Abstract: A projection system is provided, including: a projection unit to output a projection image; a retardation plate arranged obliquely with respect to an optical axis of the projection image, the retardation plate to modulate a polarization state of the projection image incident thereon; a reflective polarizing plate stacked on a side of the retardation plate opposite to that on which the projection image is incident, the reflective polarizing plate to reflect a first polarization component of the projection image transmitted through the retardation plate; and a retro-reflective element provided along a direction in which the projection image is reflected by the reflective polarizing plate, the retro-reflective element to output reflected light against a direction in which the light is incident, wherein the reflective polarizing plate transmits a second polarization component of the projection image reflected by the retro-reflective element and modulated by the retardation plate.

Abstract: A projection system is provided, including: a projection unit to output a projection image; a retardation plate arranged obliquely with respect to an optical axis of the projection image, the retardation plate to modulate a polarization state of the projection image incident thereon; a reflective polarizing plate stacked on a side of the retardation plate opposite to that on which the projection image is incident, the reflective polarizing plate to reflect a first polarization component of the projection image transmitted through the retardation plate; and a retro-reflective element provided along a direction in which the projection image is reflected by the reflective polarizing plate, the retro-reflective element to output reflected light against a direction in which the light is incident, wherein the reflective polarizing plate transmits a second polarization component of the projection image reflected by the retro-reflective element and modulated by the retardation plate.

Abstract: An optical device comprises: a transmittance changing unit that is provided in front of an eye of a user, and changes transmittance for light from the outside according to a voltage being applied; and a voltage control unit that controls a voltage to be applied to the transmittance changing unit by switching cyclically between a high voltage and a low voltage, wherein the voltage control unit switches the voltage at a cycle that is shorter than the sum of time required for transmittance of the transmittance changing unit to stabilize when changing from a minimum value to a maximum value by switching a voltage and time required for transmittance of the transmittance changing unit to stabilize when changing from a maximum value to a minimum value by switching a voltage.

Abstract: Conventional optical devices cannot cope with light entering from different directions in different light amounts. An optical device comprises: a transmittance changing unit that is provided in front of an eye of a user, and changes transmittance for light from the outside according to a voltage being applied; and a voltage control unit that controls a voltage to be applied to the transmittance changing unit, wherein by controlling the voltage, the voltage control unit switches between: a first relationship between frontal transmittance that is transmittance for light entering the transmittance changing unit from a frontal direction, and peripheral transmittance that is transmittance for light entering the transmittance changing unit from a direction inclined to the vertical direction relative to an entrance direction of light to which the frontal transmittance applies; and a second relationship between the frontal transmittance and the peripheral transmittance that is different from the first relationship.

Abstract: Conventional optical devices cannot cope with light entering from different directions in different light amounts. An optical device comprises: a transmittance changing unit that is provided in front of an eye of a user, and changes transmittance for light from the outside according to a voltage being applied; and a voltage control unit that controls a voltage to be applied to the transmittance changing unit, wherein by controlling the voltage, the voltage control unit switches between: a first relationship between frontal transmittance that is transmittance for light entering the transmittance changing unit from a frontal direction, and peripheral transmittance that is transmittance for light entering the transmittance changing unit from a direction inclined to the vertical direction relative to an entrance direction of light to which the frontal transmittance applies; and a second relationship between the frontal transmittance and the peripheral transmittance that is different from the first relationship.

Abstract: An optical device comprises: a transmittance changing unit that is provided in front of an eye of a user, and changes transmittance for light from the outside according to a voltage being applied; and a voltage control unit that controls a voltage to be applied to the transmittance changing unit by switching cyclically between a high voltage and a low voltage, wherein the voltage control unit switches the voltage at a cycle that is shorter than the sum of time required for transmittance of the transmittance changing unit to stabilize when changing from a minimum value to a maximum value by switching a voltage and time required for transmittance of the transmittance changing unit to stabilize when changing from a maximum value to a minimum value by switching a voltage.

Abstract: Piping unit for transporting a fuel is constructed by connecting a resin tube and a connector for connecting the resin tube to a mating pipe. The connector has a connector body including a retainer holding portion and a retainer for engaging with the mating pipe. The resin tube has a multilayered construction including an inner fuel barrier layer and an outer layer covered with a protective layer. The outer layer has a small outer diameter (od) up to 6 mm, the fuel barrier layer and the outer layer have a wall-thickness (t), and a ratio of the outer diameter (od)/the wall thickness (t) is in a range of 4 to 8.

Abstract: A piping structure for transporting a fuel arranged between an engine and a fuel tank, is constructed by use of a resin tube that is formed in a straight tubular shape. The resin tube is flexed and bent at one or more points along a longitudinal direction of the resin tube to define one or more bent portions and thereby is provided with a predetermined bent shape. The resin tube is fixed in a motor vehicle body so as to retain the bent portions and thereby assembled in the motor vehicle body.

Abstract: A piping structure for transporting a fuel arranged between an engine and a fuel tank, is constructed by use of a resin tube that is formed in a straight tubular shape. The resin tube is flexed and bent at one or more points along a longitudinal direction of the resin tube to define one or more bent portions and thereby is provided with a predetermined bent shape. The resin tube is fixed in a motor vehicle body so as to retain the bent portions and thereby assembled in the motor vehicle body.

Abstract: A piping structure for transporting a fuel arranged between an engine and a fuel tank, is constructed by use of a resin tube that is formed in a straight tubular shape. The resin tube is flexed and bent at one or more points along a longitudinal direction of the resin tube to define one or more bent portions and thereby is provided with a predetermined bent shape. The resin tube is fixed in a motor vehicle body so as to retain the bent portions and thereby assembled in the motor vehicle body.

Abstract: Piping unit for transporting a fuel is constructed by connecting a resin tube and a connector for connecting the resin tube to a mating pipe. The connector has a connector body including a retainer holding portion and a retainer for engaging with the mating pipe. The resin tube has a multilayered construction including an inner fuel barrier layer and an outer layer covered with a protective layer. The outer layer has a small outer diameter (od) up to 6 mm, the fuel barrier layer and the outer layer have a wall-thickness (t), and a ratio of the outer diameter (od)/the wall thickness (t) is in a range of 4 to 8.

Abstract: A piping member is mounted in a mounting hole of one panel by a first holder and in a mounting hole of the other panel by a second holder, respectively. Each of the first and the second holders has a through-hole for receiving the piping member therethrough, and a fit-in projecting portion that is fitted in the mounting hole so as to be positioned. Each of the first and the second holders also has a resilient lug and a collar portion for cooperatively clamping the panel with its inner and outer surfaces therebetween. The first holder holds the piping member relatively movably axially with respect to the first holder therethrough, while the second holder securely fixes the piping member axially with respect to the second holder therethrough.

Abstract: A piping structure for transporting a fuel arranged between an engine and a fuel tank, is constructed by use of a resin tube that is formed in a straight tubular shape. The resin tube is flexed and bent at one or more points along a longitudinal direction of the resin tube to define one or more bent portions and thereby is provided with a predetermined bent shape. The resin tube is fixed in a motor vehicle body so as to retain the bent portions and thereby assembled in the motor vehicle body.

Abstract: Piping unit for transporting a fuel is constructed by connecting a resin tube and a connector for connecting the resin tube to a mating pipe. The connector has a connector body including a retainer holding portion and a retainer for engaging with the mating pipe. The resin tube has a multilayered construction including an inner fuel barrier layer and an outer layer covered with a protective layer. The outer layer has a small outer diameter (od) up to 6 mm, the fuel barrier layer and the outer layer have a wall-thickness (t), and a ratio of the outer diameter (od)/the wall thickness (t) is in a range of 4 to 8.

Abstract: A piping member is mounted in a mounting hole of one panel by means of a first holder and in a mounting hole of the other panel by means of a second holder, respectively. Each of the first and the second holders has a through-hole for receiving the piping member therethrough, and a fit-in projecting portion that is fitted in the mounting hole so as to be positioned. Each of the first and the second holders also has a resilient lug and a collar portion for cooperatively clamping the panel with its inner and outer surfaces therebetween. The first holder holds the piping member relatively movably axially with respect to the first holder therethrough, while the second holder securely fixes the piping member axially with respect to the second holder therethrough.

Abstract: A silver halide color photographic material is disclosed which comprises a support and provided thereon, a first silver halide emulsion layer comprising at least one yellow image forming silver halide emulsion, a second silver halide emulsion layer comprising-at least one magenta image forming silver halide emulsion and a third silver halide emulsion layer comprising at least one cyan image forming silver halide emulsion, wherein at least one of said first, second and third silver halide emulsion layers further contains a fourth silver halide emulsion, each one of said first, second, third and fourth silver halide emulsions has a spectral sensitivity wavelength region at least six times higher than that in the wavelength region of the other three emulsions, and said fourth silver halide emulsion gives an optical density after development of 0.7 or more.

Abstract: Disclosed is a direct positive silver halide color photographic light-sensitive material comprising a support and provided thereon, a blue-sensitive emulsion layer containing previously unfogged internal latent image-forming silver halide grains having a spectral sensitivity to blue-light, a green-sensitive emulsion layer containing previously unfogged internal latent image-forming silver halide grains having a spectral sensitivity to green-light, a red-sensitive emulsion layer containing previously unfogged internal latent image-forming silver halide grains having a spectral sensitivity to red-light and a hydrophilic colloidal layer, wherein said blue-sensitive emulsion layer is provided so as to be located farther than both said green-sensitive and said red-sensitive emulsion layers from the support; and at least one of said blue-sensitive emulsion layer, said-green sensitive emulsion layer and said red-sensitive emulsion layer or said hydrophilic colloidal layer contains an internal latent image forming si

Abstract: A silver halide color photographic light sensitive material comprising a support which is both side coated with a polyolefin resin is disclosed. A hydrophilic colloidal layer containing a white pigment and a silver halide emulsion layer are provided on the support and the silver halide emulsion layer contains at least one of the compounds represented by the following Formula I, ##STR1## wherein R.sub.1 represents an alkyl group, a cycloalkyl group or an aryl group; R.sub.2 represents a fluorine atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a dialkylamino group, an alkylthio group or an arylthio group; R.sub.3 represents a group substitutable to a benzene ring; n is an integer of 0 or 1; Z represents a hydrogen atom or a group capable of splitting off when coupling it to the oxidized product of a developing agent; and Y represents a monovalent organic group including a ballast group.

Abstract: A silver halide color photographic light sensitive material comprising a support which is both side coated with a polyolefin resin is disclosed. A hydrophilic colloidal layer containing a white pigment and a silver halide emulsion layer are provided on the support and the silver halide emulsion layer contains at least one of the compounds represented by the following Formula I, ##STR1## wherein R.sub.1 represents an alkyl group, a cycloalkyl group or an aryl group; R.sub.2 represents a fluorine atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a dialkylamino group, an alkylthio group or an arylthio group; R.sub.3 represents a group substitutable to a benzene ring; n is an integer of 0 or 1; Z represents a hydrogen atom or a group capable of splitting off when coupling it to the oxidized product of a developing agent; and Y represents a monovalent organic group including a ballast group.