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6400486 |
Scanning optical system having diffractive lens surface
A scanning optical system is provided with a laser diode, a polygonal mirror and a scanning lens system. The scanning lens system has positive power. Further, the scanning lens system has a...
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6396646 |
Multi-beam optical system
A multi-beam optical system has a beam-dividing element that divides a light beam emitted by a light source into a plurality of light beams, which are emerged therefrom at different angles,...
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6396615 |
Multi-beam scanning optical system
A multi-beam scanning optical system is provided with a plurality of laser diodes respectively emitting a plurality of laser beams, each of said plurality of laser diodes being accommodated in a...
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6392773 |
Multi-beam scanning optical system
A multi-beam scanning optical system is provided with a light source unit, polygonal mirror, and an fθ lens. The fθ lens includes first, second and third lenses. The beams emitted by the light...
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6392772 |
Multi-beam scanning optical system
A multi-beam scanning optical system is provided with a light source unit, polygonal mirror, and an fθ lens. The fθ lens includes a first lens that converges the beams mainly in the main scanning...
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6388737 |
Exposure method and apparatus
An exposure method and apparatus are provided. The exposure apparatus of the present invention includes a discontinuous exposure unit which discontinuously exposes the scan-end point in a first...
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6384951 |
High throughput optical scanner
A scanning apparatus is provided to obtain automated, rapid and sensitive scanning of substrate fluorescence, optical density or phosphorescence. The scanner uses a constant path length optical...
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6384950 |
Optical system for scanning
An optical system for scanning which facilitates, at a time of assembling a plurality of optical elements forming an optical system for scanning, adjustment of positional relationships between the...
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6384949 |
Optical scanning device, image forming apparatus and optical scanning method
A coupling lens couples a light flux from a light source to form a parallel light flux, a convergent light flux or a divergent light flux. An optical deflector includes a deflective reflection...
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6381078 |
Optical device
An optical scanning device according to the present invention includes a lens to convert divergent rays from a laser diode to parallel or convergent rays, a slit to regulate luminous energy of the...
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6381057 |
Multi-beam scanning apparatus
A multi-beam scanning apparatus includes a light source having a semiconductor laser chip in which a plurality of light emitting points are arranged such that optical beam spots are impinged at...
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6377381 |
Light beam deflection scanner
A light beam deflection scanner includes a plural number of semiconductor laser beam elements which are correctable so that they emit beams having an amount of light equal to each other. A light...
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6366386 |
Scanning optical device and image forming apparatus using the same
A scanning optical device to be used for an image forming apparatus such as a laser beam printer or a digital copying machine comprises a light source, an optical deflector, a first optical system...
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6366385 |
Multi-beam scanning optical system and image forming apparatus using the same
A multi-beam scanning optical system includes a light source having a plurality of light-emission points, an incident optical system for guiding a plurality of light beams emitted from the light...
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6366384 |
Multi-beam scanning method, apparatus and multi-beam light source device achieving improved scanning line pitch using large light emitting points interval
A multi-beam scanning method for scanning a scanning surface with a plurality of beams which are formed into a plurality of beam spots separated from each other in a sub scanning direction includes...
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6359717 |
Optical scanning apparatus and scanning image forming lens
An optical scanning apparatus includes a light source for outputting light, a first lens system arranged to receive the light output from the light source and to transmit a light flux therefrom, an...
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6351324 |
Laser imaging system with progressive multi-beam scan architecture
A progressive scan architecture for displaying a two-dimensional image by alternately scanning two or more laser beams, one after the other with a time delay between adjacent beams. The beams are...
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6348989 |
Scanning image forming lens and optical scanning apparatus
A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction...
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6348988 |
Scanning image forming lens and optical scanning apparatus
A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction...
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6347004 |
Optical scanning apparatus and scanning image forming lens
An optical scanning apparatus includes a light source for outputting light, a first lens system arranged to receive the light output from the light source and to transmit a light flux therefrom, an...
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6347003 |
Multi-beam laser exposer unit
A multi-beam laser exposure unit of the present invention includes a light beam deflector for deflecting a light beam in a predetermined direction, a plurality of laser devices, a pre-optical...
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6342964 |
Scanning optical system
A scanning optical system includes a semiconductor laser, a polygonal mirror, which deflects a beam emitted from the semiconductor laser, an fθ lens for converging the deflected beam onto an...
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6342963 |
Optical scanning apparatus capable of correcting positional shifts contained in plural images to be synthesized
In an optical scanning apparatus used in an image forming apparatus for scanning a plurality of optical beams on photosensitive members and for synthesizing a plurality of images formed on the...
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6341030 |
Light beam optical scanner and image forming apparatus
In an optical system, the scanning center axis of a scanning lens, the principal ray of a laser beam applied to the scanning lens, and the rotational axis of a polygon mirror are in one plane. By...
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6339491 |
Dustproof structure of optical box
There is provided a dustproof structure of an optical box in which intrusion of dust into the optical box can be prevented. Laser beams deflected by a polygon mirror of an optical box are...
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6337757 |
Multi-beam exposure unit
This invention has as its object to provide an image forming apparatus which can provide a color image free from any color misregistration with low cost, and a light scanning unit suitable for the...
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6330096 |
Light-beam scanning type image reader
The number of pixels in a horizontal scanning direction and the number of pixels in a vertical scanning direction are computed by use of a calibration sheet. The cycle of a first clock pulse which...
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6327067 |
Light scanning apparatus
A light scanning apparatus includes a deflector for deflecting a light beam emitted from a laser. A rotating reflector is provided in the deflector, and a reflecting surface is formed on the...
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6320690 |
Scanning optical apparatus and laser scanning apparatus
A scanning optical apparatus is provided with a light source for emitting a light beam, a deflector, and at least two reflecting surfaces. The deflector deflects the light beam emitted from the...
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6320689 |
Semiconductor laser and optical system having a collimator lens
An optical system includes a semiconductor laser. The semiconductor laser is accommodated within a case. The case is formed with a window to pass through laser light emitted from the semiconductor...
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6317246 |
Multi-beam scanning apparatus
A multi-beam scanning apparatus performs image scanning by emitting multiple beams from a plurality of light sources, which beams are deflected by a common deflector at equiangular velocity. The...
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6317245 |
Multi-beam scanning optical system
A multi-beam scanning optical system is provided with a light source unit emitting a plurality of beams. The beams are incident on a polygonal mirror, and deflected thereby to scan in a...
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6317244 |
Light-scanning optical system and image-forming apparatus comprising the same
A light-scanning optical system comprises a light source, a first optical system, a light deflector having a deflection surface, a second optical system, a photodetector and a luminous flux...
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6313935 |
Scanning optical apparatus
A scanning optical apparatus including a rotatable polygon mirror for deflecting laser light flux with equal angular velocity, an f lens for compensating the laser light flux deflected by the...
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6313906 |
Multibeam scanning device
Laser beams LK and LY are respectively emitted from laser diodes 51K and 51Y and incident on a mirror face of a polygon mirror 55 via collimator lenses 52K, 52Y and first cylindrical lenses 53K,...
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6310711 |
Optical defection device, stop control method thereof, and image forming apparatus therewith
An optical deflection device includes: a fixed supporting member; a coil supporting member fixed on the fixed supporting member; a coil fixed on the coil supporting member; a rotary body having a...
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6310710 |
High-resolution reading and writing using beams and lenses rotating at equal or double speed
A scan systems include at least one radiation source for directing at least one beam toward a spinning scan device. The scan device reflects these beams as rotating scan beams to track rotating...
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6292285 |
Single rotating polygon mirror with v-shaped facets for a multiple beam ROS
A single rotating polygon mirror with v-shaped facets having upper and lower reflective facet surfaces reflects and separates dual beams to two photoreceptors in a ROS. Each facet surface will have...
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6288819 |
Scanning image forming lens and optical scanning apparatus
A scanning and image forming lens system in an optical scanning apparatus optical scans a surface to be scanned by deflecting a luminous flux emitted from a light source in a direction...
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6288818 |
Optical scanning apparatus
An optical scanning apparatus includes a plurality of light sources which emit first and second beams. First and second coupling lens units respectively couple the first and second beams emitted by...
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6288817 |
High duty cycle synchronized multi-line scanner
A scanner includes a single scanning element such as a holographic disc or a polygon mirror and an illumination system that provides a plurality of input beams that are directed to different areas...
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6285482 |
Optical deflecting-scanning apparatus
An optical deflecting-scanning apparatus includes a deflector for deflecting a light beam to scan, a driving device for rotationally driving the deflector, a cover having a cylindrical portion to...
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6266175 |
Scanner with synchronously switched optics
A method of and system a system for generating scan lines having different beam characteristics. In one embodiment, the beam is focused at different distances depending upon the scan line. A system...
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6266174 |
Multi-beam scanning apparatus with controlled scan line bow
A multi-beam scanning apparatus comprises a light source unit for emitting a plurality of beams, a beam deflector for deflecting the plurality of beams from the light source unit, and a common...
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6259546 |
Scanning and imaging lens and optical scanning device
An optical scanning lens is for use in an optical scanning device in which a light beam forming a line image elongated in a direction corresponding to a main-scanning direction is deflected at a...
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6256133 |
Optical scanning apparatus
An optical scanning apparatus is constructed such that a light beam from a light source is formed into a linear image extending in a main scanning direction and is caused to be deflected at a...
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6249366 |
Outboard support for cantilevered air bearing stationary shaft
Motor polygon assemblies having a housing, a cantilevered stationary shaft within the housing, a rotating sleeve, a multifaceted polygon mounted on the rotating sleeve, and a cover over the...
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6243190 |
Light scanning apparatus
A light scanning apparatus includes a deflector for deflecting a light beam emitted from a laser. A rotating reflector is provided in the deflector, and a reflecting surface is formed on the...
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6243187 |
Polygonal mirror device
An annular groove is formed on the upper surface, or a surface C, of a rotor member. A surface D and a surface E of a rotor member, which are located closer to the center than the annular groove...
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6243184 |
Method and apparatus for light scanning
A light scanner includes a beam deflector supported for rotary motion to deflect an incoming light beam into an image field in response to being rotationally aligned. A motor mechanically couples...
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