a blue-reflecting film are formed in a substantially X shape on joint surfaces defined by the respective side faces of four columnar prisms or right-angle prisms. The red-reflecting film is continuously formed without separating at an intersection of the two reflecting films. The blue-reflecting film is, on the other hand, divided into two pieces by the red-reflecting film and an adhesive. It is preferable that that four columnar prisms are obtained from one block of sheet glass. This arrangement ensures an improvement in properties of a resulting light-selective prism.