Abstract: In an indoor equipment of an air conditioner in which a heat exchanger, a blower, and a drain pan receiving a drain water having been condensed at mentioned heat exchanger below the heat exchanger are contained in an internal part of the indoor equipment housing including an air inlet and an air outlet; and a back portion of the drain pan is faced to an air flow path communicating with mentioned air outlet, and a stabilizer is disposed at an end portion on the upstream side of the air flow path of this drain pan, the drain pan 4 is integrally formed of a drain pan body 41 and a stabilizer portion 42 by injection molding; and a concave portion 40 is formed on the air flow path side in the vicinity of the boundary between the drain pan body and the stabilizer portion.

Abstract: In an indoor equipment of an air conditioner in which a heat exchanger, a blower, and a drain pan receiving a drain water having been condensed at mentioned heat exchanger below the heat exchanger are contained in an internal part of the indoor equipment housing including an air inlet and an air outlet; and a back portion of the drain pan is faced to an air flow path communicating with mentioned air outlet, and a stabilizer is disposed at an end portion on the upstream side of the air flow path of this drain pan, the drain pan 4 is integrally formed of a drain pan body 41 and a stabilizer portion 42 by injection molding; and a concave portion 40 is formed on the air flow path side in the vicinity of the boundary between the drain pan body and the stabilizer portion.

Abstract: A screen panel includes a rigid glass, a lenticular lens and a Fresnel lens laminated with each other, and the edges of the screen panel are sealed. An air evacuation path is formed between the lenses by wires inserted between the contact surfaces of the lenses, or by convexes or concaves previously formed on one of the contact surfaces. Because of the provision of the air evacuation path, the air between the lenses of the screen panel is sufficiently evacuated, and the lenses can closely attached to each other. Therefore, the flatness of the screen panel can be enhanced, and the degradation of the image quality can be prevented.

Abstract: A screen panel includes a rigid glass, a lenticular lens and a Fresnel lens laminated with each other, and the edges of the screen panel are sealed. An air evacuation path is formed between the lenses by wires inserted between the contact surfaces of the lenses, or by convexes or concaves previously formed on one of the contact surfaces. Because of the provision of the air evacuation path, the air between the lenses of the screen panel is sufficiently evacuated, and the lenses can closely attached to each other. Therefore, the flatness of the screen panel can be enhanced, and the degradation of the image quality can be prevented.

Abstract: A rear projection screen of the type which allows a projected light beam incident thereon to pass therethrough to a viewer side includes a Fresnel lens sheet, and a lenticular lens plate opposed to the Fresnel lens sheet. The Fresnel lens sheet is in the form of a thin sheet made of a resin, and converts the projected light beam incident thereon into substantially collimated light to direct the substantially collimated light outwardly toward the viewer side. The lenticular lens plate refracts the projected light beam incident thereon horizontally or vertically.

Abstract: It is an object to obtain a light source device and a projection type display device in which a fragment can be completely enclosed therein even if a discharge lamp bursts during lighting. During normal lighting of a discharge lamp (1), an internal space of a light source device (10) and an external space are spatially connected to each other through a vent hole (43) formed on a cutoff valve mechanism (45) and a vent hole (100) formed on a concave reflecting mirror (4). Cooling air is introduced and discharged between the internal space and the external space so that the discharge lamp (1) is cooled down. When the discharge lamp (1) bursts during lighting for some reason, a very strong impulsive pressure wave is generated in a moment of the burst. The pressure wave presses a movable valve (41) provided in the cutoff valve mechanism (45) through the vent hole (100).

Abstract: In an apparatus for measuring an angular velocity variation rate of a rotary axle, an approximately circular disc shaped plate is attached approximately concentrically around the rotary axle, in addition to a first pair of velocity pulse generators, each velocity pulse generator of the first pair being dispose around pulse circumference of the plate on a first virtual line passing through a center of the rotatory axle with one of the velocity pulse generators positioned in an 180° revolution difference with respect to each other, each velocity pulse generator of a second pair being disposed around the circumference of the plate on a second virtual line passing through the center of the rotary axle and being inclined through an angle of 180°/m to the first virtual line set when a variation in the angular velocity variation rate indicate signal occurs m-th number of times per revolution of the rotatory axle.

Abstract: It is an object to obtain a light source device and a projection type display device in which a fragment can be completely enclosed therein even if a discharge lamp bursts during lighting. During normal lighting of a discharge lamp (1), an internal space of a light source device (10) and an external space are spatially connected to each other through a vent hole (43) formed on a cutoff valve mechanism (45) and a vent hole (100) formed on a concave reflecting mirror (4). Cooling air is introduced and discharged between the internal space and the external space so that the discharge lamp (1) is cooled down. When the discharge lamp (1) bursts during lighting for some reason, a very strong impulsive pressure wave is generated in a moment of the burst. The pressure wave presses a movable valve (41) provided in the cutoff valve mechanism (45) through the vent hole (100).

Abstract: A projecter having a lamp, a lamp box containing the lamp, an outlet fan for discharging air from the lamp box, an optical system member which receives a light beam from the lamp and outputs an image light, an optical system box containing the optical system member, and an inlet fan for blowing outside air into the optical system box. The projector also has a first ventilating duct that directs the outside air blown in by the inlet fan into the lamp box.

Abstract: According to the present invention, insulating paper immersed in an oil is heated and deteriorated at a temperature up to 110° C. which is in an operating temperature region for an oil-filled electric apparatus, and the value of the degree of the polymerization which decreases with the deterioration of the insulating paper and amount of carbon dioxide and carbon monoxide which is generated by the heat decomposition of the insulating paper and which is dissolved in the insulating oil are used to observe the generation rate thereof. The present invention is a method of evaluating deterioration characteristics of insulating paper from the change of the degree of polymerization with passage of time and from the temperature dependence of the gas generation rate. The deterioration of the insulating paper has different aspects in the regions higher and lower than 110° C., and the deterioration characteristics of the insulating paper on the low temperature side can be accurately evaluated.

Abstract: A dichroic mirror for reflecting red light for optical separating and a dichroic mirror for reflecting red light for optical synthesizing are installed on the same plane in an image generating apparatus of the present invention. In addition, a dichroic mirror for reflecting blue light for optical separating and a dichroic mirror for reflecting blue light for optical synthesizing are installed on the same plane. Accordingly, a compact configuration can be realized. Since a main reflecting mirror is a rotating elliptic mirror and a lamp is located on a focus or around the focus, a lighting equipment which irradiates conic luminous flux can be realized.

Abstract: A polarizing beam splitter extracts orthogonally polarized light beams from natural light and distributes those to liquid crystal panels, which modulate polarization states of those polarized light beams in accordance with a luminance signal and chrominance signals of video signals, respectively. The modulated light beams are combined by the same polarizing beam splitter, and the combined light is enlarged and projected onto a screen by a projection lens, to reproduce a projected image.

Abstract: An optical transmission system permitting any desired machining to be done by radiating to an object to be irradiated a laser beam having an optimum intensity distribution in the direction of its optical axis or in a plane perpendicular to the optical axis, comprising a laser oscillator 1, an optical fiber 3 for propagating the laser beam emitted from the laser oscillator 1 by a predetermined distance, a condenser lens 2 for converging the laser beam from the laser oscillator 1 into the optical fiber 3, a first lens 6 for forming images with aberration from the laser beam emerging from the optical fiber 3, a mask 7 disposed in a position having a predetermined light intensity distribution out of the positions of the images formed by the first lens 6, and a second lens 4 for forming the image passing through the mask 7 onto an object 5 to be irradiated.

Abstract: An optical processing apparatus utilizing multiple reflections of a light beam between a mask and a reflector has improved uniformity in the distribution of the light beam over a surface of the mask. In one form, the reflector is disposed in a face-to-face relation with respect to the mask with an angle of inclination relative thereto. In another form, the reflector has a flat or curved taper surface for decreasing an angle of reflection of the light beam at the mask surface at an initial stage, and a flat surface disposed in parallel with the mask surface. In a further form, the reflector is curved in a direction of transmission of the light beam. In a yet further form, an angle of incidence of the light beam is properly adjusted such that a portion of the light beam, which is first reflected from the mask and escapes outwardly from the reflector, is minimized.

Abstract: A projection exposure apparatus includes a light source, a condenser lens for illuminating an illumination light emanating from the light source onto a mask on which a circuit pattern has been formed, a projection lens for condensing the illumination light which has passed through the mask onto a surface of a wafer, and an aperture member disposed between the light source and the condenser lens and having both a transmission area for shaping the light emanating from the light source and a light blocking area formed at a central portion of the transmission area. An outer diameter of the transmission area of the aperture member is set such that a ratio .sigma. of an outer diameter of an effective light source to a diameter of a pupil of the projection lens is 0.6.+-.0.3, while a light blocking rate of the light blocking area is set to 60.+-.35%.

Abstract: In a method of diagnosing the deterioration of the insulating paper in an oil-filled electric apparatus, the total amount of furfural is determined by adding the amount of furfural adsorbed on the insulating paper to the amount of furfural dissolved in insulating oil in an oil-filled electric apparatus, and the deterioration of the insulating paper is diagnosed by the correlation between the total amount of furfural determined and the polymerization degree of the insulating paper, which indicates the degree of deterioration thereof. The method thus permits the precise diagnosis of the deterioration of the insulating paper.

Abstract: A projection exposure apparatus for use in LSI production comprises a light source, a light condensing optical system through which light from the light source is condensed and applied to a mask carrying a circuit pattern, a projection lens system which projects the light transmitted through the mask onto the surface of a wafer, and an aperture member which is interposed between the light source and the light condensing optical system. The aperture member has a light transmission region for transmitting the light from the light source and a light-interrupting member disposed to extend across the light transmission region. The shape or configuration of the light-interrupting member is determined in accordance with the geometry of the circuit pattern formed on the mask.

Abstract: A projection aligner includes a light source, a condenser lens system for directing light from the light source onto a mask on which a circuit pattern is formed, a projecting lens system for collecting on the surface of a wafer the light transmitted through the mask, and an aperture member disposed between the light source and the condenser lens system. The aperture member includes a transmitting zone for transmitting light from the light source and a phase shift member for producing a predetermined phase difference between light transmitted through the transmitting zone and light transmitted through a region surrounding the transmitting zone.

Abstract: An optical machining apparatus for irradiating light from a light source onto a source to be machined to form a grooves in the surface. The apparatus uses a mask disposed in the path of light from the light source. The mask includes reflective parts for reflecting the light from the light source. The reflective parts are on a first surface of the mask. The mask also includes a reflection member for returning the light reflected at the reflective parts of the mask toward the mask.

Abstract: A projection aligner includes a light source, a condenser lens system for directing light from the light source onto a mask on which a circuit pattern is formed, a projecting lens system for collecting on the surface of a wafer the light transmitted through the mask, and a pupillary member disposed on a pupillary surface of the projecting lens system. The pupillary member includes at least one transmitting zone for transmitting the light transmitted through the mask including a phase shift member for producing a predetermined phase shift in light transmitted through part of the transmitting zone.