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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 |
| 4871220 | Short wavelength pass filter having a metal mesh on a semiconducting substrate A short pass filter is disclosed which exhibits high transmission in the infrared and/or visible region of the electromagnetic spectrum and which has high rejection in the microwave portion of the spectrum. The filter generally consists of a substrate of ... | 10/03/1989 |
| 4870746 | Method of making a multilayer printed circuit board having screened-on resistors A method is disclosed for manufacturing multilayer printed circuit boards in which one or more layers thereof, including intermediate layers, may include one or more screened on resistors. The method is particularly well suited for use where large numbers... | 10/03/1989 |
| 4804269 | Iterative wavefront measuring device A wavefront reconstruction and measuring system detects incoming light waves with a wavefront sensor having an array of photodetectors. The sensor provides a data processor with signals indicative of phase differences between sample points on the wavefron... | 02/14/1989 |
| 4763991 | Adjustable six degree of freedom mount for optical components An adjustable mount for optical components is disclosed which permits a component held by the mount to be adjusted with six degrees of freedom. The mount includes means for locking the components of the mount to prevent vibration from affecting the adjust... | 08/16/1988 |
| 4754331 | Digitizer for an image processing system An analog video signal obtained from a television camera having a 4:3 aspect ratio is converted into a square array of N×N square pixels corresponding to the pixel content in the center of the television camera by apparatus which includes an analog-to-di... | 06/28/1988 |
| 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 |
| 4660042 | Cancellation system for transmitter interference with nearby receiver Interference from frequency modulated transmitter signals, such as radar jamming signals, is cancelled in a nearby receiver by orthogonally related cancellation signals derived from the transmitter signal. The cancellation signals are controlled or modula... | 04/21/1987 |
| 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 |
| 4635297 | Overload protector An overload protector, using a power-dissipating element for receiving and dissipating excessive radio-frequency power, can safely transfer a signal from an input to an output. The protector also has a detector coupled to the input for providing a bias cu... | 01/06/1987 |
| 4625390 | Two-step method of manufacturing compressed bismuth-containing garnet films of replicable low anisotropy field value The invention relates to a two step method of manufacturing a magnetically switchable magneto-optic element comprising compressed bismuth-containing garnet film of low anisotropy field value deposited on a monocrystalline gadolinium garnet substrate. The ... | 12/02/1986 |
| 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 |
| 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 |
| 4584484 | Microscope for producing high resolution images without precision optics A microscope, not employing conventional optical elements, is disclosed wherein a sample under examination is subjected to a moving pattern of illumination having alternate light and dark interference fringes, and having a spatial frequency which varies d... | 04/22/1986 |
| 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 |
| 4544239 | Compressed bismuth-containing garnet films of replicable low anisotropy field value and devices utilizing same The invention relates to a magnetically switchable magneto optic composite comprising an epitaxial film supported on a non-magnetic garnet substrate. The film is a bismuth-containing film which is in compression, contains a combination of cations providin... | 10/01/1985 |
| 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 |
| 4501091 | Apparatus for preparing an optical workpiece A drum is mounted to rotate about its drum axis. A pair of elongated, complementary guides are proximate to and extend along the axial length of the drum. The guides are sized and spaced to allow a workpiece to span the guides and roll upon them. A driver... | 02/26/1985 |
| 4478676 | Method for decreasing radial temperature gradients of crystal growth melts utilizing radiant energy absorptive materials and crystal growth chambers comprising such materials A method for reducing the radial temperature gradient of a radiant energy emitting heated body is described. The method comprises insulating such heated body with a refractory insulating material containing an efficient absorber of the radiant energy emit... | 10/23/1984 |
