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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7370973 | Displaying optical system and image projection apparatus A compact displaying optical system capable of reducing a speckle noise and a loss of light amount is disclosed. The displaying optical system which projects images using coherent light, comprises a light source which emits the light; and a polarization control unit... | 05/13/2008 |
| 7355719 | Interferometer for measuring perpendicular translations An interferometer provides a large dynamic range for perpendicular displacement measurements. In operation, a measurement reflector on an object reflects a measurement beam to an overlying Porro prism, and a reference reflector on the object returns a reference beam... | 04/08/2008 |
| 7330214 | Diaphragm apparatus of lens for CCTV camera A diaphragm apparatus of a lens for a CCTV camera includes a diaphragm blade which opens and closes a stop aperture of the diaphragm apparatus; and an ND filter which is attached to the diaphragm blade, the ND filter having a spectral transmittance so that the trans... | 02/12/2008 |
| 7280218 | Apparatus and method to facilitate laser gyroscope ionization An apparatus and method is provided for facilitating ionization of a gas medium of a laser gyroscope. The apparatus and method employ a solid state light emitting device as a start aid for the laser gyroscope. The solid state light emitting device has a wavelength a... | 10/09/2007 |
| 7239393 | Calibration method for a lithographic apparatus and device manufacturing method A calibration method comprising generating a pattern with an array of individually controllable elements, providing a substrate table with a radiation sensor, using radiation to generate an image of the pattern at the substrate table, moving at least one of the gene... | 07/03/2007 |
| 7239379 | Method and apparatus for determining a vertical intensity profile through a plane of focus in a confocal microscope An assembly is provided for the direct measurement of a vertical intensity profile through a plane of focus of a confocal microscope, a determination of a depth of the confocal plane and a maximum intensity of the intensity profile. The assembly includes a transpare... | 07/03/2007 |
| 7225737 | Method for automated platemaking A computer-to-plate (CTP) machine is operated using processless printing plates. A plate bender is built directly into the CTP, bending the plate after imaging in order to make it ready for mounting on the printing press, eliminating all intermediate steps. For pres... | 06/05/2007 |
| 7095921 | Laser apparatus, exposure head, exposure apparatus, and optical fiber connection method An optical fiber of a bundled fiber light source is an optical fiber whose core diameter is uniform but whose emission end cladding diameter is smaller than an incidence end cladding diameter thereof, and a light emission region thereof is made smaller. An angle of ... | 08/22/2006 |
| 7050716 | Exposure device In order to provide an exposure device by which aligning of an exposure pattern is realized when manufacturing a build up wiring board or the like, an exposure device which exposes a photosensitive material with a light beam modulated in accordance with image inform... | 05/23/2006 |
| 7035449 | Method for applying a defect finder mark to a backend photomask making process A back-end method for photomask making generally includes the steps of inspecting a photomask and repairing each defect on the photomask. The step of inspecting the photomask preferably comprises a defect finder mark implementation routine. In general, when inspecti... | 04/25/2006 |
| 7005219 | Defect repair method employing non-defective pattern overlay and photoexposure A method for repairing a defective photomask having contained therein a minimum of one defect within a defective pattern employs a non-defective photomask for purposes of photoexposing a photoresist layer formed upon the defective photomask such as to form a pattern... | 02/28/2006 |
| 6995781 | Print head and image forming apparatus A print head comprises a plurality of light emitting devices which are arranged such that the adjacent light emitting devices are stepped from each other in the rotation direction of a photosensitive member, or a plurality of light emitting devices which are dispose... | 02/07/2006 |
| 6928198 | Exposure head The present invention provides, in order to obtain a desired focal depth t in a range α of an acceptable increased amount of beam diameter, an exposure head is designed so that the ratio D/W of an output beam width D to a beam width W at the position where a digita... | 08/09/2005 |
| 6832045 | Exposure device In order to provide an exposure device by which aligning of an exposure pattern is realized when manufacturing a build up wiring board or the like, an exposure device which exposes a photosensitive material with a light beam modulated in accordance with image inform... | 12/14/2004 |
| 6421507 | Method of producing a screen for a display device, screen for a display device produced by means of said method and display device provided with said screen A screen having a dotted structure of apertures in a black matrix and electroluminescent material in the apertures is produced on a panel for a color display device. A photosensitive material on the panel is exposed to light emitted by a point source. The... | 07/16/2002 |
| 5812892 | Multi-beam image forming system Disclosed is a multi-beam image forming system, which has a light emitting unit including a plurality of light sources emitting a plurality of beams, and a table carrying a photosensitive film on which an image is formed with the plurality of beams. A sen... | 09/22/1998 |
| 5589900 | Virtual drum imagesetter An imagesetter of the "internal drum" type for producing an image on a flexible section of photosensitive material. The section of material has a first end, an opposite second end and substantially parallel side edges extending between the first and secon... | 12/31/1996 |
| 5404187 | Virtual drum imagesetter An imagesetter of the "internal drum" type for producing an image on a flexible section of photosensitive material. The section of material has a first end, an opposite second end and substantially parallel side edges extending between the first and secon... | 04/04/1995 |
| 5317338 | Visual measurement technique and test pattern for aperture offsets in photoplotters A test pattern including an aperture image and a line image including a plurality of parallel lines, forming a measurement graticule, overlapping the aperture image, permits determination of dimensions for correction of alignment of image centerlines by i... | 05/31/1994 |
| 5168304 | Exposure apparatus An exposure apparatus for selectively exposing the peripheral portion of a circular substrate such as wafer for integrated circuit manufacturing purposes. In this exposure apparatus, the spot of an exposure light beam from a projecting system is projected... | 12/01/1992 |
| 5051762 | Production of images using an array of light emitting diodes Apparatus and imaging method in which an LED exposure apparatus having an array of light emitting diodes stationed in a light exposing relationship to a photosensitive material to be imaged is calibrated to take into account the wavelength difference betw... | 09/24/1991 |
| 5027137 | Drawing surface adjusting mechanism for use with scanning pattern drawing apparatus A drawing surface adjusting mechanism for use with a scanning pattern drawing apparatus capable of not only moving a drawing board in a vertical direction but also tilting it, whereby the chance of bringing the drawing surface within the depth of focus of... | 06/25/1991 |
| 5017949 | Table assembly for pattern drawing apparatus A table assembly that is simple in construction and which yet resists yawing in an effective way and is adapted for use with a scanning pattern drawing apparatus which involves continuous movements of the table. The inventive table assembly includes a mas... | 05/21/1991 |
| 4958233 | Digital and analog image recording apparatus A multi-mode image recording apparatus which can record on a common photo-sensitive sheet either an analog color image produced by reflecting white light off an original or a digital color image produced by modulating one or more infrared lasers according... | 09/18/1990 |
| 4940641 | Aperture disc and method of making the same An indexing system for selectively orienting one of a series of arcuately oriented different sized and/or shaped apertures formed around an aperture disc used in a photohead for exposing upon a photosensitive surface detailed graphic information using a l... | 07/10/1990 |
| 4926348 | Plotting apparatus using a light source moved on a photosensitive surface A plotting implement for creating a record on a photosensitive surface. The plotting implement includes a contact tip for contacting and for moving between different positions on the surface, the contact tip in use constituting an electromagnetic radiatio... | 05/15/1990 |
| 4899175 | Recording system with illumination means utilizing a plurality of fluorescent substances An illumination apparatus adapted for illuminating a subject with light comprises a plurality of fluorescent substances each having a different spectral characteristic, a drive device for repetitively locating the fluorescent substances at a predetermined... | 02/06/1990 |
| 4866593 | Photosensitive printing apparatus A printing apparatus for use in a printer with a photo-sensitive drum. The printing apparatus includes a spotlight source for generating a light provides essentially a point source. A photo-optical converter which is optically coupled to the spotlight sou... | 09/12/1989 |
| 4851656 | Method and apparatus for enhancing optical photoplotter accuracy A novel method and apparatus for improving the overall accuracy and repeatability of an optical photoplotter which is characterized by a controller which determines an image position error from interferometric feedback signals and position command signals... | 07/25/1989 |
| 4849777 | Lamp driver scheme A system for projecting a spot of radiant energy includes a lamp for projecting a light spot onto a surface and includes means for providing a selection of differently sized spots. Drive means moves the light spot relative to the surface and is capable of... | 07/18/1989 |
| 4841316 | Photohead system for positioning an aperture wheel and method of making an aperture disc An indexing system for selectively orienting one of a series of arcuately oriented different sized and/or shaped apertures formed around an aperture disc used in a photohead for exposing upon a photosensitive surface detailed graphic information using a l... | 06/20/1989 |
| 4835545 | Modulating laser intensity in a laser printer proportionately to the velocity of the photoconductive media A photosensitive, photoconductive media moving in a first direction relative to a laser light beam scanning in a second direction, transverse to the first direction, incurs velocity variations. These velocity variations result in variations in the absolut... | 05/30/1989 |
| 4816847 | High resonance drive table and method of making a planar work surface A highly accurate positioning system used in connection with the photoplotter assembly employing a dual axis drive system having low mass and low inertia components. The drive elements of the system are low cost, high tensile strength drive bands that ori... | 03/28/1989 |
| 4815721 | Film loader and unloader mechanism A loader and unloader mechanism is attached to a standard photoplotter equipment. The mechanism performs a sequence of operations for loading and unloading sheets of film onto and from respectively such equipment completely automatically.... | 03/28/1989 |
| 4812861 | Optical laser beam control device for printer A laser beam control device related to the present invention includes an optical filter in the path of propagation of the laser beam from a laser light source to an image forming surface to form an image with the laser beam transmitted through the filter,... | 03/14/1989 |
| 4809028 | Photoplotting apparatus A light pen for converting a conventional graphics plotter into a photoplotter includes a housing containing an electrically powered light source, a battery and a normally open switch. The housing has an aperture opposite the light source. The light pen r... | 02/28/1989 |
| 4797696 | Beam splitting apparatus An apparatus for splitting radiant energy beams produced by a laser or other light source. The apparatus comprises a plurality of mirrors, each aligned to reflect a beam or plurality of beams from one mirror to the next. Each mirror comprises a glass body... | 01/10/1989 |
| 4796038 | Laser pattern generation apparatus A laser pattern generation apparatus particularly suited for semiconductor applications. The laser beam is split into a plurality of beams and modulated with acousto-optic modulators. A rotating mirror having a plurality of facets causes the beam to scan ... | 01/03/1989 |
| 4760412 | Apparatus and method for exposing lines on a photosensitive surface In a photoplotting apparatus and method using a flash lamp to expose a line on a photosensitive surface, and wherein the photohead has a number of apertures of different size to vary the width of the generated line, the quality of line drawn with each ape... | 07/26/1988 |
| 4757327 | Photoplotter radiant source output equalization method A computer controlled photoplotter includes a row of LED's mounted to a light head positioned parallel to the film width. The light head is part of a light head assembly which is moved parallel to the film length. At the end of each pass the light head is... | 07/12/1988 |
