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| Number | Title | Issue Date |
| 4950962 | High voltage switch tube A high voltage switch tube with a central cathode cylindrically symmetric to and surrounded by a tubular anode, with a grid interposed between the cathode and anode. A high negative voltage is applied to the cathode, but the flow of electrons to the anode... | 08/21/1990 |
| 4854669 | Optical image processor with highly selectable modulation transfer function An optical image processor utilizes a source of partially coherent light and a spatial filter with a highly selectable modulation transfer function for processing an image, which may be present in real time. The spatial filter contains electro-optic mater... | 08/08/1989 |
| 4723263 | X-ray source An X-ray source with a cathode formed as a cylindrical electrode having a hollow central anode tube on its axis, with a grid surrounding the anode and interposed between the anode and cathode. The central anode tube is hollow and filled with a working med... | 02/02/1988 |
| 4710939 | X-ray frequency down converter A pre-excited excimer laser is formed in a thin flat package. Input X-ray photons which are modulated by passing through a body to be analyzed raise the pre-excited excimer gas molecules to a lasing energy level and the coherent radiation produced is meas... | 12/01/1987 |
| 4700076 | Solid-state X-ray receptor and method of making same An X-ray receptor for producing electrical signals representative of an X-ray image. An array of semiconductor elements is mounted on at least one support, each element being formed of semiconductor material which is (1) an element of Group 4A of the Peri... | 10/13/1987 |
| 4670894 | X-ray source employing cold cathode gas discharge tube with collimated beam An X-ray tube has a wide area cold cathode with a graphite felt surface which faces and is spaced from a wide area anode of high atomic number material. A grid is interposed between the two and the anode, grid and cathode are enclosed in an envelope which... | 06/02/1987 |
| 4653855 | Apparatus and process for object analysis by perturbation of interference fringes Objects to be examined, such as tissue or any cellular or crystalline material, e.g. semiconductor wafers, are placed in a region of confluence of two interfering coherent beams of radiation which are at the same frequency and phase and at a frequency to ... | 03/31/1987 |
| 4647154 | Optical image processor An optical processing system based on noncoherent light processing employs both geometrical and diffraction optical systems. One portion of the optical system performs a subtraction operation of the image from itself where one of the subtracted images is ... | 03/03/1987 |
