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 |
| 4772786 | Photothermal oscillator force sensor A sensor comprises a beam, e.g. of silicon, which resonates at a frequency dependent on the force imposed on the beam. Light on a line induces resonance of the beam by means of the photothermal effect. The light reflected from the beam is amplitude modula... | 09/20/1988 |
| 4768880 | System and method for accurate loop length determination in fiber-optic sensors and signal processors A technique and system for accurate determination of differential propagation delays in fiber-optic circuits. The method includes providing a sinusoidally modulated optical signal to each of two waveguides defining optical paths. The optical signals recei... | 09/06/1988 |
| 4758087 | Fiber optic transducer An optical physical condition sensor includes an optical fiber resonant cavity into which optical energy, including wavelengths resonatable within the cavity, is introduced. External physical conditions, such as temperature or pressure, change the effecti... | 07/19/1988 |
| 4755668 | Fiber optic interferometric thermometer with serially positioned fiber optic sensors A single fiber optical fiber temperature measuring device is provided for in vivo determination of temperature at a plurality of spaced points. The device includes a fiber optical temperature sensing device having at least first and second optical fiber s... | 07/05/1988 |
| 4738527 | Apparatus and method for determining position with light Apparatus and method is disclosed for determining position with light by providing input light at an input light port of an optical cavity having a variable length dimension and detecting light which has traversed the variable length dimension at an outpu... | 04/19/1988 |
| 4733561 | Self-oscillating, optical resonant sensor Light from a source is communicated to a measurand site. Interferometric means located at the measurand site modulates the light by means of a resonator, the frequency of which is related to the measurand value, said resonator being driven by the modulate... | 03/29/1988 |
| 4728191 | Divided interferometer employing a single 3×3 coupler/splitter Fiberoptic sensors are disclosed employing one, two, or more optical fibers which are connected to a single source of coherent light through a single 3×3 coupler/splitter thereby retaining a larger portion of the coherent light in the system.... | 03/01/1988 |
| 4705354 | Method for fiber optic transmission of a special coded measurement A method wherein two light fluxes I1 and I2, spectrally encoded by interspersing or alternating line frequency spectra, are transmitted through an optical fiber from a transducer to an evaluation unit which generates an indication si... | 11/10/1987 |
| 4682500 | Pressure sensitive element A pressure sensitive element having a pair of light reflecting thin films formed through a thin film producing process and composing a Fabry-Perot resonator which is arranged so as to face a light transmitting system, and a diaphragm laminated on the ligh... | 07/28/1987 |
| 4678909 | Optical pressure sensing apparatus Optical pressure sensing apparatus comprises an optical fibre interferometer arranged to sense the movement of a pressure responsive element and produce an interference signal at its output which can be monitored and processed to measure changes in the pr... | 07/07/1987 |
| 4647203 | Fiber optic sensor An optical fibre Fabry-Perot etalon can be used as a sensor if the parameter being monitored is allowed to influence the etalon's length, e.g. by pressure, temperature, magneto-strictive effects, piezo-electric effects, acoustically, etc. However, with si... | 03/03/1987 |
| 4627728 | Compensated Fabry Perot sensor A sensor responsive to magnetic field strength employs a feedback control loop operating on a piezoelectric stretcher element (13) to maintain a predetermined phase relationship between the optical path lengths of first and second Fabry Perot optical fibe... | 12/09/1986 |
| 4572669 | Method and apparatus for a Fabry-Perot multiple beam fringe sensor A method and, in one embodiment of the invention, the resulting apparatus for implementing a unique multiple beam fringe sensor that is adapted to be interfaced with a low cost, compact fiber optic transmission system in order to provide an accurate digit... | 02/25/1986 |
| 4558950 | Interferometric distance and direction measurement For interferometric measurement of the length of the linear component of movement of a moving point relative to a fixed point and simultaneous recognition of the direction of that movement, two merged or overlapping Fabry-Perot part interferometers are us... | 12/17/1985 |
| 4536088 | Polarimetric Fabry-Perot sensor A polarimetric Fabry-Perot sensor comprising a source of coherent polarized light, an optical cavity, preferably an optical fiber, capable of supporting two independent modes of that light and coated with partially reflecting material on both ends, a sens... | 08/20/1985 |
| 4533829 | Optical electromagnetic radiation detector An optical electromagnetic radiation detector having a probe for receiving nearby electromagnetic radiation. The probe includes a loop antenna connected to a pair of transparent electrodes deposited on the end surfaces of an electro-optic Fabry-Perot inte... | 08/06/1985 |
| 4533247 | Optical transmission system An optical transmission system comprises a light source, which may be coherent or incoherent, a first optical interferometer wherein light from the source is modulated, an optical path, which may be either free space or an optical fiber, along which the m... | 08/06/1985 |
| 4530603 | Stabilized fiber optic sensor A fiber optic sensor comprises a length of optical fiber, forming a loop, and a fiber optic directional coupler for optically closing the loop. The loop and coupler form a resonant cavity for light circulating therethrough. A PZT cylinder, about which the... | 07/23/1985 |
| 4475812 | Cavity coupled optical condition sensor An optical sensor has a gain medium situated at a first location and defines one end of a resonating optical cavity. An optical fiber couples electromagnetic radiation to a predetermined point at a second location where it is directed toward a reflective ... | 10/09/1984 |
| 4417815 | Measuring apparatus Apparatus for measuring or detecting changes in a variety of physical or chemical parameters comprises an interferometer having a transmission frequency variable over a range of frequencies as a function of changes in the parameter. The transmission frequ... | 11/29/1983 |
| 4360272 | Fiber optic energy sensor and optical demodulation system and methods of making same A fiber optic energy sensor and optical demodulation system is disclosed wherein the signal energy to be sensed or detected causes an etched single mode fiber to be stretched or compressed which causes the optical path length for electromagnetic radiation... | 11/23/1982 |
| 4329058 | Method and apparatus for a Fabry-Perot multiple beam fringe sensor A method and the resulting apparatus for implementing a unique multiple beam fringe sensor that is adapted to be interfaced with a low cost, compact fiber optic transmission system in order to provide an accurate digital representation of a physical param... | 05/11/1982 |
| 4293223 | Method and apparatus for controlling resonant frequency of an optical interferometer cavity An apparatus and method for controlling the resonant frequency of an optical interferometer cavity having a part having a dimension defining the resonant frequency. An electrical conductor adapted for connection to a source of electrical potential is moun... | 10/06/1981 |
| 4057321 | Spectroscopically selective filter device A spectroscopically selective filter device for light which is being conveyed in a waveguide disposed on a substrate characterized by at least two Bragg reflectors with distributed feedback which are disposed at spaced given intervals on a surface of the ... | 11/08/1977 |
