摘要:
A line head includes multiple light emitting element groups each including multiple light emitting elements. In each light emitting element group, the multiple light emitting elements are disposed in a two-dimensional arrangement so that a distance Gx is greater than a distance Gy. The light emitting element groups are arranged so that pitches Px are greater than pitches Py.
摘要:
An optical scanning device (6) includes a light source (611-614), a scanning member (62), a converging lens (77), a first aperture (82), a second aperture (91), and a support member (93). The first aperture (82) is provided between the converging lens (77) and the scanning member (62) and includes a first opening portion (83) configured to restrict a beam path width in a main scanning direction of the laser beams emitted from the light source (611-614). The second aperture (91) is provided between the light source (611-614) and the converging lens (77) and includes a second opening portion (911) and a cylindrical portion (913). The second opening portion (911) is configured to restrict a beam path width in a sub scanning direction of the laser beams emitted from the light source (611-614), and is formed in the cylindrical portion (913). The support member (93) includes a cylinder supporting portion (931) that pivotably supports the cylindrical portion (913) of the second aperture (91).
摘要:
A line head includes multiple light emitting element groups each including multiple light emitting elements. In each light emitting element group, the multiple light emitting elements are disposed in a two-dimensional arrangement so that a distance Gx is greater than a distance Gy. The light emitting element groups are arranged so that pitches Px are greater than pitches Py.
摘要:
In an electrophotographic apparatus in which a beam spot has been made to have a small spot diameter by the use of a laser having an oscillation wavelength within the range of from 380 nm to 450 nm, it enables image reproduction at ultra-high resolution and in ultra-high image quality. In an electrophotographic apparatus which has I) an electrophotographic photosensitive member unit having i) an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support and ii) fitting members fitted to the end portions of the electrophotographic photosensitive member and II) an exposure means having a laser having an oscillation wavelength within the range of from 380 nm to 450 nm, and in which a spot diameter Di (µm) of a beam spot formed on the surface of the electrophotographic photosensitive member by a laser beam emitted from the laser is 40 µm or less, cylinder deflection De (µm) of the electrophotographic photosensitive member unit is 1.5 times or less the spot diameter Di (µm) of the beam spot.
摘要:
An image forming apparatus includes each write unit for each color, in which light emitting elements are arrayed in line in a main scanning direction to superimpose images based on image data of each color and to form a color image; a first write unit in which a resolution specification of an array of the light emitting elements is a first resolution; a second write unit in which a resolution specification of an array of the light emitting elements is a second resolution; a scale factor setting unit for setting a scale factor in the main scanning direction of the image data of the color corresponding to the first write unit or the second write unit based on the first resolution and the second resolution; and a scaling unit for scaling the image data in the main scanning direction based on the set scale factor.
摘要:
An image forming apparatus (100, 200, 300, 400, 500) includes a display unit (140, 240, 340, 460, 540) which outputs image data in the form of a complete image, a photosensitive medium (120, 220, 320) which forms an electrostatic latent image corresponding to the image outputted from the display unit, a developing unit (130, 231, 232, 233, 234, 331, 332, 333, 334, 51, 52, 53, 54) which develops the electrostatic latent image formed on the photosensitive medium, a transfer unit (150, 250, 260, 360) which transfers the developed image of the photosensitive medium onto a printing medium, and a fixing unit (160, 380) which fixes the transferred developed image in the printing medium.
摘要:
An optical scanning device (6) includes a light source (611-614), a scanning member (62), a converging lens (77), a first aperture (82), a second aperture (91), and a support member (93). The first aperture (82) is provided between the converging lens (77) and the scanning member (62) and includes a first opening portion (83) configured to restrict a beam path width in a main scanning direction of the laser beams emitted from the light source (611-614). The second aperture (91) is provided between the light source (611-614) and the converging lens (77) and includes a second opening portion (911) and a cylindrical portion (913). The second opening portion (911) is configured to restrict a beam path width in a sub scanning direction of the laser beams emitted from the light source (611-614), and is formed in the cylindrical portion (913). The support member (93) includes a cylinder supporting portion (931) that pivotably supports the cylindrical portion (913) of the second aperture (91).
摘要:
An image forming apparatus (10) includes an exposing unit (20) including light emitting chips (44) arranged in a main-scanning direction; a developing unit (26) configured to develop an electrostatic latent image formed on a photosensitive element (22) to form a toner image; a transfer unit (28) configured to transfer the toner image to a medium (34); a detecting unit (50) configured to detect an amount of skew in an array direction of each light emitting chip (44); an adjusting unit (68) configured to generate a density correction image to be formed on the medium (34) through dithering, the density correction image having a higher resolution than that of a printing image and having the resolution increased with an increase in the amount of skew; and a correction unit (61) configured to perform skew correction on the density correction image on the basis of the amount of skew.