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| Number | Title | Issue Date |
| 7535635 | Transparent meter register cover with integral light pipe The invention provides a method and a transparent housing cover for a meter index for communicating optical signals through an optical port formed on a front face of the transparent housing cover, for further communicating optical signals in a straight line past one... | 05/19/2009 |
| 7375621 | Vehicle parking apparatus A distance indicating apparatus and method determine the distance between a fixed object and a moving object (such as a motor vehicle, airplane or water vessel) by using two spaced-apart projectors to project a distance indicating scale (which can include non-linear... | 05/20/2008 |
| 7312878 | Method for manufacturing a scale, a scale manufactured according to the method and a position measuring device In a method for producing a scale in the form of a phase grating, the scale itself, and a position measuring device including the scale, the scale includes two reflection layers located at a distance from one another on either side of a spacer layer. The production ... | 12/25/2007 |
| 7299557 | Tilt sensor A tilt sensor has a source for optical radiation, a pattern support having an optically effective pattern for the passage of the optical radiation generated by the source, a tilt-sensitive unit downstream of the pattern support in the direction of propagation of the... | 11/27/2007 |
| 7256938 | Method for making large scale multilayer dielectric diffraction gratings on thick substrates using reactive ion etching Methods of fabricating large size, high performance multilayer diffraction gratings having a thick substrate that take advantage of reactive ion etching during the fabrication process are provided herein. In one implementation, a method of making a multilayer diffra... | 08/14/2007 |
| 7228634 | Using viewing-angle-sensitive visual tags to determine angular orientation and/or location One embodiment of the present invention provides a system that uses a visual tag to determine an angle. During operation, the system observes the visual tag from an observation point, wherein the visual tag includes an angle-sensitive image which changes in appearan... | 06/12/2007 |
| 7204419 | Method and apparatus for reading firearm microstamping An indicia for marking on an object, such as a cartridge case, for representing selected information, such as identification indicia identifying the firearm that discharged the cartridge, and methods and apparatus for generating, imprinting and reading the identific... | 04/17/2007 |
| 7124046 | Method and apparatus for calibration of camera system, and method of manufacturing camera system A first mirror and a second mirror are disposed in such a manner that their reflective surfaces are parallel and face toward each other. A mark is drawn between the first mirror and the second mirror. An image of the reflections of the mark in the first mirror and t... | 10/17/2006 |
| 7111423 | Method and apparatus for reading firearm microstamping An indicia for marking on an object, such as a cartridge case, for representing selected information, such as identification indicia identifying the firearm that discharged the cartridge, and methods and apparatus for generating, imprinting and reading the identific... | 09/26/2006 |
| 7043850 | Transparent measuring device with seam allowance guide A transparent measuring device having a planar structure, a plurality of markings, at least one window, and a seam allowance guide. The planar structure has an upper surface and a lower surface, and the markings are formed on the lower surface of the planar structur... | 05/16/2006 |
| 6967791 | Illumination systems and methods System and method for illuminating a target area with a desired illumination pattern. According to preferred embodiments of the invention, a cartridge-engaging assembly may be positioned adjacent a data cartridge, light may be emitted from at least one light source ... | 11/22/2005 |
| 6961174 | Reflectometer and method for manufacturing a reflectometer A reflection-type graduation having a silicon substrate. The silicon substrate has first subsections formed thereon. Each of the first subsections has etched oblique surfaces. The surfaces are positioned so that light beams directed incident to the surfaces cause no... | 11/01/2005 |
| 6809859 | Optical filter and fluorescence spectroscopy system incorporating the same An optical filter including at least one substrate and first and second thin-film interference filters disposed directly on the substrate. The interference filters include a plurality of hard coating thin film layers of alternating high and low index of refraction. ... | 10/26/2004 |
| 6671092 | Reflective measuring scale graduation and method for its manufacture A reflective measuring scale graduation, as well as a method for manufacturing the same are described. The reflective measuring scale graduation includes first and second subdivisions having different reflection properties, which extend in at least one fi... | 12/30/2003 |
| 6552861 | Optical guide fixture The present invention provides an optical guide fixture for coupling visual information on a surface to a viewer. The optical guide fixture of the invention can be coupled to an optical receiver, such as a digital camera, operably connected to a head-moun... | 04/22/2003 |
| 6366401 | Clear container with magnifying feature A transparent or partially transparent container is described with a convex portion on one side wall and an image adhering to an opposite and spaced apart second side wall which appears magnified as viewed through the convex opening. The magnified image i... | 04/02/2002 |
| 6359742 | Weldable sightglass assembly The invention provides a sightglass assembly for viewing the interior of a vessel, such as a reaction vessel for chemical or biochemical reactions, and is adapted to be welded to a vessel wall. The sightglass assembly comprises a window disc fused to a me... | 03/19/2002 |
| 6263166 | Exposure count indicator for camera A camera has a rear cover part, and a rotatable counter dial with a numerical scale of exposure count indicia to be successively viewed. Each of the indicia has the same color. A label on the rear cover part is superimposed to the counter dial and has the... | 07/17/2001 |
| 6259864 | Exposure count indicator for camera A camera has a rear cover part, a label on the rear cover part, and a numerical scale of exposure count indicia to be successively viewed. The numerical scale of exposure count indicia is located on the label, and each of the indicia has the same color. A... | 07/10/2001 |
| 6191899 | Emergency visual assistance device An emergency visual assistance device which provides an operator at an operator station access to operationally necessary visual information when that visual information is obscured by smoke or other vision-obstructing matter, and a method for using that ... | 02/20/2001 |
| 6166857 | Optical guide fixture The present invention provides an optical guide fixture for coupling visual information on a surface to a viewer. The optical guide fixture of the invention can be coupled to an optical receiver, such as a digital camera, operably connected to a head-moun... | 12/26/2000 |
| 6141147 | Optical unit for image projection and tool incorporating same An optical unit for projecting an image including first and second locating lines for substantially eliminating the introduction of visual parallax error. In one preferred form, the optical unit is incorporated into a machine for performing a forming oper... | 10/31/2000 |
| 5880882 | Scale and method for making a scale A scale for opto-electrical linear or angular measuring systems. A gradation in the form of a phase grating is embodied on the scale and has alternating raised and stepped areas. A continuous compensating layer of chrome and on it a continuous highly refl... | 03/09/1999 |
| 5754348 | Method for context-preserving magnification of digital image regions A method for digital image magnification in a graphical user interface is disclosed. In contrast with prior methods which magnify a selected region of an original image without preserving its context, the present method provides a method for magnification... | 05/19/1998 |
| 5742577 | Prism has a plurality of reflective regions each with a predetermined phase difference In an optical pickup apparatus, including a laser source arranged along an optical axis, a polarization beam splitter and an objective lens, wherein light emitted from the laser source is emitted on a recording plane of an optical-magnetical recording med... | 04/21/1998 |
| 5737122 | Illumination system for OCR of indicia on a substrate An illumination system is provided having one or more light sources, opaque baffles, and mirrors for illuminating indicia on a substrate, such as a semiconductor wafer, for viewing by a camera aligned parallel with or at an angle to the substrate. The lig... | 04/07/1998 |
| 5731766 | Route guide system and method A route guide system for making guidance of the traveling direction in the sight field of the driver during traveling. The road guide plate is provided in front of a turning point. This road guide plate emits light differing in flash timing according to t... | 03/24/1998 |
| 5485012 | Method and apparatus for blind optical augmentation A support-measure to pinpoint and neutralize electro-optical viewing devi or systems is provided which utilizes blind optical augmentation. The counter-measure uses a light source to which current viewers are blind and a combination of visible and far in... | 01/16/1996 |
| 5469294 | Illumination system for OCR of indicia on a substrate An illumination system is provided having one or more light sources, opaque baffles, and mirrors for illuminating indicia on a substrate, such as a semiconductor wafer, for viewing by a camera aligned parallel with or at an angle to the substrate. The lig... | 11/21/1995 |
| 5390625 | Driver's overhead indicator for automobile A driver's overhead indicator for automobile is a device using a reflecting plate in front of an instrument panel the image of which can be reflected through a secondary reflection onto a projecting plate which is installed on top of a dashboard. Both the... | 02/21/1995 |
| 5251038 | Solid state imager with a condenser lens on a photo sensor The present invention is directed to a CCD solid state imager in which a utilization efficiency of light and a sensitivity of a sensitive unit (pixel) can be increased and a smear can be reduced by improving a shape of a micro-condenser lens formed on the... | 10/05/1993 |
| 5231536 | Robust, LED illumination system for OCR of indicia on a substrate Double banks of LED's, opaque baffles, and a camera having a field of view are disclosed for reading laser-etched character strings and other indicia on semiconductor wafers and other substrates. The LED's of the banks may be integrally or separably lense... | 07/27/1993 |
| 5221999 | Automotive display apparatus The automotive display apparatus consists of an indicator, a transmissive first reflector plate, a second reflector plate, and a face plate. The face plate has a rear surface the upper portion of which is inclined at an angle larger than the inclined angl... | 06/22/1993 |
| 5204775 | Device for magnifying indicia printed on a container A device for magnifying indicia printed on a container is provided. The device is designed to be releasably mounted to a prescription vial or other medication container to permit visually impaired individuals to read easily the label information relating ... | 04/20/1993 |
| 5193032 | Universal prescription bottle instruction label magnifier A device for use as a magnifying implement is disclosed which has a housing member designed to accommodate prescription bottles of various popular sizes therein in a fixed position. A longitudinally moveable magnifying lens slideably mounted in the housin... | 03/09/1993 |
| 5023451 | Indicia contrast enhancement for vehicle borne infrared vision system In conjunction with a vehicle borne infrared receiver, sign indicia are defined by infrared reflective surfaces oriented so as to reflect infrared radiation to the receiver from a contrast enhancing source of radiation such as the sky and/or the ground th... | 06/11/1991 |
| 4966429 | Optical scale reading apparatus Optical scale reading apparatus in accordance with the invention includes an optical fibre 30 for directing light from a light source 22 on to a scale 10. Light from the scale is reflected into a readhead 12 of any suitable construction. The fibre is desi... | 10/30/1990 |
| 4643523 | Telescoping water meter reading apparatus A meter reading apparatus includes a telescopic tubular viewer attached to the underground meter and provides a clear sight path through water in the meter box for easy meter reading. In a first embodiment, the viewer member is connected to the meter by a... | 02/17/1987 |
| 4261204 | Conduit for guiding fiber optic viewing device A system and apparatus by which an observer outside a building can read the indices of an instrument located within the building and can check the presence of combustible gas in the atmosphere within the building, comprising a guide tube extending between... | 04/14/1981 |
| 4247169 | Lens barrel capable of axial zooming operation and with barrel window A zoom lens barrel capable of indicating adjusted distance and focal length is of compact construction having only those members essential for focusing and zooming. No special scale member is provided, although a focal length or zoom ratio scale extends c... | 01/27/1981 |
