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5995268 |
Multi-beam exposure unit
According to the present invention, there is provided an improved multi-beam exposure unit using a plurality of beams for scanning, in which shifts between the beams are reduced so that images can...
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5986793 |
Optical apparatus
An optical apparatus has a holder which integrally holds a light source for emitting a divergent beam, and a finite focus lens (or a collimator lens) for converting the divergent beam to a...
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5986791 |
Optical scanning device and a scanning lens therefor
An optical scanning device of the present invention includes a simple scanning lens. At least one of opposite surfaces of the lens has a nonarcuate shape, as seen in a polarization plane. At least...
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5982527 |
Inertial stabilization of rotational optical scanners
Method and apparatus are disclosed for stabilizing an optical scanner having a rotational axis and a substrate with facets which are generally pyramidal, the outer diameter of the facets being...
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5982523 |
Tilt correcting optical system
In a light beam scanning system, a light beam deflected by a deflector is focused to form an image on a surface and the image is caused to scan the surface at a constant speed. A tilt correcting...
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5979767 |
Portable multi-directional bar code scanner
An apparatus for scanning bar code on an article comprises a housing with a window; a laser light source for transmitting a laser beam which is disposed in the housing; a first mirror fixedly...
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5977536 |
All-around observation device having a rotatable objective element
An all-around observation device is provided for detecting a field of view having a large solid angle. The all-around observation device comprises an imaging optical system having objective means...
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5973813 |
Reflection type optical scanning system
A reflection type optical scanning system includes a cylindrical lens having positive power in the sub-scanning direction, a deflector, an image forming curved reflection mirror, and an anamorphic...
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5969844 |
Rotor and polygon scanner that incorporates the rotor
A rotor includes a hollow rotating shaft that is supported in a non-contact state by a radial self acting air bearing. The rotor also includes a contacting portion for positioning a rotating member...
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5969843 |
Light source device and light beam scanning optical apparatus
A light beam scanning optical apparatus which writes two lines at one scan on a photosensitive member with light beams emitted from two light sources. A light source unit of the apparatus has a...
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5969347 |
Synchronizing apparatus of a cascade scanning optical system having tilting measurement of reflecting surfaces
A cascade scanning optical system which includes: a first laser scanning optical system having a first polygon mirror, provided with a plurality of first reflecting surfaces, for deflecting a first...
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5966232 |
Scanning optical system
A scanning optical system includes a light source, an optical deflector for deflecting a laser beam emitted from the light source, a first optical element for collimating the laser beam emitted...
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5966231 |
Method and apparatus for aligning multiple laser beams
Compensation for beam separation of multiple laser beams of a laser printer simultaneously scanning a photoconductor drum is automatically made. The time for the lead beam to travel a predetermined...
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5966161 |
Optical element and a scanning optical apparatus using the same
An optical element and a scanning optical apparatus using the same capable of correcting for image plane re-positioning caused by internal distortion of the optical element, particularly,...
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5963356 |
Scanning optical apparatus
A scanning optical apparatus includes a light source portion, a deflector for deflecting a beam from the light source portion, a first optical element for converting the beam from the light source...
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5963355 |
Optical scanning system with single element refractive/reflective Fθ l θ lens
A scanning optical system includes a light deflector and a light emitter which emits a beam of light which scans a scanning surface along a main scanning direction. The beam of light emitted by the...
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5963354 |
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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5963353 |
Optical deflector and adjusting method thereof
In an assembling method of an optical deflection apparatus in which a polygonal mirror is fixed on an outer ring of a radial bearing and an optical scanning is conducted by a rotation of an inner...
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5962838 |
Barcode scanner with manually switchable scan patterns
A scanner with multiple modes of operation producing two or more distinct scan patterns, with each scan pattern optimized for different modes of operation with a manually actuated switching...
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5953147 |
Polygon mirror having high reflectance and uniform reflectance over range of incidence angles
A laser imaging system comprising: a laser for producing a laser beam; and a moving mirror for repetitively reflecting the laser beam over a range of incidence angles to scan the laser beam in a...
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5952649 |
Optical write apparatus with an operation for even charging of photosensitive element
An optical write apparatus includes a light source unit, a first image-forming optic, a beam deflector, a transparent plate, a second image-forming optic, and a photosensitive body, the transparent...
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5946126 |
Laser scanning optical system
Disclosed is a laser scanning optical system wherein light emitted from a laser source is deflected by a polygonal mirror to a scanning target surface via an imaging optical system. The laser...
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5946125 |
Reflective surface coating for a uniform intensity of a polarized beam of a rotating polygon mirror optical scanning system
A three layer dielectric material coating of silicon dioxide/zinc selenide/silicon dioxide is deposited on the reflective surface of the facets of a rotating polygon mirror to provide a uniform...
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5946124 |
Laser scanning unit having a noise reducing portion
A laser scanning unit includes an emitting portion for emitting laser beams, a deflecting portion having a plurality of mirror surfaces at its side portions to deflect the laser beams upon a...
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5943153 |
Lens holding apparatus and a light-beam scanning optical apparatus
A scanning optical apparatus has a convex cylindrical lens and a concave cylindrical lens between a light source for emitting a light beam and a polygon mirror. The cylindrical lenses condense the...
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5933267 |
Rotary polygon mirror type light deflector
In a rotary polygon mirror type light deflector 1, since a ring-shaped polygon mirror 8 is mounted on the periphery of a bearing rotor 3, there exists a clearance between the bearing rotor 3 and...
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5933266 |
Synchronization signal generating circuit for an optical scanning device
An optical scanning device is comprised of a light source unit, a rotating polygon mirror, an fθ lens, a photosensitive drum, a synchronization signal generating circuit 10, etc. Synchronization...
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5933230 |
Surface inspection tool
A laser based inspection tool (LIT) for inspecting planar surfaces is described. In a preferred embodiment the LIT can simultaneously inspect both planar surfaces of disks for use in disk drives....
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5933182 |
Single pass color printer with facet matching
Color banding resulting from facet-to-facet jitter in a color imaging device having a plurality of multifaceted polygons is reduced by matching the facets of the various polygons such that the...
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5930020 |
Beam scan device
In a beam scan device, the distances between a plurality of beams in the scanning plane are decreased as the beams approach the reflecting surface of the rotary polygon mirror, and the distance...
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5930019 |
Light scanning device, optical device, and scanning method of optical device
A light scanning device deflects a plurality of light beams by a deflecting means performs divided scanning on a single scanning line on a photoconductor with the plurality of deflected light...
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5923466 |
Light modulated confocal optical instruments and method
The confocal imaging system and method involve the imaging of a specimen under observation by projecting a light pattern of illumination spots simultaneously on the specimen. This is accomplished...
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5920361 |
Methods and apparatus for image projection
Method and apparatus for a multi-application, laser-array-based image system utilizes three linear laser arrays. Each linear array generates multiple (N>1) parallel output beamlets at one of the...
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5917640 |
Rotatable polygonal mirror unit having adjustable mirrors
An apparatus (5) for measuring the dimensions of an object (1) where a measuring carriage (6) moves the object at a distance thereabove. A polygonal mirror unit (32) receives laser light (16) and...
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5914800 |
Optical scanning system
A predetermined relationship has been found between a number of beams and a ratio a between magnifications in an sub scanning direction. During scanning with a small number of beams, the allowable...
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5910853 |
Rotary polygon mirror optical scanning device
A rotary polygon mirror optical scanning device comprises a fixed shaft and a rotor having a shaft hole, to which the fixed shaft is inserted, and is rotatably supported against an outer perimeter...
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5909300 |
Scanning apparatus having a cascade scanning optical system
Disclosed is a scanning apparatus having a cascade scanning optical system. The scanning apparatus includes: a first laser scanning optical system for deflecting a first scanning laser beam to scan...
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5907424 |
Rotating mirrors
Rotating mirrors and methods for producing rotating mirrors with reduced variation in centrifugal distortion are disclosed. Pins (52) having a density different from that of the remainder of the...
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5907423 |
Scanning optical delay device having a helicoid reflecting mirror
A rapid and linear scanning optical delay line was attained by the use of a helicoid reflecting mirror which was spun by a DC servo motor for bringing about a periodic change in the optical path...
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5903379 |
Scanning optical system
A scanning optical comprises a light source, a rotating mirror for deflecting and scanning a light beam emitted form the light source, a scanning lens for converging the light beam deflected by the...
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5903378 |
Scanning apparatus having a cascade scanning optical system
Disclosed is a scanning apparatus having a cascade scanning optical system. The scanning apparatus includes: a first laser scanning optical system for deflecting a first scanning laser beam to scan...
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5903377 |
Scanning apparatus having a cascade scanning optical system
Disclosed is a scanning apparatus having a cascade scanning optical system. The scanning apparatus includes: a first scanning optical system for deflecting a first scanning laser beam to scan a...
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5901000 |
Sound reduced rotatable polygon assembly
Mirror (1) of a laser printhead has an octagonal outer configuration. During normal use the mirror is rotated at high speed, which drives ambient air which causes noise. To control the noise a...
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5900964 |
Laser scanning device
A scanning optical system for scanning an object surface includes a light emitting device for emitting a beam of light and a deflection mirror rotatable to deflect the beam emitted by the light...
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5900961 |
Scanning optical device
Scanning optical device is provided with a light source unit, a deflector for deflecting light beam from the light source, a deflector driving circuit for driving the deflector and an optical...
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5898514 |
Beam scanning system
An optical beam scanner is provided in which light emitted from a light source and transmitted through a slit formed in a diaphragm plate is made incident upon a polygonal mirror through a...
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5896218 |
Scanning optical systems
A scanning optical system includes a light source for emitting a beam of light and a first optical system that changes a cross-sectional shape of the beam into an oblong shape along a main scanning...
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5892611 |
Laser drawing apparatus
A laser drawing apparatus is provided that splits a laser light into a plurality of drawing beams aligned in a common plane. The aligned drawing beams are reflected and deflected through a...
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5889606 |
Scanning optical apparatus
A scanning optical apparatus includes a light source unit, a deflector for deflectively scanning a light beam from the light source unit, an optical box in which the deflector is accommodated and...
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5886806 |
Scanning optical delay device having a helicoid reflecting mirror
A rapid and linear scanning optical delay line was attained by the use of a helicoid reflecting mirror which was spun by a DC servo motor for bringing about a periodic change in the optical path...
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