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| Number | Title | Issue Date |
| 6807497 | Laser measurement system with digital delay compensation A method and system for determining and compensating for phase and time errors in an optical receiver. The method and system includes use of a measurement and reference signal; deriving phase and time errors; and providing compensation values to the optical receiver... | 10/19/2004 |
| 6462822 | Method and apparatus for detecting overhead transparencies This invention relates to a method and apparatus for detecting overhead transparencies (OHT), such as a dual OHT. Dual overhead transparencies, preferably, have a coating on one side that is compatible with ink jet-type printers and a coating on the other... | 10/08/2002 |
| 5483336 | Self correcting stereoscopic auto-rangefinder A stereoscopic rangefinder is disclosed for determining the distance of a target object by measuring the angle of parallax of light scattered by the target. The rangefinder includes two arrays of photosensitive elements upon each of which a distinct targe... | 01/09/1996 |
| 5280332 | Method and apparatus for self-correcting, direct sensing coincidence sensor for optical rangefinders A device to precisely determine the angle of parallax formed by a target object of interest and first and second entrances (30, 30') for the purpose of rangefinding for example. The device having photodetectors (46) for sensing the separation of first and... | 01/18/1994 |
| 5262838 | Apparatus and means for binocular, switchable to binocular rangefinder without light loss The invention is directed to an electro-optical rangefinding-type apparatus which uses electronic sensors to detect the position and orientation of the apparatus relative to a fixed point. Data from the sensors is relayed to a microprocessor which can cal... | 11/16/1993 |
