Bizarre Patents
Cloaking System Using Optoelectronically Controlled Camouflage
A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.
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| Number | Title | Issue Date |
| 6250923 | Resorbable implant A dental implant for anchoring in bone, wherein said bone comprises an outer cortical bone section and an inner cancellous bone section is made of a body of resorbable material such as coral, having a portion capable of being wedged into the cancellous bo... | 06/26/2001 |
| 6134952 | Dissolved solid analyzer On-line measurements of an amount of dissolved solids in a liquid sample are determined by using both conductivity and UV measurements. More particularly, an amount of dissolved solids in a pulp and paper mill process water or effluent is determined by ir... | 10/24/2000 |
| 6137896 | Method of recognizing faces using range images Faces are one of the most commonly recognized features among people. According to the invention a system for recognizing intensity images of faces is provided. Intensity images of a face are captured and normalized. The intensity images are transformed, f... | 10/24/2000 |
| 6131635 | Device for longitudinally splitting pieces of straw into separated strands A straw splitter for longitudinally splitting pieces of cereal straw into separated strands for use in making a panel, board or beam is provided. A cutting shear roller and a gripping shear roller are rotatable around their longitudinal axis at different ... | 10/17/2000 |
| 6125220 | Interferometric optical device including a resonant optical cavity A method and circuit is disclosed wherein two beams exiting opposite ends of a resonant optical cavity, such as a Fabry-Perot (FP) etalon for example, are provided via waveguides or via free space directed by mirrors to a combining region where the beams ... | 09/26/2000 |
| 6091866 | Optical isolator A multi-stage optical isolating device having at least three stages includes birefringent crystals for separating shifting and combining an incoming beam of light into orthogonal polarized beams. The multi-stage device also includes at least three Faraday... | 07/18/2000 |
| 6084977 | Method of protecting a computer system from record-playback breaches of security A record-playback attack on a security system involves recording authorisation information such as passwords and playing them back to the server at a later time to unlawfully access a system. A method is disclosed for detecting record-playback of biometri... | 07/04/2000 |
| 6076167 | Method and system for improving security in network applications A method of enhancing network security is provided for a communication session initiated between a first computer and a second other computer. From the first computer to the second computer in communications therewith a process for securing communications... | 06/13/2000 |
| 6072891 | Method of gathering biometric information In the past, user authorization based on biometric information was conducted by correlating a single instance of biometric information against a template. By using this method, a percentage of the population is difficult to authenticate. Further, due to s... | 06/06/2000 |
| 6059462 | Optical coupling system The present invention relates to a coupling element for coupling between optical elements, for instance a ferrule encased fiber end and a lens, two lenses, or filter and lens assemblies, which provides a reliable joint with a determined spacing and angula... | 05/09/2000 |
| 6058330 | Transcutaneous energy transfer device In the design of transcutaneous energy transfer devices, variation in spacing between coils results in energy transfer efficiency changes. These changes may have significant effect on a system. It is proposed to provide a plurality of implanted coils for ... | 05/02/2000 |
| 6055347 | Multi-pass optical filter An optical filter is provided having first and second graded index (GRIN) lenses preferably disposed in a coaxial relationship so that they have a common optical axis. Each of the GRIN lenses has an end face providing a port at predetermined location. The... | 04/25/2000 |
| 6055112 | Lensed cascaded optical filter A multi-pass optical filter using two identical filters provides narrower band filtering by double filtering an optical signal passing therethrough. Although passing a beam of light at an optical filter having a substantially thick optical thickness is kn... | 04/25/2000 |
| 6055104 | Optical attenuator A polarization beam splitter combiner uses a birefringent crystal that is a fraction of the size of conventional crystals used in similar devices. Since the crystal is considerably shorter in length, the beam passing through the crystal can be uncollimate... | 04/25/2000 |
| 6052468 | Method of securing a cryptographic key A method is disclosed for improving portability of secure encryption key data files. The method provides for re-securing key data files according to different security processes for mobility. For porting an encryption key secured using a fingerprint authe... | 04/18/2000 |
| 6044185 | Optical switch module A system of interconnected functionally identical modules for switching P optical signals to P locations in a non-blocking manner is disclosed. Each of the functionally identical modules provides a same function, which may or may not be provided in an ide... | 03/28/2000 |
| 6043887 | Polarimeter The state of polarization of an input light beam is tested by determining four components of a Stokes vector of the light. These correspond to components of the light in three polarization states, S1 : linear horizontal, S2 : linear ... | 03/28/2000 |
| 6044187 | Multi-port fiber optical device A useful device is provided for coupling or splitting optical signals from one port to another. The symmetry of a lens is utilized in a manner whereby two linear arrays of optical ports are disposed adjacent the optical axis of the lens equidistant from t... | 03/28/2000 |
| 6040932 | Method and circuit for demultiplexing an optical signal A system and method are disclosed for demulitplexing closely spaced channels carrying optically encoded data. A composite optical signal having data channels corresponding to center wavelengths λ1, λ2, λ3, λ4, . . . λn are separated into two com... | 03/21/2000 |
| 6028323 | Quantum well infared image conversion panel and associated methods A method for infrared (IR) imaging using a panel made of integrated GaAs quantum well infrared photodetector (QWIP) and near-infrared (NIR) or visible light emitting diode (LED). The panel is a large area diode with an optical window for top illumination ... | 02/22/2000 |
| 6026189 | Method of recognizing objects within two-dimensional and three-dimensional images A new method is presented for efficient and reliable object recognition within noisy, cluttered, and occluded range images. An image is captured and quantized into cells having characteristics. A tree data structure is provided wherein each node of the tr... | 02/15/2000 |
| 6023065 | Method and apparatus for monitoring and controlling characteristics of process effluents A method and an apparatus for monitoring and controlling a characteristic of process waters or effluents from wood pulp bleaching, pulping and paper making processes utilizing a bleaching agent such as hydrogen peroxide (H2 O2), Na | 02/08/2000 |
| 6018603 | Optical demultiplexing/multiplexing device having a wavelength dependent element A device capable of demultiplexing or multiplexing optical signals includes a wavelength dependent element for separating an input beam into sub-beams of light in accordance with their wavelength. Precisely spaced optical fibers are disposed to receive at... | 01/25/2000 |
| 6018421 | Multilayer thin film bandpass filter A novel design for producing bandpass filters with essentially square shapes with little or no ripple in the passband zone. Filters are of the all-dielectric type consist of multiple cavities of bandpasses. Quarter wave thick layers of low index material ... | 01/25/2000 |
| 6016487 | Method of searching three-dimensional images In the past, databases containing three dimensional images were searched by keywords and indexes. For such functionality, a set of keywords must be associated with each image. This is usually performed by a person and is prone to errors. It has now been f... | 01/18/2000 |
| 6016375 | Wavelength selective fiber to fiber optical tap Light is coupled out of a first mono-mode optical waveguide such as an optical fiber an into another single mode waveguide through a substantially planar slab waveguide. The first mono-mode optical waveguide has a grating impressed within which has refrac... | 01/18/2000 |
| 6014254 | Optical device for splitting an input beam into two orthogonal polarization states An optical fiber having a small numerical aperture (NA) is optically coupled with a short birefringent crystal to provide a polarization beam splitter. This arrangement obviates the use of a GRIN lens coupled between an input optical fiber and the birefri... | 01/11/2000 |
| 6014256 | Polarizing beam splitter/combiner A polarization beam splitter combiner uses a birefringent crystal that is a fraction of the size of conventional crystals used in similar devices. Since the crystal is considerably shorter in length, the beam passing through the crystal can be uncollimate... | 01/11/2000 |
| 6014484 | Method and device for optical coupling A method and circuit is provided for more efficiently coupling light between two optical waveguides such as optical fibres. When the two waveguides are coupled to spaced apart collimating lenses such as GRIN lenses, the beam propagating between the spaced... | 01/11/2000 |
| 6011652 | Multilayer thin film dielectric bandpass filter The present invention relates to a multi-layer dielectric bandpass filter having a primary and a secondary passband. A secondary passband outside the reflection zone of the primary passband is optimized to reduce ripple achieving a passband of at least 90... | 01/04/2000 |
| 6011623 | Fault detection system for an amplified optical transmission system A fault detection circuit and method of detecting catastrophic faults for example from a total line outage due to a transmission waveguide being inadvertently cut, includes tapping a sample of the amplified transmission multichannel signal light for analy... | 01/04/2000 |
| 6009359 | Mobile system for indoor 3-D mapping and creating virtual environments A mobile mapping system is designed to generate a geometrically precise three-dimensional detailed model of an unknown indoor environment. There is no limit on the distance the mobile system may travel, nor on the type of details that can be mapped. The s... | 12/28/1999 |
| 6005993 | Deflection optical matrix switch This invention relates to a method and apparatus for switching an optical signal from one or more input ports to one of a plurality of output ports. A beam is launched into the input port. By controllably switching a switching element, such a liquid/air s... | 12/21/1999 |
| 6005994 | Optical switching gate The present invention relates to an optical logical AND gate comprising an erbium doped waveguide which is attenuating at a signal wavelength and responsive to pump light energy to be transmissive at a signal wavelength. A first laser pump excites a porti... | 12/21/1999 |
| 6002479 | Apparatus and method for light spectrum measurement An apparatus and method for in situ spectral measurement is disclosed. The apparatus uses a low-resolution grating to disperse light and thereby image a spectrum thereof. The imaged spectrum is converted into a digital electrical signal and is processed i... | 12/14/1999 |
| 5999322 | Multilayer thin film bandpass filter A novel design for producing bandpass filters with essentially square shapes with little or no ripple in the passband zone. Filters are of the all-dielectric type that consist of multiple cavities of bandpasses with the first and last cavities consisting ... | 12/07/1999 |
| 5995874 | Transcutaneous energy transfer device In the design of transcutaneous energy transfer devices variation in spacing between the coils results in energy transfer efficiency changes. These changes may have other causes. It is proposed to use an autotuning circuit and a voltage control circuit in... | 11/30/1999 |
| 5991431 | Mouse adapted to scan biometric data In the past, contact imaging devices were large and costly. It has been proposed that for contact imaging device adoption for the personal computing market, cost and size must be reduced. In an attempt to address these concerns, a biometric pointing devic... | 11/23/1999 |
| 5991076 | Optical circulator An at least 3-port optical circulator has first group of optical components, and a second group of optical components, the first group being separated from the second group by an optical distance "1". Each group of optical components has a divider and com... | 11/23/1999 |
| 5991023 | Method of interpreting spectrometric data A method for spectral measurement is disclosed. The method uses a low-resolution grating to disperse light and thereby image a spectrum thereof. The imaged spectrum is converted into a digital electrical signal and is processed in order to enhance the spe... | 11/23/1999 |
