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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4940318 | Gradient membrane deformable mirror having replaceable actuators A deformable mirror is disclosed having replaceable, electrically operable actuators for deforming the mirror's reflecting surface. A flexible retraction membrane is disposed between the actuators and the reflecting surface and the mirror's facesheet is b... | 07/10/1990 |
| 4730235 | Cascadable carrier for high power semiconductors or other electronic components A carrier for electronic components which generate heat during their operation, such as high power semiconductors, is disclosed. The carrier includes complementary ends which are designed to permit the second end of a first carrier to abut and overlap the... | 03/08/1988 |
| 4723315 | Polarization matching mixer A method of mixing light from a signal source with light from a local oscillator for heterodyne or homodyne detection using differential detection techniques is described. In the method and apparatus of the invention, incoming light is matched to the pola... | 02/02/1988 |
| 4710966 | Digital frame processor pipe line circuit A plurality of digital words representing picture elements are sequentially loaded into a readin register, which words are thereafter written in parallel into a random access memory via a write data register. The words are subsequently readout of the rand... | 12/01/1987 |
| 4696573 | Dual shear wavefront sensor A wavefront of light is focused upon a first shearing interferometer having a relatively large shear and small dynamic range and a relatively minor portion of the light is focused upon a second shearing interferometer having a relatively small shear but l... | 09/29/1987 |
| 4692027 | Spatial processing for single or dual shear wavefront sensor A shearing interferometer produces a matrix of loops of wavefront phase difference vector signals derived from the interferogram indicative of wavefront slopes, where each loop corresponds to a sub-aperture portion of the wavefront under examination. Curl... | 09/08/1987 |
| 4689823 | Digital image frame processor A frame processor for processing digitized image information includes a memory for storing a two-dimensional array of pixels, logic circuits for controlling the writing and reading of information into the memory, an arithmetic and logic unit having two in... | 08/25/1987 |
| 4689246 | Method of fabricating a PbS-PbSe IR detector array A silicon wafer is provided which does not employ individually bonded leads between the IR sensitive elements and the input stages of multiplexers. The wafer is first coated with lead selenide in a first detector array area and is thereafter coated with l... | 08/25/1987 |
| 4688086 | Method of imaging a target illuminated through an optically distorting region A target is illuminated through an optically distorting region, such as atmospheric turbulence or non-precision optics, by coherent light and a first set of data is recorded indicative of the complex amplitude of scattered radiation and such target is the... | 08/18/1987 |
| 4682032 | Joule-Thomson cryostat having a chemically-deposited infrared detector and method of manufacture An infrared photodetector is disclosed which is deposited directly onto a Joule-Thomson cryostat. The cryostat includes an elongated body having gas-carrying channels contained therein. The photodetector is deposited directly onto one end of the elongated... | 07/21/1987 |
| 4680628 | Realtime digital diagnostic image processing system A fluoroscopic image is processed digitally using a television camera operating at a frame rate of at least 30 frames per second viewing the image and providing an analog video output, a digitizer which digitizes the analog video output to provide digital... | 07/14/1987 |
| 4674848 | Laser mirror having a cooled, deformable surface A laser mirror having a cooled deformable reflecting surface is disclosed. The mirror's base includes a manifold for distributing coolant toward the mirror's faceplate and for receiving coolant which has circulated through the faceplate. The faceplate is ... | 06/23/1987 |
| 4657358 | Cooled deformable mirror A cooled deformable mirror having a continuous mirror surface and a method for cooling a deformable mirror having a continuous mirror surface are disclosed. In the preferred embodiments, one or more enclosed spaces within the mirror's faceplate are suppli... | 04/14/1987 |
| 4655563 | Variable thickness deformable mirror A lightweight deformable mirror suitable for space applications is disclosed in which a plurality of electrically-operated electrodistortive actuators may be used to selectively deform the mirror's reflecting surface. The actuators are sandwiched between ... | 04/07/1987 |
| 4654876 | Digital image motion correction method A method of image motion distortion correction involving the steps of electronically scanning an optical image to produce first and second lines of stored digital pixel data indicative of the intensity of picture elements of the optical image, registering... | 03/31/1987 |
| 4637724 | Shearing interferometer employing an acousto-optic cell An improved shearing interferometer is provided having an acousto-optic cell wherein two sets of orthogonal diffraction gratings are formed therein by applying two electrical signals thereto having different frequencies. A wavefront to be examined is pass... | 01/20/1987 |
| 4619451 | Drive roller biasing mechanism Four pairs of paper drive rollers are provided which may be individually adjusted so that proper balancing of the bite pressures result. The same springs employed for this purpose are also utilized to maintain the mechanism locked and to provide rapid and... | 10/28/1986 |
| 4620240 | Wide band tape recorder interface for recording digital image data in real time Incoming data from one of two data channels is coupled through a multiplexer to a ping pong memory. While data is being read into one section of the ping pong memory from the data processing equipment, it is being read out of the other side of the ping po... | 10/28/1986 |
| 4618214 | Method of fabricating a controlled harmonic binary grating A method of fabricating a controlled harmonic grating having both binary magnitude and phase transmissions in which specified harmonics are enhanced and/or suppressed. The summing of a number of binary pulse trains produces a controlled harmonic grating t... | 10/21/1986 |
| 4602158 | PbS-PbSe IR detector arrays A silicon wafer is provided which does not employ individually bonded leads between the IR sensitive elements and the input stages of multiplexers. The wafer is first coated with lead selenide in a first detector array area and is thereafter coated with l... | 07/22/1986 |
| 4597652 | Paper guide with width sensing and width indication system First and second rotatable edge guide rollers are provided having precision roller positioning means for preventing skewing of sheets of predetermined widths, such rollers being laterally shifted in position to accommodate various widths by means of a rol... | 07/01/1986 |
| 4588268 | Tip-tilt mirror actuation system having simplified driver circuitry Groups of electromechanical actuators affixed to a movable mirror are coupled to the mirror along radial lines extending from the central portion thereof. The actuators in each of such groups have variable sensitivity of mechanical response per volt appli... | 05/13/1986 |
| 4580894 | Apparatus for measuring velocity of a moving image or object Apparatus for measuring the velocity of a moving image or object including a first array of sensors extending in a first direction transverse to image motion for sensing a primary set of image elements; a second array of sensors extending generally in the... | 04/08/1986 |
| 4578810 | System for printed circuit board defect detection An automatic printed wiring board (PWB) defect detector is described. The detector comprises an array of optical sensors for optically inspecting a printed wire circuit. The array forms a binary image pattern of the PWB which is tested for compliance with... | 03/25/1986 |
| 4575248 | Wavefront sensor employing novel D.C. shearing interferometer A wavefront sensor employs a novel DC shearing interferometer which produces four interferograms which are 90° phase shifted with respect to each other. The incoming wavefront is replicated into two beams, a portion of each being reflected off of a beams... | 03/11/1986 |
| 4562467 | Data compression apparatus and method for encoding and decoding multi-line signals Apparatus and method for encoding and decoding a signal which is divided into a plurality of signal lines, each of which is a successive line of pixel signal values taken from a two-dimensional informational field. The apparatus for encoding includes the ... | 12/31/1985 |
| 4555162 | Method of fabricating long period optical grating A long period buried optical grating is fabricated by polishing a number of single crystal silicon wafers to identical thicknesses and flat figure, applying a light reflective metallic coating to the wafers, thereafter bonding the wafers together in a sta... | 11/26/1985 |
| 4537492 | Heater-drier for fusing toner images on wet printing plates A simple, reliable heater-fuser station for fusing toner images upon relatively stiff, resilient and moist printing plates includes a curved heater-platen positioned between a pair of entrance squeegee rollers and a pair of exit rollers. The angles betwee... | 08/27/1985 |
| 4536069 | Two rotary blade camera shutter A first apertured shutter rotates almost a full revolution in a first direction, and a second apertured rotary shutter rotates almost a full revolution in an opposite direction before the apertures of both blades are present at the optical axis to effect ... | 08/20/1985 |
| 4533219 | Tip-tilt mirror actuation system employing a single control voltage An array of electromechanical actuators are positioned beneath a movable mirror and have movable contacts which are affixed to the upper surface of a resistive mat having a single voltage gradient applied across the mat to control the tilting of the mirro... | 08/06/1985 |
| 4532546 | Real time single frame memory for converting video interlaced formats Circuitry for converting interlaced video data to non-interlaced video data at 30 frames per second, real time video rate, where rows of successive lines of video data applied to a single frame memory are provided having data control means including readi... | 07/30/1985 |
| 4531160 | Display processor system and method A technique for reproducing an image in a set of grey scale steps is disclosed including: providing a plurality of superpixels for providing an output representative of an image; providing a set of threshold levels for each pixel in a superpixel, which se... | 07/23/1985 |
| 4518854 | Combined shearing interferometer and Hartmann wavefront sensor A sensitive wavefront sensor combining attributes of both a Hartmann type of wavefront sensor and an AC shearing interferometer type of wavefront sensor. An incident wavefront, the slope of which is to be detected, is focussed to first and second focal po... | 05/21/1985 |
| 4506303 | Optical data recorder system An optical data recording system and method for receiving an input data stream to be recorded on a recording medium; dividing the input data stream into a series of data sections; compressing each data section in the series into a period shorter than the ... | 03/19/1985 |
| 4503336 | Beam former having variable delays between LED output signals A beamformer device for forming at least one beam from the outputs of a sensor array, including: a plurality of radiation sources; means for providing to each radiation source a signal from an associated one of the sensors in the sensor array; a detector ... | 03/05/1985 |
| 4500202 | Printed circuit board defect detection of detecting maximum line width violations An automatic printed wiring (or circuit) board (PWB) method for detecting maximum line width violations is described. The method utilizes an array of optical sensors for optically inspecting a printed wire circuit. The array forms a binary image pattern o... | 02/19/1985 |
| 4474467 | Wavefront sensor using a surface acoustic wave diffraction grating A wavefront sensor for detecting the slope of an input wavefront. A surface acoustic wave reflective diffraction grating is positioned at a focal point of the wavefront, and generates surface acoustic waves at two primary frequencies f1 and f | 10/02/1984 |
| 4472713 | Optical encoder with integral flexible coupler An optical encoder assembly includes an integral flexible coupler. A flange extending from the flexible coupler serves as a bearing retainer to hold a disc table and unitary bearing shaft in fixed axial position relative to the bearing. The bearing is fur... | 09/18/1984 |
| 4472029 | Integrated wavefront compensator An integrated wavefront compensator for an active optics system in which the components for detecting distortions in a wavefront and the components for correcting the detected wavefront distortions are integrated into one unit. The parallel processing cha... | 09/18/1984 |
| 4466735 | Half tone screen exposure apparatus A half tone screen of a graphic camera is uniformly exposed by a pinhole light projector positioned off axis with respect to the main optical projection axis. A light diffuser is positioned intermediate a light source and the pinhole has a variable densit... | 08/21/1984 |
