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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6137601 | Incoherent erasure joint transform correlator A holographic grating is written into a photorefractive erasable holographic member and a light beam having a first wavelength which includes the joint power spectrum of a pair of joint images to be correlated is directed at the photorefractive member to ... | 10/24/2000 |
| 6134059 | Color filter, production process thereof, and liquid crystal panel Disclosed herein is a color filter equipped with a plurality of colored light-transmitting areas on its base, wherein the light-transmitting areas are colored with ink dots, and each of the colored portions is continuously formed over a plurality of the l... | 10/17/2000 |
| 6102547 | Illumination device An illumination device having a light-emitting tube and a reflector for reflecting rays of light irradiated from the light-emitting tube is designed so that the cross-sectional shape of at least one section of the reflector in a plane perpendicular to the... | 08/15/2000 |
| 6099141 | Roadside emergency security flashlight A flashlight for use in emergency situations includes a front light, a rear light, a translucent body with lights underneath to serve as a light beacon, and pivotable legs for supporting the flashlight in a freestanding position. When the legs are pivoted... | 08/08/2000 |
| 6094283 | Holographic display with switchable aspect ratio A holographic display system comprising left and right optical systems is disclosed. The optical systems each comprise an image display operable to display an input image and first and second holographic devices. The first holographic device is operable t... | 07/25/2000 |
| 6091534 | Compact scanning optical system A compact optical system for and method of forming an image on an intermediate image-forming surface such as a photoreceptor drum at a high speed. An image-forming light source such as a laser light source is placed between an image-focusing element such ... | 07/18/2000 |
| 6078442 | ND filter In a concentric ND filter in which multi-layered circular ND filter elements whose diameter is decreased stepwise toward the uppermost layer from the lowermost layer are concentrically provided on a first transparent substrate, a surrounding space of the ... | 06/20/2000 |
| 6078420 | Hole-coupled laser scanning system An all-reflective optical system uses a mirror with a hole to transmit a focused laser beam to an on-axis elliptical mirror. The reflected beam from the ellipse is predominately reflected off the mirror with a hole and focused to a distant adjustable focu... | 06/20/2000 |
| 6074073 | Extension device for decorative lamps An extension device for decorative lamps includes a position base, a connection base, a lamp socket and conductors. The lamps and the power wires can be combined in various shapes and configurations by means of the extension devices. Then all power wires ... | 06/13/2000 |
| 6069724 | Optical scanning lens and optical scanning apparatus An optical scanning apparatus includes an optical scanning lens composed of a single lens which is arranged and adapted to correct for placement errors of optical elements. The shapes of both surfaces of the optical scanning lens are non-arc in a deflecti... | 05/30/2000 |
| 6043912 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to e... | 03/28/2000 |
| 6028689 | Multi-motion micromirror Provided is a movable micromirror assembly wherein a mirror is mounted on, e.g. four flexible support arms, which are mounted in turn on a center support post. The post and arms resiliently support such mirror over, e.g. four address electrodes. The micro... | 02/22/2000 |
| 6025939 | Continuously tunable laser A multi-line continuous wideband tunable laser (1) utilizes a symmetric or asymmetric grating (5) and a plurality of optical fibers (3), each of which forms a part of a respective laser cavity optical axis. By simultaneously altering both the periodicity ... | 02/15/2000 |
| 6024455 | Reflective article with concealed retroreflective pattern A reflective article has a multilayer film covering a patterned retroreflective layer. In one embodiment the patterned retroreflective layer includes a separate indicia layer covering a retroreflective substrate. The indicia are substantially hidden under... | 02/15/2000 |
| 6020983 | Method for the manufacture of eye-covering articles bearing decorative reflection holograms A method is provided for the manufacture of a holographic eye-covering article, the eye-covering article having an interference pattern corresponding to a predetermined three-dimensional object holographically prerecorded in a planar hologram layer, the i... | 02/01/2000 |
| 6021005 | Anti-aliasing apparatus and methods for optical imaging An anti-aliasing filter for use in an incoherent imaging system reduces the resolution of the optical image to prevent aliasing, without requiring a reduction in the amount of light captured by the system, and without adversely affecting image quality or ... | 02/01/2000 |
| 6020984 | Light beam scanning apparatus using a rotating hologram and a fixed hologram plate A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as an optical lens or a mirror having curvature, and capable of compensating for disadvantages including scanning ... | 02/01/2000 |
| 6021009 | Method and apparatus to improve across field dimensional control in a microlithography tool A technique for improving across field dimensional control in a microlithography tool. In a lithography imaging process in which a pattern on a mask is projected to form latent images in a photosensitive medium, the critical dimension distribution across ... | 02/01/2000 |
| 6018414 | Dual band infrared lens assembly using diffractive optics An infrared lens assembly (16, 60 and 80) operative in the near and far infrared wavebands to focus infrared radiation at an image plane (15) of an infrared detector (18). The infrared lens assembly (16, 60 and 80) includes a focusing component (33, 63 an... | 01/25/2000 |
| 6018418 | Polarization beam splitter An improved polarization beam splitter formed by a collimator and two similarly shaped, birefringent crystal prisms is provided. The light from the collimator is incident upon the first face of the first birefringent crystal prism which also has second an... | 01/25/2000 |
| 6017139 | Electronic candle An electronic candle having a configuration to emulate that of a wax candle such as a wide cylinder votive candle. The electronic candle contains circuitry to cause emission of random light flickers when activated and a spring loaded two piece switch/time... | 01/25/2000 |
| 6018409 | Multi-beam scanning apparatus A multi-beam scanning apparatus includes at least two optical sources, a beam deflector having a deflection disc with a plurality of sectors for diffracting and transmitting incident beams, and a driving source for rotating the deflection disc, for deflec... | 01/25/2000 |
| 6018419 | Diffuse reflectors Highly efficient diffusely reflecting multilayer mirrors diffusely reflect light incident upon them. Highly efficient diffusely reflecting multilayer polarizers diffusely reflect light of one polarization while diffusely transmitting the other polarizatio... | 01/25/2000 |
| 6014251 | Optical filters based on uniform arrays of metallic waveguides A spectral filter is made in the form of a wafer of nanochannel glass having an array of substantially uniform parallel hollow channels of from about 0.1 microns to about 10 microns that are coated with a reflective material.... | 01/11/2000 |
| 6005714 | Two layer optical elements An optical element is formed as a body having two layers, at least on of which is transmissive to a selected wavelength of a light of illumination. One layer is formed with a first surface relief optical formation as a boundary thereof, and the other laye... | 12/21/1999 |
| 6002499 | Real time fingerprint sensor and verification system A real time fingerprint verification system includes a recording device and a verification device each having a fingerprint scanner for generating a flat, dimensionally undistorted, high contrast, fingerprint image, and an intensity sensitive, spatial lig... | 12/14/1999 |
| 5999280 | Holographic anti-imitation method and device for preventing unauthorized reproduction A holographic anti-imitation method and device is provided, which can prevent a creative graphic design from unauthorized reproduction. The holographic anti-imitation method and device provides the creative graphic design as a hidden pattern in a synthesi... | 12/07/1999 |
| 5999316 | Light valve with rotating polarizing element The present invention provides light valves including polarizing elements in which light transmission can be controlled by rotating at least one of the polarizing elements about an in-plane axis. Although reflective polarizing elements are preferred in de... | 12/07/1999 |
| 5993024 | Light fixture having drain grooves A light fixture includes a base having a recess defined in the top thereof and a first passage defined through the base and communicating with the recess. Two first holes are defined through the bottom and communicate with the outside of the base. A socke... | 11/30/1999 |
| 5995251 | Apparatus for holographic data storage A holographic data storage apparatus having no readout lens. The apparatus has a spatial light modulator (SLM), a focusing element such as a lens, a holographic data storage material and a spatial light detector such as a CCD. The lens is located between ... | 11/30/1999 |
| 5995267 | Time division multiplexing multiple beam raster output scanning system A time division multiplexed laser emits two beams of the same wavelength but orthogonal polarization or two beams of different wavelengths from a single laser source for use in a multiple beam raster output scanning system. The multiple beam raster output... | 11/30/1999 |
| 5991063 | Optical scanning device An optical scanning device includes a light source having a plurality of light-emitting portions, a deflector for deflecting a plurality of light beams emitted by the light source, optical elements for guiding the plurality of light beams emitted by the l... | 11/23/1999 |
| 5991072 | Light filtering lens film A lens film is used in filtering visible, infrared, and ultraviolet light. The lens film has one or more metallized layers stacked together. Each metallized layer has a substrate with a metal coating covering one face of the substrate. One or more protect... | 11/23/1999 |
| 5990990 | Three-dimensional display techniques, device, systems and method of presenting data in a volumetric format A system and method generate volumetric, three-dimensional displays, including displays of images or data. An apparent position of a volumetric image is translated by employing an image translation chamber with various combinations of concave and convex r... | 11/23/1999 |
| 5986779 | Multiple focus lens, an optical head apparatus and an optical information recording-reproducing apparatus Coma of an objective lens occurs depending on the lens-forming condition when plural disks of different substrate thickness are recorded and reproduced. An objective lens according to this invention is not influenced by the coma even if the thickness of t... | 11/16/1999 |
| 5986781 | Apparatus and method for generating diffractive element using liquid crystal display Device, method, and system for recording diffractive high resolution text, pictorial, and/or other graphical information is provided which is particularly suited to recording information that would be difficult to reproduce by typical counterfeiting metho... | 11/16/1999 |
| 5982521 | Optical scanner A magnet is integrally formed with a mirror surface for reflecting off a laser beam. A torsion spring holds the magnet thereon. The torsion spring is made of a shape-memory alloy. A coil generates an alternating magnetic field so as to oscillate the magne... | 11/09/1999 |
| 5982513 | Method and system to align holographic images A method and a system to re-align onto a detector array a holographic image of a Fourier region hologram stored in a medium, with the medium spinning around a first axis, and the hologram being generated by a reference beam and a signal beam. In generatin... | 11/09/1999 |
| 5982539 | Optical device Light input from a first optical fiber is split up into two orthogonally-polarized beams by a polarizing prism. Their polarization planes are rotated by a 45-degree Faraday rotator. The beams are refracted by a birefringent wedge as extraordinary light, a... | 11/09/1999 |
| 5978110 | Holographic optical grating and method for optimizing monochromator configuration This invention comprises a novel apparatus for recording a holographic groove pattern on a diffraction grating blank. The recording apparatus is configured using newly developed groups of analytical equations. The invention further comprises the novel hol... | 11/02/1999 |
