Abstract: A reflective array compressor for a fast pattern recognition system. The system includes a combination of digital and analog processing circuitry which allows the system to achieve super computing processing speeds within an open personal computer architecture. The system receives a bit map which is representative of the unknown pattern, such as a picture of an unknown person. The bit map could have multiple people in it--no other system has "faces in the crowd" ability. The bit map associated with the unknown pattern is then pre-processed and compared against a plurality of known patterns in a database to determine how well the unknown pattern correlates with the known patterns. The reflective array compressor employs concave input and output transducers, and curved reflectors.

Abstract: A fast pattern recognition system includes a combination of digital and analog processing circuitry which allows the system to achieve super computing processing speeds within an open personal computer architecture. The system receives a bit map which is representative of the unknown pattern, such as a picture of an unknown person. The bit map could have multiple people in it--no other system has "faces in the crowd" ability. The bit map associated with the unknown pattern is then pre-processed and compared against a plurality of known patterns in a database using a dispersive delay line, to determine how well the unknown pattern correlates with the known patterns.

Abstract: A magnetometer is desclosed in which a gas cell containing atomic vapor is pulse pumped at one of the transitions of the gas in the cell. After the pulse has passed through the gas cell, thereby causing alignment of all the individual atomic moments along the propagation direction of the pulse, a probe beam reads out the Larmor precession frequency of the freely precessing atoms in terms of the frequency of the amplitude modulation of the probe beam caused by the free precession within the gas cell. The system is suitable for laboratory measurements of the absolute value of a magnetic field and for packaging in an expendable battery powered water-born buoy becuase of the low power consumption of the subject system.