Abstract: A light source device includes: a fluorescent rod that contains a fluorescent substance; at least one light-guide element including a first end face, a second end face having a smaller area than that of the first end face, and a side surface portion that reflects incident light from the first end face to condense on the second end face, the second end face being optically joined to a surface of the fluorescent rod except for the emission surface; a plurality of excitation light sources arranged to face the first end face of the light-guide element; and a dichroic film provided on the surface of the fluorescent rod expect for the emission surface and having the properties of transmitting excitation light and reflecting fluorescent light.

Abstract: A projector that can increase the brightness of an image, includes: first and second image forming elements that each include micromirrors; a projection lens that projects images formed on the first and second image forming elements; and a light source/optical unit that irradiates the first and second image forming elements with first blue light and second blue light in a first display period, and irradiates the first image forming element with the green light and irradiates the second image forming element with the red light in a second display period.

Abstract: A projector that can increase the brightness of an image, includes: first and second image forming elements that each include micromirrors; a projection lens that projects images formed on the first and second image forming elements; and a light source/optical unit that irradiates the first and second image forming elements with first blue light and second blue light in a first display period, and irradiates the first image forming element with the green light and irradiates the second image forming element with the red light in a second display period.

Abstract: Provided is a wearing article that can prevent the folding of a waist panel. In a disposable wearing article that includes a waist panel for forming first and second waist regions, a liquid absorbent structure that extends from a crotch region to the first and rear waist regions and includes a liquid absorbent core, a waist opening, and a pair of leg openings, and at least in the first waist region out of the first and second waist regions, the liquid absorbent structure includes an end portion that extends from the end edge of the liquid absorbent core to the side of the waist opening, and the outer end edge of the end portion extends to the edge of the waist opening.

Abstract: A phosphor wheel has a phosphor-supporting surface on which is formed a phosphor that generates fluorescent light in response to the incidence of light; and a reflecting surface that reflects the incident light, the phosphor-supporting surface and the reflecting surface being formed both to be parallel to each other to have a distance between them in the perpendicular direction of each surface.

Abstract: A pull-on disposable diaper includes a front side portion; a back side portion; a crotch portion; a waist opening; and a pair of leg openings. An edge portion of the waist opening of the front side portion includes a recessed portion that is recessed in the lengthwise direction toward the crotch portion with respect to an edge portion of the waist opening of the back side portion. A tape member is fixed on a non-skin side surface of the back side portion so as to be extendable toward the waist opening in the lengthwise direction, the tape member being used for fixing the diaper in a small state in the lengthwise direction when the diaper is disposed of. The recessed portion is provided at a position corresponding to the tape member in the lateral direction.

Abstract: Provided is a wearing article that can prevent the folding of a waist panel. In a disposable wearing article that includes a waist panel for forming first and second waist regions, a liquid absorbent structure that extends from a crotch region to the first and rear waist regions and includes a liquid absorbent core, a waist opening, and a pair of leg openings, and at least in the first waist region out of the first and second waist regions, the liquid absorbent structure includes an end portion that extends from the end edge of the liquid absorbent core to the side of the waist opening, and the outer end edge of the end portion extends to the edge of the waist opening.

Abstract: A phosphor wheel has a phosphor-supporting surface on which is formed a phosphor that generates fluorescent light in response to the incidence of light; and a reflecting surface that reflects the incident light, the phosphor-supporting surface and the reflecting surface being formed both to be parallel to each other to have a distance between them in the perpendicular direction of each surface.

Abstract: A pull-on disposable diaper includes a front side portion; a back side portion; a crotch portion; a waist opening; and a pair of leg openings. An edge portion of the waist opening of the front side portion includes a recessed portion that is recessed in the lengthwise direction toward the crotch portion with respect to an edge portion of the waist opening of the back side portion. A tape member is fixed on a non-skin side surface of the back side portion so as to be extendable toward the waist opening in the lengthwise direction, the tape member being used for fixing the diaper in a small state in the lengthwise direction when the diaper is disposed of. The recessed portion is provided at a position corresponding to the tape member in the lateral direction.

Abstract: A projector includes: a plurality of image-forming units each including an image forming surface provided with a plurality of micromirrors; a plurality of reflecting units that are provided so as to respectively reflect the plurality of image beams formed by the image-forming units; a beam-combining unit that receives the plurality of image beams via the plurality of reflecting units and emits a combined image beam in which the plurality of image beams are combined such that the propagation directions coincide; and a projection unit that projects the combined image beam emitted from the beam-combining unit. At least two of the image-forming units are arranged such that the image-forming surface of each image-forming means lies in the same plane.

Abstract: A projector includes: a plurality of image-forming units each including an image forming surface provided with a plurality of micromirrors; a plurality of reflecting units that are provided so as to respectively reflect the plurality of image beams formed by the image-forming units; a beam-combining unit that receives the plurality of image beams via the plurality of reflecting units and emits a combined image beam in which the plurality of image beams are combined such that the propagation directions coincide; and a projection unit that projects the combined image beam emitted from the beam-combining unit. At least two of the image-forming units are arranged such that the image-forming surface of each image-forming means lies in the same plane.

Abstract: Provided is an illumination optical system capable of emitting monochromatic light having high luminance while taking safety into consideration. The illumination optical system includes a first light source configured to emit monochromatic coherent light having a first peak wavelength that belongs to the wavelength region of visible light, a second light source configured to emit monochromatic incoherent light having a second peak wavelength that belongs to a wavelength region exhibiting the same color as that of the coherent light, and a dichroic mirror configured to mainly reflect one of the coherent light and the incoherent light while mainly transmitting the other, and synthesize the optical paths of the coherent light and the incoherent light.

Abstract: Provided is an illumination optical system capable of emitting monochromatic light having high luminance while taking safety into consideration. The illumination optical system includes a first light source configured to emit monochromatic coherent light having a first peak wavelength that belongs to the wavelength region of visible light, a second light source configured to emit monochromatic incoherent light having a second peak wavelength that belongs to a wavelength region exhibiting the same color as that of the coherent light, and a dichroic mirror configured to mainly reflect one of the coherent light and the incoherent light while mainly transmitting the other, and synthesize the optical paths of the coherent light and the incoherent light.