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7453616 |
Optical scanner configured so a principal ray of an incident beam from a light source to a deflector and a principal ray of a scanning beam from the deflector to a scanned surface travel on same side (or opposite sides) of an optical axis of an optical element(s) having transmissive surfaces both convex (or both concave) toward the deflector in sub-scanning section respectively, and image forming apparatus using the same
Optical scanners are configured so a principal ray of an incident beam from a light source device to a deflector and a principal ray of a scanning beam from the deflector to a scanned surface...
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7450313 |
Scanning lens molded from resin and method of positioning a scanning lens
A scanning lens is molded from resin. A lens part refracts a light beam which is scanned in a first direction of the lens part. The lens part defines an optical axis orthogonal to the first...
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7446918 |
Light scanning device
A rotational multifaceted mirror ( 24 ) deflects a laser light outgoing from a semiconductor laser ( 21 ), so that the light scanning device ( 2 ) which scans the photoconductive drum ( 131 ) has a...
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7443559 |
Optical scanning unit
An optical scanning unit including: a light source which produces and emits a beam; a beam deflector which deflects and scans the beam in a main scanning direction of an exposed object; and an f-θ...
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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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7397592 |
Beam irradiation apparatus, beam irradiation method, and method for manufacturing a thin film transistor
A galvanometer mirror rotates in one direction when the galvanometer mirror is used. A spot can be scanned on an irradiated surface at a more constant speed by rotating the galvanometer mirror and...
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7388698 |
Laser scanning unit with meniscus scan lens having asymmetric, negative curvature in the sub-scanning direction and absolute curvature values in the main-scanning direction that are maximal at the center and differing minimal values at each side
A scanning optical lens used for a laser scanning unit for imaging a laser, which is deflected by a beam deflection unit, on a photosensitive body. The scanning optical lens has a curvature of a...
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7355772 |
Scanner and image forming apparatus including a pre-deflection lens that has a width reduced by an emission-side concavity and that converges light incident on areas other than the thinned portion
A cylindrical lens is positioned between and a polygon mirror and a second slit plate through which light beams from two light beam emitting units pass, and the cylindrical lens has a thin portion...
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7345801 |
Laser scanning device
Laser light, emitted from a laser light source, is formed into a converged light ray by a condensing lens, and deflected by a resonance mirror. The laser light is converged on a photosensitive...
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7274498 |
Post-objective scanning device
A post-objective scanning device using a rotatable polygon mirror has a correction system for achieving telecentric scanning with a well-corrected scanning spot. A mirror facet tracker is provided...
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7268948 |
Optical element and optical scanning device using the same
To obtain an optical element capable of obtaining uniform anti reflection characteristics over the whole optical surface having a finite curvature of the optical element, a plurality of convex...
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7253938 |
Laser scanning apparatus
A light scanning apparatus is provided. The light scanning apparatus includes a beam splitter, which is located between a polygonal mirror and an fθ lens and reflects a portion of light incident...
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7253936 |
Laser scanning unit
A laser scanning unit is provided which can use an inexpensive and easily manufactured fθ lens and which can further ensure good precision in adjustment. The laser scanning unit can repeatedly...
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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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7245411 |
Collimating lens with temperature compensation and an optical scanning apparatus using the same
A temperature-compensated collimating lens provided of a single piece of lens, which does not have variation in its focal distance due to temperature changes, and an optical scanning apparatus...
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7230769 |
Humidity tolerant scan lens
A lens has a lens body ( 1 ), reinforcing extensions ( 3 a, 3 b ) and a clear aperture ( 9 ) surrounded on top and bottom by lens body. The lens is suitable for spot scanning. The lens is made of...
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7218433 |
Scanning apparatus using a plurality of diffracted beams
The present invention provides a scanning apparatus, which scans a plurality of diffracted beams, obtained by diffracting and modulating light emitted from a single light source, on a scanning...
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7202986 |
Light scanning unit
A light scanning unit for adjusting image magnification and beam diameter and having a simple structure and a low-priced multi-beam shape is provided. The light scanning unit includes a composite...
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7196831 |
Two-dimensional optical scan system using a counter-rotating disk scanner
A counter-rotating disk scanner together with another scan mechanism provides two-dimensional optical scanning. The counter-rotating disk scanner includes counter-rotating scan disks that implement...
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7190499 |
Laser scanning unit
A laser scanning unit mainly includes a semiconductor laser, a collimator, a micro electronic mechanic system (MEMS) oscillatory mirror, and an fθ lens or an f sin θ lens. The MEMS oscillatory...
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7173746 |
Multi-beam scanning apparatus
A multi-beam scanning apparatus has a lateral magnification M in a sub-scanning direction from a light source to a scanned surface satisfying 8.5≦M≦9.5, and a lateral magnification M 2 in the...
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7170662 |
Optical lens system, optical scanning apparatus, and image forming apparatus
An optical lens system including a plurality of optical lenses which cooperate with each other to transmit a laser beam deflected in a main scanning direction to scan an object in the main scanning...
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7154652 |
Light scanning optical system, image projection apparatus, and image display system
A light scanning optical system that is capable of increasing a deflection angle without causing optical performance degradation includes a reflection surface for reflecting incident light, a unit...
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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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7149016 |
Optical element and scanning optical system having the same and image forming apparatus
An optical element that can reduce Fresnel (surface) reflection on a lens surface to be a cause of flare or ghost, and a scanning optical system having the same are provided. A microstructure...
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7142339 |
Multi-beam optical scanning apparatus and image forming apparatus using the same
A multi-beam optical scanning apparatus includes a light source in which a plurality of light emitting regions are located at an interval in a main scanning direction, an incident optical system...
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7099061 |
Image-forming device and scanning unit for use therein
A scanning unit for use in an image-forming device includes, for example, four light sources that emit light beams corresponding to yellow, magenta, cyan and black images. The light beams are...
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7075690 |
Optical scanning device and image forming apparatus using the same
An optical scanning device is provided, which includes: a light source unit for emitting at least one light flux having a wavelength equal to or smaller than 500 nm; a deflection unit for...
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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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7034973 |
Scanning optical system, optical scanning device, and image forming apparatus
A scanning optical system condensing a light flux deflected by an optical deflector so as to form an optical spot on a surface to be scanned, includes a unitary lens, wherein: a lens configuration...
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7016093 |
Optical scanning apparatus and image forming apparatus
In an optical scanning apparatus, a light beam emitted from a light source is deflected and scanned by a light deflecting member, and then scanned and imaged with substantial speed uniformity onto...
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7006269 |
Multi-beam scanning device
A multi-beam scanning device includes a multi-beam light source unit that emits a plurality of light beams having different wavelengths. The light beams are aligned in a main scanning direction....
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6999216 |
Reflective scanning optical system
There is provided a reflective scanning optical system, which includes a light source unit for emitting a beam, a polygon mirror, and a single fθ optical element. Magnification m z of the fθ...
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6995919 |
F-theta lens and laser scanning unit including the same
An f-theta lens and a laser scanning unit including the same are provided. The f-theta lens for a laser scanning unit includes a lens body that to focus incident light onto a scanning surface, and...
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6985312 |
Lens mounting device
An image forming apparatus comprising a lens mounting device in an optical housing. The lens mounting device can prevent the lens mounted on a lens bonding member from being affected by...
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6980342 |
Optical beam scanning device
An optical beam scanning device 21 includes a pre-deflection optical system 40 for adjusting a laser beam L emitted from a semiconductor laser element 41 so as to be focused as a line image...
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6965465 |
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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6956686 |
Scanning optical system
A scanning optical system includes a light source, an anamorphic optical element, a polygonal mirror, and an imaging optical system that converges the beam(s) on a surface to be scanned. The...
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6927917 |
Optical element, scanning optical system having the same, and image forming apparatus
The optical element has a microstructure lattice formed on at least one optical surface. In the optical element, the microstructure lattice is formed from an arrangement for adjusting a change in...
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6919993 |
Scanning lens and scanning optical device
A scanning lens molded with resin is disclosed. The lens has a first lens surface which a light beam incident to, and a second lens surface which emits the light beam. The lens further includes a...
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6914727 |
Imaging optical system
An imaging optical system which images a line image extending in a main scanning direction in a two-dimensional image as an erected image at a unit magnification in the main scanning direction...
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6906824 |
Tandem type printer scanning optical system having diffraction lens structure
A tandem type printer is provided with a plurality of scanning optical systems, a plurality of fθ lenses and photoconductive drums, which correspond to the scanning optical systems, respectively....
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6895190 |
Switchable bandwidth lowpass filter
A novel transceiver is provided which allow for either a transmitter or receiver to be dynamically switched between two different frequency bands by use of a novel switchable lowpass filter.
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6859329 |
Scanning type display optical system and scanning type image display apparatus
A scanning type display optical system which is small in size and can display images by two-dimensionally scanning light is disclosed. The scanning type display optical system scans light from a...
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6842187 |
Optical beam scanning device and image forming apparatus
An optical beam scanning device includes plural light sources, a pre-deflection optical unit, a light deflection unit, a post-deflection optical unit, and a horizontal synchronization unit. One of...
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6829001 |
Image forming apparatus
The present invention provides a device for forming an image on a photoconductive image carrier in an image forming apparatus. The device comprises a light source for generating a light beam, an...
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6819462 |
Optical scanning apparatus of light sources with different wavelengths
The optical scanning apparatus of light sources with different wavelengths relates to an optical scanning apparatus with a plurality of light sources of different wavelengths. All the light beams...
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6813052 |
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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6807011 |
Humidity tolerant scan lens
A lens has a body ( 1 ), reinforcing extensions ( 3 a , 3 b ) and a clear aperture ( 9 ) surrounded on top and bottom by lens body. The lens is suitable for spot scanning. The lens is made of a...
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6803942 |
Light scanning device and image forming apparatus using the same
It is an object of this invention to provide a light scanning device capable of suppressing a scanning line bend to a low level, which is caused by the arrangement error of a single-element lens...
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