Abstract: The present invention provides an image display apparatus that inhibits deterioration of image quality caused by an increase in temperature of a laser light source apparatus. The image display apparatus of the present invention has a green color laser light source apparatus, a red color laser light source apparatus, a blue color laser light source apparatus, and a projection mouth in a first case. The first case has a fin on a side surface opposite to a projection mouth of the first case. The fin is provided in an air passage, the fin dissipating heat generated from laser light source apparatuses of each color and transferred via the first case.

Abstract: Top surfaces and inclined surfaces of prisms on a side opposite to a light source are formed such that, in a region on a light source side, light traveling in a light guide body toward the side opposite to the light source is sequentially reflected by the top surfaces and the inclined surfaces of the side opposite to the light surface of the prisms and approaches a direction orthogonal to the longitudinal direction of the light guide body. The height of the prisms can be the lowest in the longitudinally central portion of the light guide body, and gradually increases toward the light source side and the side opposite to the light source, from the central portion.

Abstract: A document scanning device includes a pair of light guides that extend in a main scanning direction of a document and illuminate the document, and a reference plate that is positioned closer to the light guides than the document. Each of the light guides has a first area that illuminates the document and a second area that illuminates the reference plate. Each light guide illuminates the reference plate over a wider area between the light guides in the second area than each light guide illuminates the document in the first area. Therefore, the center of the reference plate is illuminated and a sufficient amount of light is reflected on the reference plate.

Abstract: Provided is a laser light source apparatus capable of maintaining a favorable level of laser output and inhibiting a margin for optical axis adjustment required for other optical elements. The present invention includes: a semiconductor laser emitting excitation laser light; a laser medium excited by the excitation laser light and emitting infrared laser light; a wavelength conversion element converting a wavelength of the infrared laser light and emitting harmonic laser light; a concave mirror having a concave surface opposing the conversion element; and a mirror supporter supporting the concave mirror. The mirror supporter has a mouth that transmits laser light from the conversion element toward the concave mirror, and a contacting surface orthogonally intersecting an optical axis of the laser light from the conversion element and contacting the concave surface side of the concave mirror.

Abstract: The present invention provides an image display apparatus that inhibits deterioration of image quality caused by an increase in temperature of a laser light source apparatus. The image display apparatus of the present invention has a green color laser light source apparatus, a red color laser light source apparatus, a blue color laser light source apparatus, and a projection mouth in a first case. The first case has a fin on a side surface opposite to a projection mouth of the first case. The fin is provided in an air passage, the fin dissipating heat generated from laser light source apparatuses of each color and transferred via the first case.

Abstract: An image display apparatus of the present invention includes an air passage formed by connecting an air inlet port and an exhaust port inside a case having the air inlet port and the exhaust port, and an air blower that is arranged in the air passage. At least a part of a heat dissipator of a red color laser light source apparatus having the lowest upper limit of an operating temperature is arranged in the air passage closer to the air inlet port than heat dissipators of other laser light sources and also directly below the cooling fan. Hence, it is possible to provide the image display apparatus that inhibits image quality deterioration.

Abstract: Angle adjustment of a wavelength conversion element after assembly is eliminated to achieve a reduction in production cost with a simplified structure. An element holder provided on a base that supports the wavelength conversion element is provided with a mounting reference surface that positions the wavelength conversion element in parallel with an optical axis. The wavelength conversion element has a substantially parallelepiped shape. A bottom surface, which is one of the four surfaces adjacent to an incident surface and an output surface, is in contact with the mounting reference surface, such that a depth direction of inverted polarization regions is substantially orthogonal to the optical axis and the incident surface and the output surface are tilted at a predetermined tilt angle relative to a flat surface orthogonal to the optical axis.

Abstract: The present invention provides an image display apparatus that includes a case having an air inlet port and an exhaust port; a cooling air passage that is formed by connecting the air inlet port and the exhaust port; and an optical unit that is provided within the case. The optical unit includes a red color laser light source, a green color laser light source, and a blue color laser light source, and these laser light sources are positioned in the cooling air passage. Further, the image display apparatus has an air blower that cools the laser light sources of the respective colors by introducing air from the air inlet port and exhausting air from the exhaust port; and a lens that is provided on the light-emitting side of the laser light sources. The red color laser light source is positioned closer to an upstream side of the cooling air passage than the green color laser light source and the blue color laser light source.

Abstract: Provided is an image display apparatus that has: a case distinguished into a plurality of regions and has a projection port; an image display apparatus main body that projects an image from the projection port; and a controller that electrically connects to the image display apparatus main body and to an external electronic device, and is positioned so as to straddle on the plurality of regions. The case has: a first region that houses a first portion of the controller and is held by the electronic device at least at one portion of the region; a second region positioned away from the electronic device so as to sandwich the first region and houses the image display apparatus main body; and a third region positioned away from the projection port and away from the electronic device so as to sandwich the first region, and houses a second portion of the controller. Therefore, the image display apparatus can be made compact to be installed within an electronic device.

Abstract: In a laser light source apparatus using a wavelength converting device (35), the position and angle of the wavelength converting device are allowed to be varied so as to maximize the laser output. The angular adjustment of the wavelength converting device is simplified by accurately positioning the wavelength converting device. A holder (57) for retaining the wavelength converting device may be supported by a support portion (56) formed in a base (38) so as to be moveable in the depthwise direction of the poled inverted domain regions and tiltable with respect to the optical path. Preferably, the holder may be rotatable around an axial line substantially perpendicular to the optical axial line.

Abstract: In order to reduce manufacturing cost of a base supporting a semiconductor laser, without deteriorating accuracy of mounting of the semiconductor laser, a mounting member is provided between the base supporting the semiconductor laser and the semiconductor laser; and the semiconductor laser and the base are fixedly attached with heat-cured silver paste. The silver paste has a lower curing temperature than an assurance temperature of the semiconductor laser, and a higher heat resistance than an operation temperature of the semiconductor laser. The mounting member is formed of a material having a higher heat resistance than the curing temperature of the silver paste.

Abstract: The present invention provides a light guide body that has a light incidence portion through which light enters the light guide body; a light reflecting portion positioned opposite a light emitting surface that extends from the light incidence portion in a longitudinal direction of the light guide body; and a tapered portion having an inner surface that gradually expands from the light incidence portion toward the light reflecting portion. The tapered portion has a light shielding portion to shield, from the light, a part of the light reflecting portion closest to the light incidence portion.

Abstract: Top surfaces and inclined surfaces of prisms on a side opposite to a light source are formed such that, in a region on a light source side, light traveling in a light guide body toward the side opposite to the light source is sequentially reflected by the top surfaces and the inclined surfaces of the side opposite to the light surface of the prisms and approaches a direction orthogonal to the longitudinal direction of the light guide body. The height of the prisms can be the lowest in the longitudinally central portion of the light guide body, and gradually increases toward the light source side and the side opposite to the light source, from the central portion.

Abstract: A document scanning device includes a pair of light guides that extend in a main scanning direction of a document and illuminate the document, and a reference plate that is positioned closer to the light guides than the document. Each of the light guides has a first area that illuminates the document and a second area that illuminates the reference plate. Each light guide illuminates the reference plate over a wider area between the light guides in the second area than each light guide illuminates the document in the first area. Therefore, the center of the reference plate is illuminated and a sufficient amount of light is reflected on the reference plate.

Abstract: A downsized and flattened exposure device is provided. A substrate (301) is supported only at either one side in the width direction (403) of the substrate surface that is orthogonal to the direction of the row and supported by only one enclosing member (201) at least in the section in the direction of the row of light emitting elements (401) where the light emitting elements (401) are arranged. With this structure, even if the substrate is supported at multiple points, the substrate is subject to almost no distortion due to multipoint support, allowing the substrate to have a reduced size in the width direction, further downsizing and flattening the exposure device.

Abstract: An image formation apparatus comprises photosensitive drums for respectively forming toner images corresponding to specified colors of an original image, an intermediate transfer belt onto which the toner images are transferred from the photosensitive drums in superimposed relation to form a synthetic toner image, and transfer rollers each for pressing the intermediate transfer belt against the associated photosensitive drum. The photosensitive drum disposed more upstream in a direction of conveyance of the intermediate transfer belt has a lower speed. The intermediate transfer belt may be designed to move at a speed higher than those of the photosensitive drums. With this construction, a sag or dip of the intermediate transfer belt between any two adjacent photosensitive drums is eliminated, thereby preventing a color drift of the synthetic toner image.