Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7443590 | Imaging apparatus and method, and method for designing imaging apparatus A single-focus imaging apparatus having an array of imaging devices includes an optical system including a first imaging system that produces a focused image, at least one imaging plane on which an image produced through the first imaging system is formed, and a sec... | 10/28/2008 |
| 7437034 | Device for coupling the light of multiple light sources A device for coupling the light of multiple light sources (2, 3) that substantially consists of a reflectance surface (10, 11) for one or more of said light sources (2, 3) and at least one integration rod (14) having an incident surface (... | 10/14/2008 |
| 7428104 | Optical device for the combination of light beams An optical device for combining a first light beam and at least one second light beam includes a first beam splitting device, a second beam splitting device and a position detector. The first beam splitting device splits a first reference beam from the first light b... | 09/23/2008 |
| 7425074 | Display device and display method A concept of improving a resolution by using human's visual characteristics is provided. A display device includes an image forming unit forming an image by using an emitted light and an inputted image signal, a projection unit projecting the image formed by the ima... | 09/16/2008 |
| 7420740 | Device for combination of light of different wavelengths The present invention relates to a method for combining or for splitting the beam paths of substantially nonpolarized light of at least three different wavelength intervals. The splitting or the combining of the beam path of light of those wavelength intervals locat... | 09/02/2008 |
| 7408714 | Method and apparatus for coupling laser beams In a photomask projection system, a photomask mask is illuminated by light from two lasers. A beam from one of the lasers is mixed with a beam from the other laser to provide two mixed beams each containing of portion of the beams from both lasers. The mixed beams a... | 08/05/2008 |
| 7408706 | Neutral white-light filter device A substantially neutral filter across the white-light spectrum is obtained by minimizing the wavelength-dependent effects of filtering components and of reflective coatings on surfaces. The incoming light is captured by a first prism and directed toward the interfac... | 08/05/2008 |
| 7387390 | Single-panel projection system A single-panel projection system (1) includes a lighting device for generating collimated light, a beam splitter (30) for splitting the collimated light into a plurality of collimated beams, a color separator (40) for separating each collimated ... | 06/17/2008 |
| 7354162 | Projector A projector includes: a light source device that emits substantially parallel illumination light; a first lens array having a plurality of first small lenses each of which divides the illumination light coming from the light source device into a plurality of partial... | 04/08/2008 |
| 7351503 | Fused silica pellicle in intimate contact with the surface of a photomask A fused silica pellicle for use on photomasks having increased durability and improved transmission uniformity and birefringence properties. The pellicle is to be intimately secured to the patterned surface of a photomask. ... | 04/01/2008 |
| 7339157 | Illumination device An illumination device, comprising a light emitting diode (11) fixed on a circuit board (12). The illumination device furthermore has an optical element (10) disposed downstream of the light emitting diode (11) in a main emission directio... | 03/04/2008 |
| 7322703 | Light emitting apparatus and projector An light emitting apparatus which illuminates an illumination area has a first light source which emits a first light, a second light source which emits a second light, a wheel which is provided with a transmission filter area which transmits the first light, and a ... | 01/29/2008 |
| 7321468 | Method and optical arrangement for beam guiding of a light beam with beam delay A method for beam guiding of a light beam generated by a light source to a target location along a path distance LS, comprises splitting the light beam on the path distance LS at least once into a first partial beam and a second partial beam, g... | 01/22/2008 |
| 7301686 | Optically controlled optical-path-switching apparatus, and method of switching optical paths An optical signal optical path switching method comprising steps of using a thermal lens based on a distribution of refractive index produced reversibly caused by temperature increase generated in an area of the light-absorbing layer film of thermal lens forming dev... | 11/27/2007 |
| 7289218 | Optical component for directing electromagnetic radiation A passive optical component directs first electromagnetic radiation incident on the component in a first direction and second electromagnetic radiation incident on the component in a second direction to a mutual direction. The optical component comprises an interact... | 10/30/2007 |
| 7284865 | Scrolling device with color separation and projection system incorporating same A scrolling device with color separation and a projection system incorporating same are disclosed. The scrolling device comprises a scrolling shaft and a plurality of dichroic mirrors that are spirally arranged as screw threads on the scrolling shaft. The scrolling ... | 10/23/2007 |
| 7222965 | Optical unit and a projection image display apparatus using the same The present invention provides a projection image display technology capable of correcting astigmatism due to use of a polarized-beam splitter, thus ensuring high-resolution projection images. A wire-grid polarized-beam splitter (or the like) of a flat-plate-like st... | 05/29/2007 |
| 7221515 | Optical diffraction element An optical diffraction element (1) comprises a diffraction layer (4) which is divided into diffraction strips (6) alternating with intermediate strips (8). The diffraction strips comprise nano-elements (10) which are aligned in one... | 05/22/2007 |
| 7215474 | Method and apparatus for combining optical beams According to one aspect of the present invention, an apparatus for optically combining light beams is disclosed. The apparatus includes a set of prism shaped doorways configured to receive output beams from at least one optical device. Each of the plurality of doorw... | 05/08/2007 |
| 7215493 | Imaging system with a lens having increased light collection efficiency and a deblurring equalizer In one form, an imaging system comprises an imager that forms an image of an object in a field of view, a rotationally symmetric lens assembly disposed between the imager and the object, and an equalizer. The rotationally symmetric lens assembly provides increased c... | 05/08/2007 |
| 7213922 | Projector Aspects of the invention provide a projector capable of comparatively easily achieving a contrast ratio higher than the original contrast ratio of the liquid-crystal light valve by a simple mechanism. The illumination light modulated by liquid-crystal light valves, ... | 05/08/2007 |
| 7212254 | Illumination optical system, projection video system using the same, and integral-type video display An illumination optical system includes a light source for emitting a plurality of different colors of light, a plurality of rotating optical scanners, and a plurality of scanning lenses. Each of the optical scanners has a reflecting surface that is formed helically... | 05/01/2007 |
| 7196315 | Eccentric optical system and optical apparatus using same An eccentric optical system forming an optical path where an incident light beam is internally reflected three times to fold the optical path, and then emitted from a transmission surface and imaged on an image surface, and an optical path where the incident light b... | 03/27/2007 |
| 7180674 | Polygonal prism A polygonal prism receives at least one incident light and generates at least one outward light. The prism includes a plurality of planes, with the prism made from one piece of material. ... | 02/20/2007 |
| 7177085 | Multiple imaging system and method for designing same An optical system of the present invention produces multiple simultaneous adjoining images on a single image plane. The optical system includes a first optical sub-system, a second optical sub-system, an aperture stop located between the first optical sub-system and... | 02/13/2007 |
| 7172289 | Projection apparatus with colored light path combination through a transparent optical element A projection apparatus is formed employing a transparent optical element to receive a plurality of colored light bundles from a plurality of light sources along a plurality of optical paths and to emit the plurality of colored light bundles along a substantially com... | 02/06/2007 |
| 7154085 | Object detection method and system A method and system for monitoring a region of interest are presented. Incident radiation is transmitted towards the region of interest with a certain transmitting angle and with a predetermined angular intensity distribution of the incident radiation. The transmitt... | 12/26/2006 |
| 7131740 | Optical system and optical apparatus provided with the same An optical system has a plurality of optical surfaces including a rotational-symmetrical optical surface and a reflection-type varaible optical-property element. The reflection-type variable optical-property element is interposed on the optical path between two opti... | 11/07/2006 |
| 7094452 | Antireflective member and electronic equipment using same An antireflective member with stability and a low reflectance at low cost may be provided by performing an antireflective treatment to a substrate in a molding process of the substrate. A roughened surface with a continuous pattern in a fine pyramidal shape is forme... | 08/22/2006 |
| 7086738 | Optical projection system and method An optical projection system has a parallel light source for producing a parallel light beam. A first color splitter splits the parallel light beam into a first color beam and a color mixing beam. The color mixing beam includes a second color beam and a third color ... | 08/08/2006 |
| 7077325 | Portable instrument for electro-optically reading indicia and for projecting a bit-mapped image A portable instrument incorporates an electro-optical assembly for reading indicia during a reading mode, and for projecting a bit-mapped image during a display mode. A manually operable switch on the instrument is disposed for selecting one of the modes. The image ... | 07/18/2006 |
| 7068887 | Polarization splitting grating couplers A polarization splitting grating coupler (PSGC) connects an optical signal from an optical element, such as a fiber, to an optoelectronic integrated circuit. The PSGC separates a received optical signal into two orthogonal polarizations and directs the two polarizat... | 06/27/2006 |
| 7068699 | Multi-function combat laser for the dismounted soldier A multi-function combat laser is described that uses single or multiple laser sources (laser diodes) in a configuration such that when it is coupled with a dichroic substrate the laser sources outputs are coupled to produce a single desired output. The multi-functio... | 06/27/2006 |
| 7057815 | Optical glass for polarizing optical system, production process therefor and polarizing beam splitter An optical glass for polarizing optical system having a photoelastic constant C in the range of −0.2 to +0.5 [10−8 cm2/N] with respect to a wavelength of 633 nm, the optical glass having the following composition (1): composition (1)... | 06/06/2006 |
| 7048384 | Multiple scene projection system A projection system for presenting infrared scenes having biological and chemical agents, simulants and objects such as battlefield items. The generated scenes are primarily for the evaluation of infrared sensors, cameras and stand-off detectors. The system may have... | 05/23/2006 |
| 7035012 | Optical pulse duration extender An optical pulse extender includes a delay loop formed by a plurality of mirrors and a graded reflectivity beamsplitter. The mirrors and the beamsplitter are configured and aligned such that a pulse to be broadened makes a predetermined number of round trips in the ... | 04/25/2006 |
| 7031069 | Microlithographic illumination method and a projection lens for carrying out the method A microlithographic illumination method for imaging a pattern arranged in an object plane of a projection lens onto an image plane of the projection lens, under which a special means for optically correcting the optical path lengths of s-polarized and p-polarized li... | 04/18/2006 |
| 7018042 | Scanning microscope having an optical component, and optical component An optical component is arranged in the beam path of a scanning microscope. The optical component has a plane entrance surface through which a light beam bundle can be incoupled at an entrance angle, and a plane exit surface through which the light beam bundle can b... | 03/28/2006 |
| 7010194 | Method and apparatus for coupling radiation from a stack of diode-laser bars into a single-core optical fiber A method of coupling laser-radiation into an optical fiber includes providing a stack of diode-laser bars and first and second parallel mirrors, the second mirror is selectively reflective only for one polarization plane of the laser-radiation. Each of the diode-las... | 03/07/2006 |
| 7006163 | Illuminating device and projector using it and built-in display unit An illuminating device comprising a light source for emitting a plurality of light beams (207, 208, 209) of different colors, a plurality of rotating beam scanners (102, 103, 104) and a plurality of scanning lenses (109, 110, 111). The beam scan... | 02/28/2006 |
