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7355615 Optical scanning apparatus  
The optical scanning apparatus includes a light amount reducing filter such as a neutral density filter which has transmittance η nd satisfying an expression η nd =(W 1 /W 0 )/(η AOM ×η ref...
7352377 Exposure device and image forming apparatus  
An exposure device is provided with a shutter member having a slit. The shutter member is provided between a member to be scanned and a housing of a main device unit that has an optical...
7167291 Optical scanning apparatus and image forming apparatus using the same  
An optical scanning apparatus can satisfactorily correct a field curvature caused by spherical aberration in an incidence optical system. A light beam emitted from a light source is guided to an...
6856426 Solid state scanning type optical recording device  
An 8-bit (256 gradient) image is represented using a driver IC of 6-bit (64 gradient) construction to drive a plurality of arrayed optical shutter elements. The image data are divided into 64...
6856335 Optical scanning device for scanning plural surfaces and image forming apparatus using the optical scanning device  
An optical scanning device for scanning plural surfaces including a plurality of laser light units each configured to emit a laser beam, a deflecting device configured to deflect the laser beams...
6847389 Optical beam scanning device and image forming apparatus  
The present invention provides an optical beam scanning device and an image forming apparatus capable of restraining the light amount irregularity in the main scanning direction in the image plane....
6834949 Device for simultaneously holding by suction and transporting a sheet  
A device for holding a sheetlike article on a movable underlying surface for transporting the sheetlike article in at least one direction selected from the group consisting of a direction into and...
6700596 Scanning optical element with light-beam passage  
An optical scanning apparatus includes a light source, a deflector with a deflecting/reflecting surface which deflects an incident light beam from the light source, an imaging optical system...
6688724 Image forming device and image forming method  
An image forming device capable of implementing a change of resolution and capable of forming an image with few linear flaws in a main scanning direction. A recording material is slantedly wound...
6677578 Internal-surface-scanning image recording apparatus  
A light beam modulated with image information has its optical axis moved in a given direction by a light beam moving unit, and reflected successively by a plurality of rotating reflecting mirrors...
6661441 Combined lens, holder, and aperture  
A refractive body includes a lens, holder, and aperture particularly suited for use in raster scanners. The refractive body advantageously can be made from resinous materials, such as plastics, but...
6593951 Optical writing system directed to miniaturization thereof, and image forming apparatus employing it  
Optical systems are disposed in the two symmetrical direction with respect to an optical deflector, and direct the optical beams deflected by the optical deflector into respective surfaces to be...
6489982 Error reduction in a multi-beam scanning optical system, and image-forming apparatus using the same  
A multi-beam scanning optical system which obtains an image by reducing an error between the imaging positions of light beams from a plurality of light sources without any complicated adjustment,...
6411325 Optical unit, and electrophotographic recording device having same  
It is an exemplified object of the present invention to provide an optical unit that can easily and inexpensively align an optical axis of the lens and a beam from a light source during continuous...
6346957 Optical scanning device and image forming apparatus that restrains color aberrations  
The invention provides an optical scanning device for color image formation in which color aberration depending on the variation in the image formation position on the scanned surface caused by the...
6340982 Image forming apparatus and exposure device thereof  
An exposure device in which an image forming lens is disposed in such a posture that the center line of an image forming is out of axial alignment with the center of beam intensity distribution of...
6333756 Optical unit and its manufacturing method and electrophotographic recording device  
The present invention aims at providing an optical unit, its manufacturing method, and electrophotographic device that can easily and inexpensively achieve a reliable latent image formation on a...
6310712 Discrete element light modulating microstructure devices  
A light modulating or switching array (10) having a plurality of discrete protrusions (16) formed of electro-optic material, each of which is electrically and optically isolated from each other....
6288734 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 and a digital copying machine comprises a light source such as a semiconductor laser, an optical...
6275673 Photosensitive unit, light source and image forming apparatus  
A porous photosensitive unit has a transparent conductive layer formed on a surface of a transparent substrate. A photoconductive layer is formed on a surface of the transparent conductive layer. A...
6252618 Method of controlling print registration in an electrophotographic machine  
A method of aligning print images of an electrophotographic machine on a print medium includes providing a plurality of rotating photoconductive drums in the electrophotographic machine. Each of a...
6211897 Printing system and method for improving print quality of laser thermal printers  
A laser thermal printing system and method utilizes a blur filter (3) made of one or more pieces of double refractive crystal material to smooth printing or laser spots or fill up gaps in an array...
6184917 Laser marking method and apparatus and liquid crystal element driving method  
In a laser marking method, wherein a liquid crystal mask having thereon a desired pattern to be marked is scanned with a laser beam to mark an object with the pattern by the laser beam passed...
6169558 Process and apparatus for high speed laser printing using a roller having a convertible structure  
A laser printing process using a rotary light sensitive roller electrically charged by points by a laser beam and intended for receiving onto the charged points particles of a toner powder and then...
6121983 Method and apparatus for a solid state laser scanning architecture  
A solid state laser array is multiplexed using an array of micromirrors to permit high resolution printing in a wide format. Each laser in the laser array and each micromirror in the mirror array...
6061075 Non-systolic time delay and integration printing  
A method for printing or exposing photosensitive media is disclosed herein. The method uses standard spatial light modulators with standard addressing circuitry. The data is written to the device...
6057867 Laser printer with piezoelectric apparatus to reduce banding by adjustment of a scanned laser beam  
A print apparatus includes a photoconductor and a mechanical system for moving the photoconductor past a scan line exposure station. The print apparatus includes a signal generator for providing...
6055005 Color printer with jitter signature matching  
Correcting color banding problems resulting from facet-to-facet jitter in a color imaging device having a multifaceted polygon are corrected by starting each color separation using the same facet....
6037968 Scanned marking of workpieces  
A technique for marking pixels on workpieces by routing a scanned beam to different marking stations to mark individual pixels on the workpieces. A diffractive scan lens focuses the beam. A mark is...
6016156 Image forming apparatus  
The invention avoids an increase in the number of parts and components which form an apparatus for forming an image, and hence, prevents a main body of the image forming apparatus from completed in...
5896162 Led printing head  
In order to improve the resolution of a LED printing head by a comparatively simple method, optical shutters (28) are provided between two rows of rod lens arrays (26) and LED arrays (18)...
5889545 Method and apparatus for image registration in a single pass ROS printer using a rotatable output window with no optical power  
A single pass ROS system provides a plurality of latent images which may subsequently be developed in different colors. The ROS units are initially aligned so that each color image is precisely...
5850247 Image forming apparatus  
An image forming apparatus having an exposure optical system provided with an exposure light source in which light-emitting elements are arranged on a base plate to be line-shaped and with a lens...
5835120 Double-resolution optical system for electrophotographic printer  
Light emitted from an array of light-emitting elements in an electrophotographic printer is transmitted through a birefringent plate that deflects light polarized in a first plane but does not...
5821971 Image registration for a raster output scanner (ROS) color printer  
The present invention is directed to a precise method of registering a plurality of ROS imagers, so as to form sequential registered images on a photoreceptor belt in a single pass. Pairs of belt...
5796421 Positioning apparatus for an optical element in the form of a thin film and a scanning apparatus  
A positioning apparatus of an optical element in the form of a thin film includes at least one positioning element having a surface opposed to the optical element without contacting the same,...
5793408 Optical scanning apparatus with improved structure for adjusting focus position  
An optical scanning apparatus which includes a housing, an optical source which emits an optical beam, a deflector which deflects an optical beam from the optical source, a focusing lens which...
5771055 Laser printer capable of cooling heat generating parts as well as reducing noise  
A novel laser printer is disclosed, in which heat generating parts are positively cooled while reducing the noise generated by a blowing mechanism. A rotor of the motor for rotating a scanning...
5757413 Optical filtering system for a document processing system  
There is provided an optical filtering system intended for use in a raster scanning arrangement for a document processing system. The document processing system includes a laser beam generating...
5745155 Scan uniformity correction  
A raster output scanner (ROS) with a liquid crystal window located at the output of the ROS for correcting the nonuniformity of a light beam generated by the ROS is disclosed. Since the photocells...
5742318 Recording apparatus  
The present invention relates to an image forming system comprising an image forming device for forming an image on a sheet; first feeding rollers arranged at an upstream side of the image forming...
5739842 Image forming method and apparatus using rotated screen with pulse width modulation  
Image forming apparatus and method for forming half tone images by pulse width modulating multi-valued image signals comprises first and second pattern signal generators which generate pattern...
5696616 Scanning method and apparatus  
A scanner has a light sensing unit, and a reflecting unit which reflects light to the sensing unit either directly or indirectly. The reflecting unit receives light from an object being scanned or...
5675431 Raster output scanner having externally mounted mirrors  
Raster output scanner assemblies, and systems which use such assemblies, having mirrors mounted on the outside of an outer frame. Slits in the outer frame enable light to reflect from the mirrors....
5652611 Optical scanning system and image forming apparatus employing same for electrophoto graphically forming images  
An optical scanning system includes a first lens for receiving a light beam from a light source and allowing the light beam to pass therethrough, and a polygon mirror having at least one reflection...
5631687 Laser light radiation device providing reduced laser light spot size  
A laser light radiation device has a light source for emitting laser light which is modulated according to an image signal, a collimator lens for collimating the laser light emitted from the light...
5610652 Electrophotographic image recording apparatus  
In the electrophotographic image recording apparatus, the optical path switching mechanism switches the optical path between an image reading mode and an image recording mode. In the image reading...
5561743 Digital method image forming apparatus and image forming method thereof  
A copying machine for forming an image by scanning a laser beam which is emitted from an optical system on a photosensitive member. Photosensors are provided at optically equivalent positions to a...
5539441 Jitter reduction in an overfilled raster output polygon scanner system  
In an overfilled polygon ROS architecture, fast scan jitter is reduced by uniformly illuminating the overfilled facets. In one embodiment, the collimator lens is designed with a long focal length...
5537214 Reading and writing apparatus with rotating mirror  
A laser beam printer includes a movable mirror which is rotated by a scan mirror motor. Laser light is alternately deflected toward an information reading station and an information writing station...
Matches 1 - 50 out of 143 1 2 3 >