| 摘要 |
1,052,178. Local viewing; photo-electric range finding. ENGLISH ELECTRIC VALVE CO. Ltd. Sept. 2, 1965 [Nov. 30, 1964], No. 48663/64. Headings H4D and H4F. [Also in Division H1] The range of objects in a scene is given by floodlighting the scene with a laser pulse, displaying the scene and providing a further scene display displaced from the first by a second laser pulse, the displacement of an object as between the two displays being proportional to range, Fig. 3 (not shown). The pulse spacing is greater than the two-way transmission time to the farthest object of interest. In the embodiment a storage-display tube includes a planar-concave fibre-optic plate D1, Fig. 2 (not shown), a bi-concave fibre-optic plate D2, and a concave-planar fibre-optic plate D3; a photo-cathode D4 is deposited on the concave surface of plate D1 the electrons from which are focused by electrodes D5, D6 on to an aluminized phosphor D7 deposited on the first curved surface of plate D2. A second photo-cathode D8 receives light from phosphor D7 and the ensuing electrons are focused by electrodes D9, D10 on to a storage mesh D12 of known construction. An electron beam produced by a source D13 floods a phosphor D14 on plate D3. The electron beam between photo-cathode D4 and phosphor D7 is deflected in a predetermined direction and at a known speed during the period following the second laser pulse by means of plates D15 to which is applied a linear sawtooth voltage beginning when the second pulse occurs. Alternatively deflection may begin at the first pulse. Suitable magnitudes of potentials for the storagedisplay tube are quoted. |
