Abstract: A lens assembly is provided and includes: a lens frame; and a lens frame having a hollow part into which the lens is inserted. The lens frame has a bonding hole into which an adhesive agent is injected for bonding and fixing to the lens frame the lens inserted into the lens frame and which passes through an outer wall of the lens frame and an inner wall of the hollow part.

Abstract: There is disclosed an image processing apparatus which applies an adjusting process to an image that includes a pixel to be processed. The image processing apparatus extracts an image area with a predetermined size including the pixel to be processed. The apparatus calculates a variation associated with the pixel to be processed from signal values of pixels included in the image area. The apparatus calculates a variation time count in the image area from the signal values of the pixels included in the image area. The apparatus calculates adjusting levels Fz1, Fz2, and Fe from the variation time count and the variation using a definition unit which defines correspondence among the variation time count, the variation, and the adjusting levels, and applies an adjusting process to a signal value of the pixel to be processed by the calculated adjusting levels.

Abstract: The present invention includes a first plate (14) and a second plate (15) which perform a coarse adjustment of a cylinder mirror (245) by moving the cylinder mirror (245) linearly in the substantially vertical and parallel directions with respect to an appropriate plane surface of a reflective surface (RS) of the cylinder mirror (245), and the second plate (15), a second plate opening section (15b), a setscrew (24), and a hexagon shaft (25) which perform a fine adjustment in the position of the cylinder mirror (245) by moving linearly only in the substantially parallel direction after the coarse adjustment has been completed.

Abstract: A mechanism for adjustable installation of band plate-like members facilitates the separate adjustment of a cylindrical mirror in the normal direction of the reflecting face of the mirror, in a direction intersecting the normal direction, and the orientation of the reflecting face. A mirror holder housing a cylindrical mirror is disposed in a frame. Support shafts of the mirror holder penetrate holder plates attached slidably to the frame. Adjustment plates are linked to the ends of the support shafts from outside the holder plates, which are slid to allow the mirror holder to move in the normal direction of the reflecting surface of the mirror. The adjustment plate is rotated with respect to the holder plate to rotate about the support shafts and slides with respect to the holder plate and moves in a direction different from the normal direction to adjust the magnification, register, and skew of the mirror.

Abstract: An optical scanning device has a polygon mirror unit which is housed in a dust proof chamber and mounted on a mount configured so as to prevent generation of turbulence of a current of air that is caused due to high speed rotation of the polygon mirror which leads to fluctuations of rotation of the polygon mirror.

Abstract: Provided are a light source apparatus capable of preventing a shift in an optical path of a light beam, and an optical scanner comprising the light source apparatus. An optical scanner comprises a light source apparatus in which four light sources corresponding to four colors Y, M, C and B are supported as a unit by one holder. The light sources are integrally disposed in a specific position (a position where the holder is disposed) on an optical base as a supporting base, so even if distortion of the optical base occurs resulting from a dynamic load, ambient temperature or the like, an influence of the distortion is exerted upon each of the light sources supported by the holder to substantially the same extent. Even if a shift in the whole arrangement of the light sources occurs, a large shift in a positional relationship between each light source does not occur.

Abstract: Provided is an optical scanner capable of preventing a temperature rise in a polygon mirror and its surrounding, and contributing to the prevention of degradation in image quality. Two cells (an inlet and an outlet) among a plurality of cells of a strengthening rib structure disposed in an optical base are connected through a passageway so as to form a flow path of outside air (air), and a bottom surface of a drive board forming part of an outer wall of a containing chamber and supporting a polygon mirror is exposed to the flow path (passageway). Even if a motor and a motor circuit disposed in the drive board generates heat during rotation of the polygon mirror, the drive board is directly cooled by the air flowing through the flow path, so a temperature rise in the polygon mirror and its surroundings can be prevented. Thereby, degradation in scanning characteristics of a laser beam due to deformation of an enclosure resulting from a temperature difference during heat generation can be prevented.

Abstract: An optical scanning device has an electric motor and a rotary polygon mirror driven by the electric motor which are received in a dust proof chamber equipped with a cooling fin arrangement which

Abstract: An optical scanning device of a type having a scanning optical system for deflecting scanning beams bearing image information of a common subject image which includes a polygon deflection mirror and an f &thgr; lens comprises a scanning beam separation polygon mirror for separating the scanning beams in different directions and a couple of first and second reflection mirrors provided for each scanning beam, the first and second reflection mirrors for at least one of the scanning beams being disposed on opposite sides of the scanning beam separation polygon mirror, respectively so that the scanning beam travels across an axis of the scanning optical system with an effect of providing a long optical path.

Abstract: Provided are a light source apparatus capable of preventing a shift in an optical path of a light beam, and an optical scanner comprising the light source apparatus. An optical scanner comprises a light source apparatus in which four light sources corresponding to four colors Y, M, C and B are supported as a unit by one holder. The light sources are integrally disposed in a specific position (a position where the holder is disposed) on an optical base as a supporting base, so even if distortion of the optical base occurs resulting from a dynamic load, ambient temperature or the like, an influence of the distortion is exerted upon each of the light sources supported by the holder to substantially the same extent. Even if a shift in the whole arrangement of the light sources occurs, a large shift in a positional relationship between each light source does not occur.

Abstract: Provided is an optical scanner capable of preventing a temperature rise in a polygon mirror and its surrounding, and contributing to the prevention of degradation in image quality. Two cells (an inlet and an outlet) among a plurality of cells of a strengthening rib structure disposed in an optical base are connected through a passageway so as to form a flow path of outside air (air), and a bottom surface of a drive board forming part of an outer wall of a containing chamber and supporting a polygon mirror is exposed to the flow path (passageway). Even if a motor and a motor circuit disposed in the drive board generates heat during rotation of the polygon mirror, the drive board is directly cooled by the air flowing through the flow path, so a temperature rise in the polygon mirror and its surroundings can be prevented. Thereby, degradation in scanning characteristics of a laser beam due to deformation of an enclosure resulting from a temperature difference during heat generation can be prevented.

Abstract: The present invention includes a first plate (14) and a second plate (15) which perform a coarse adjustment of a cylinder mirror (245) by moving the cylinder mirror (245) linearly in the substantially vertical and parallel directions with respect to an appropriate plane surface of a reflective surface (RS) of the cylinder mirror (245), and the second plate (15), a second plate opening section (15b), a setscrew (24), and a hexagon shaft (25) which perform a fine adjustment in the position of the cylinder mirror (245) by moving linearly only in the substantially parallel direction after the coarse adjustment has been completed.

Abstract: An optical scanner assembly in which a pair of F&thgr; lenses are arranged symmetrically across a single deflector means and a reflector for introducing a light beam from at least one of a plurality of light sources to the deflector means is arranged on the side opposite to that light source with respect to an axis of symmetry of the F&thgr; lenses so that the optical path up to the reflector crosses the axis of symmetry, thereby securing the optical path length from the light source to the deflector for the miniaturization of the optical scanner assembly and allowing easy adjustment for equalizing the optical path lengths of all the light sources.

Abstract: An optical scanner assembly in which a pair of F&thgr; lenses are arranged symmetrically across a single deflector means and a reflector for introducing a light beam from at least one of a plurality of light sources to the deflector means is arranged on the side opposite to that light source with respect to an axis of symmetry of the F&thgr; lenses so that the optical path up to the reflector crosses the axis of symmetry, thereby securing the optical path length from the light source to the deflector for the miniaturization of the optical scanner assembly and allowing easy adjustment for equalizing the optical path lengths of all the light sources.

Abstract: An optical scanning device of a type having a scanning optical system for deflecting scanning beams bearing image information of a common subject image which includes a polygon deflection mirror and an f&thgr;lens comprises a scanning beam separation polygon mirror for separating the scanning beams in different directions and a couple of first and second reflection mirrors provided for each scanning beam, the first and second reflection mirrors for at least one of the scanning beams being disposed on opposite sides of the scanning beam separation polygon mirror, respectively so that the scanning beam travels across an axis of the scanning optical system with an effect of providing a long optical path.

Abstract: An optical scanning device for scanning a subject medium with a scanning beam that is oscillated by a polygon mirror along a straight line on the subject medium is provided with a rotational speed variation restraint partition which operates to restrain an occurrence of momentary rotational speed variations of the polygon mirror due to turbulence of a current of air that are caused by high speed rotation of the polygon mirror.

Abstract: A mechanism for adjustable installation of band plate-like members facilitates the separate adjustment of a cylindrical mirror in the normal direction of the reflecting face of the mirror, in a direction intersecting the normal direction, and the orientation of the reflecting face. A mirror holder housing a cylindrical mirror is disposed in a frame. Support shafts of the mirror holder penetrate holder plates attached slidably to the frame. Adjustment plates are linked to the ends of the support shafts from outside the holder plates, which are slid to allow the mirror holder to move in the normal direction of the reflecting surface of the mirror. The adjustment plate is rotated with respect to the holder plate to rotate about the support shafts and slides with respect to the holder plate and moves in a direction different from the normal direction to adjust the magnification, register, and skew of the mirror.

Abstract: An optical scanning device of a type having a scanning optical system for deflecting scanning beams bearing image information of a common subject image which includes a polygon mirror and an ƒ&thgr; lens comprises a scanning beam separation mirror for separating the scanning beams in different directions and a pair of first and second reflection mirrors provided for each scanning beam, the first and second reflection mirrors being disposed on opposite sides, respectively so that the scanning beam travels across an axis of the scanning optical system. The optical scanning device is additionally provided with a scanning beam detector which provides a start signal for commencement of a scan timely when detecting the scanning beam directed toward a position immediately before a given scanning area.

Abstract: An optical scanner assembly includes a plurality of laser beams emitted from a laser light source reflected by a polygonal mirror and incident upon a multi-sided splitter mirror containing two adjacent reflective sides of a polygon, such as a square. The top of the multi-sided splitter mirror is arranged on the incidence center axis, and the aforementioned plurality of laser beams are split to be incident upon two reflective surfaces with the top interposed therebetween.

Abstract: An optical scanning device has a rotary polygon mirror and an f-&thgr; lens system which comprises a first lens disposed adjacent to the polygon mirror, a reflection mirror for turning an optical path of the f-&thgr; lens system at an approximately right angle and a second lens disposed in the optical path after the reflection mirror.