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"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
The Quarterly Review ; March edition, 1825
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| Number | Title | Issue Date |
| 7205520 | Portable air defense ground based launch detection system A ground based launch detection system consisting of a sensor grid of electro-optical sensors for detecting the launch of a threat missile which targets commercial aircraft in proximity to a commercial airport or airfield. The electro-optical sensors are configured ... | 04/17/2007 |
| RE39024 | Exposure apparatus having catadioptric projection optical system To use a beam splitting optical system smaller than the conventional beam splitters and to set a longer optical path between a concave, reflective mirror and an image plant. A light beam from an object surface travels through a first converging group to enter a beam... | 03/21/2006 |
| 6801364 | Projection objective for microlithography The invention relates to a projection lens comprising a lens assembly that has at least one first narrowing of the group of light beams. A lens with a non-spherical surface is located in front of and/or behind the first narrowing. ... | 10/05/2004 |
| 6465766 | Sunlight tracking sensor and its use in full-automatic solar tracking and collecting device A sunlight tracking sensor has light sensing faces for receiving light signals from all directions. The light sensing faces are arranged in four quadrants. Each quadrant of the light sensor can sense light signals in two coordinate axes direction. The lig... | 10/15/2002 |
| 5529262 | Guidance seeker for small spinning projectiles A guidance seeker for a spinning projectile defined by its angular momentum vector, comprises a lens system or a millimeter-wave antenna for receiving radiation derived from a target and forming an image of the target. The lens system has a reticle having... | 06/25/1996 |
| 4286760 | Photoelectric direction finder A direction finder including downstream the reticle an intermediate objective and a four quadrant detector, the reticle providing a modulation at a given frequency and in which the intermediate objective comprises preferably a half-ball lens whose center ... | 09/01/1981 |
| 4124865 | Automatic reticle detection and tracking method and system A reticle superimposed upon an observation scene is detected by electronically discriminating the reticle from the rest of the observation scene to thereby define a coordinate system. The reticle is identified in an observation scene by recognizing that a... | 11/07/1978 |
| 4028544 | Radiant energy detection system A radiant energy detection system for discriminating between radiation from a target and ambient radiation wherein optical receiver means is arranged to produce two images of the observed field which are staggered along the direction of displacement of mo... | 06/07/1977 |
| 4014482 | Missile director A line of sight guidance system is provided in which the radiated output of a pulsed laser is spatially modulated to produce a beam radiated from an optical projector containing all informational requirements to enable a missile launched into the beam to ... | 03/29/1977 |
| 3944167 | Radiation detection apparatus A radiation sensor including an inner detector surrounded by an array of outer detectors is employed in radiation tracking apparatus which is capable of tracking a true target in a field of targets which may include a decoy or false target. The apparatus ... | 03/16/1976 |
