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7619796 |
Optical scanning device and image forming apparatus
An aperture has an aperture opening that transmits a predetermined portion of a light beam. A phase optical element changes a phase of a portion of a light beam. A scanning lens focuses the light...
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7593029 |
Optical scanning device and image forming apparatus using the same
An optical deflector of the present invention includes a movable mirror and torsion bars supporting the mirror and formed integrally with the mirror. The mirror reciprocatingly vibrates to reflect...
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7589756 |
Optical scanning device, image forming apparatus, optical scanning correcting method, and image forming method
A beam detecting unit detects at least one of a position of an optical beam in a sub scanning direction and a position of the optical beam in a main scanning direction. A color-misalignment...
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7583417 |
Bi-directional scanning and imaging with scanning compensation
In bi-directional imaging, such as bi-directional printing, a driving mechanism scans a light beam through a scan path across an imaging window. A controller enables transmission of video data to a...
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7557974 |
Optical scanning apparatus and image forming apparatus using the same including relationship between interval between deflector and scanned surface and a natural convergent point
A compact optical scanning apparatus capable of desirably correcting an f characteristic, a field curvature, and other aberrations, and an image forming apparatus using the same, which includes an...
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7554709 |
Optical scanning apparatus and image forming apparatus employing this apparatus
An optical scanning apparatus including a light source, deflection unit configured to deflect a light flux emitted by the light source, a first optical system configured to condense a divergent...
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7550712 |
Optical scanning system with reduced spherical aberration and image forming apparatus using the same
An optical scanning system and an image forming apparatus having the same. The optical scanning system includes a light source, a deflector, an input optical system for directing a light beam from...
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7538789 |
Optical scanning device and image forming apparatus using the same
An optical scanning device includes a rotary polygonal mirror for scanningly deflecting light beams emitted from a light source device having light emitting members disposed spaced apart from each...
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7528363 |
Image forming apparatus with noise reduction
An image forming apparatus is provided which includes a plurality of optical scanners, each including a rotating polygon mirror adapted to scan and expose a surface of an image bearing medium to...
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7522324 |
Optical scanning device and image forming apparatus using the same
An optical scanning device and an image forming apparatus having the same include a light source, a deflecting system, an imaging optical system with at least one imaging optical element for...
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7515322 |
Beam scanning device with light blocking member
A beam scanning device includes a light source to emit a light beam, an optical deflector to deflect the light beam, and an optical system including a fθ lens to guide the defected light beam to a...
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7468823 |
Optical beam scanning device, image forming apparatus and lens
An optical beam scanning device of the invention includes a single light deflection device, a pre-deflection optical system which causes a light beam emitted from a light source to be incident to...
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7460146 |
Dynamic correction of field curvature from a scanner
Systems and methods are described that dynamically correct field curvature and other focus errors in imaging systems that use rotating scanners to scan an image field. The dynamic correction...
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7443557 |
Optical beam scanning apparatus and image forming apparatus
An image forming apparatus provided with an optical beam scanning apparatus according to the invention includes a semiconductor laser device, a pre-deflection optical system, a polygon mirror, and...
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7443415 |
Optical beam scanning device and image forming apparatus having window for polygon mirror cover
An optical beam scanning device includes a light deflecting device with at least a polygon mirror portion of which is covered by a cover having a cover window portion for keeping a passage for an...
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7428088 |
Optical scanning apparatus and method for adjusting the same
An optical scanning apparatus which is free from any deterioration of drawing performance and which can be miniaturized and simplified in overall configuration, and an image forming apparatus using...
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7420583 |
Image forming apparatus and control method therefor
There is provided an image forming apparatus which is capable of reducing a period of time required for obtaining an image output, in the case of changing the image forming operation from a...
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7417777 |
Optical scanning device and image forming apparatus
A coupling lens arranged on an optical path of an optical beam from a VCSEL, which has a refraction plane and a diffraction plane that respectively change a power according to a temperature change...
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7408689 |
Light scanning unit and image forming apparatus employing the same
A light scanning unit includes a light source which emits light beam with a predetermined wavelength, a beam deflector which deflects and scans the light beam emitted by the light source toward a...
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7400338 |
Image forming apparatus with temperature detection
An image forming apparatus including: an optical scanning unit for deflecting and scanning a light on a photosensitive body, the optical scanning unit having: a light source for emitting the light;...
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7362487 |
Optical element and optical scanning device using the same
Provided is an optical element capable of reducing Fresnel (surface) reflection on a lens surface which causes flare or ghost, an optical system including the optical element, and an optical...
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7319475 |
Method and apparatus for image forming capable of preventing image quality deterioration induced by heat from an optical deflector
An image forming apparatus includes an image bearing member having a photosensitive surface and an optical writing apparatus generating a laser beam modulated according to image data. The optical...
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7315409 |
Optical scanning device and image forming apparatus using the same
An optical scanning device deflects, by a common optical deflecting part, a plurality of groups of light beams emitted from a plurality of light sources and directs, by a scanning and imaging...
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7307650 |
Arrangement for, and a method of, reducing image distortion due to electrical interference
Electrical interference between resonant, drive and line frequencies in a drive is reduced by selecting the resonant frequency to be non-harmonically related to the drive and line frequencies. The...
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7304778 |
Optical scanning system and image forming apparatus using the same
An optical scanning system and an image forming apparatus with such optical scanning system, include a light source, an optical deflector having a deflecting surface, for scanningly deflecting a...
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7304777 |
Optical scanning apparatus and image forming apparatus using the same
An overfilled optical scanning apparatus has an incidence optical system for converging a light beam onto a deflection surface of a light deflector which has a plurality of deflection surfaces, and...
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7298390 |
Optical scanning device for scanning a laser beam on an image bearing member
A laser beam source that emits a laser beam includes a reflecting unit that has a plurality of reflecting members and reflects the laser beam emitted from the laser beam source, a deflecting and...
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7274499 |
Scanning optical apparatus and image forming apparatus using the same
An object of the present invention is to prevent deterioration of image quality caused by ghost light generated from components of a scanning optical apparatus. In the present invention, an image...
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7265886 |
Optical scanner and image forming apparatus
The over-field type optical scanner includes a first imaging optical system disposed between a light source and a rotating polygon mirror for forming, on one surface of the rotating polygon mirror,...
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7253935 |
Optical scanner, image forming apparatus, and optical scanner attitude correcting method
An optical scanner includes a light source that emits a light beam, a deflection unit that deflects the light beam, an optical unit that introduces the light beam to a target surface, a housing...
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7251067 |
Optical scanning apparatus
The present invention has as its object to provide a compact optical scanning apparatus of high performance. So, in the present invention, an optical scanning apparatus comprised of two or more...
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7248391 |
Optical scanning system and image forming apparatus using the same
Disclosed is an optical scanning system and an image forming apparatus having the same, wherein, in one preferred form of the invention, the optical scanning system includes a light source device,...
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7193762 |
Scanning optical apparatus and image forming apparatus using the same
A scanning optical apparatus having stable optical performance even if the characteristic of a vertical cavity surface emitting laser is fluctuated due to increase in drive current, and an image...
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7180534 |
Scanning assemblies, printing devices, and related methods
Scanning assemblies, printing devices, and related methods are described. In one embodiment, pole pieces are configured to be coupled with an input voltage source that can produce phase-shifted...
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7164517 |
Light scanning device and image-forming apparatus using the same
In an lens of a scanner unit, a first incidence surface of a first lens is formed as an aspherical surface rotationally symmetrical with respect to an optical axis while a first emergence surface...
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7149021 |
Optical scanner and image forming apparatus using the same
An optical scanner for an image forming apparatus of the present invention includes a polygonal mirror for steering a scanning beam incident thereto and an optical device located in the vicinity of...
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7149019 |
Optical scanning system and image forming apparatus using the same
Disclosed is an optical scanning system and an image forming apparatus using the same, which is designed to reduce the overall size of the system and to make uniform the light spot diameter in a...
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7136208 |
Light scanning apparatus and image forming apparatus using the same
A light scanning apparatus capable of printing with a high quality and an image forming apparatus using the same are obtained. The light scanning apparatus is provided with an incidence optical...
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7133177 |
Optical scanner and image forming apparatus
An optical scanner includes a scanning unit having a reflecting surface that reflects a laser beam and scans the laser beam in a primary scanning direction, a laser beam radiation unit that...
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7133061 |
Multilaser bi-directional printer with an oscillating scanning mirror
System and method for generating lines of data on a photosensitive medium for use with a display or a printing apparatus. The lines of data are generated by two or more modulated and parallel laser...
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7085031 |
Optical scanner and image forming apparatus using the same
An optical scanner includes a light source ( 1 ) that emits a light beam, a light deflector ( 6 ), an incident optical system ( 5 ) that allows the light beam to impinge on the light deflector such...
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7075563 |
Multi-beam laser scanning device
There is provided a multi-beam laser scanning device able to efficiently suppress and prevent density fluctuation and achieve higher image quality. The multi-beam laser scanning device comprises a...
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7072088 |
Optical scanning apparatus, multi-beam optical scanning apparatus, and image-forming apparatus
Provided are compact, high-definition, optical scanning apparatus and multi-beam scanning apparatus capable of keeping the spot size uniform in the sub-scanning direction throughout the entire,...
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7057781 |
Optical scanning apparatus and image forming apparatus using the same
An optical scanning apparatus includes an incidence optical system for causing a beam emitted from a light source to be incident on a deflector, and a scanning optical system for causing the beam...
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7050210 |
Optical scanning device and imaging apparatus implementing the same
An optical scanning device, including a resin lens having a power that is an inverse power of scanning lens placed before a deflector. A bundle of rays emitted from a plurality of light sources is...
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7038823 |
Light scanning device
A first fθ lens is arranged to form an inclination angle α 1 to a main scanning plane. A second fθ lens is arranged to form an inclination angle α 2 . In order to determine the inclination...
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7034972 |
Optical scanning device and image forming apparatus using the optical scanning device
An optical scanning device has an incident optical system that makes a light beam emitted from a light source unit enter to a deflection surface of an optical deflector in a state in which the...
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7019766 |
Optical scanning device
An optical scanning device directs a light beam emitted from a light source to a mirror of a mechanical deflector through a first optical system, deflects the light beam in a main scanning...
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7006120 |
Multi-beam optical scanning apparatus and image forming apparatus
A multi-beam optical scanning apparatus includes a semiconductor laser array slanted relative to a sub-scanning direction and emitting a plurality of optical beams; a coupling lens converting a...
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6992689 |
Light scanning unit for use in image forming apparatus
A light scanning unit of the present invention can reduce the degree of variation in the quantity of light on a photosensitive body by a scanning position and can reduce a difference in density of...
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