Registers – Transfer mechanism – Traveling pawl
Patent
1975-01-13
1976-07-27
Gruber, Felix D.
Registers
Transfer mechanism
Traveling pawl
328147, 3401462, 356 83, G01J 342, G01J 308
Patent
active
039719219
ABSTRACT:
An optical scanner having a narrow instantaneous field of view optically scans an entire field of view to determine if a particular source of optical radiation is in the field of view. A first detector responds to energy of a source imaged by the scanner and derives a first signal having an amplitude versus time variation that is a convolution of dispersed spectral energy from the source. A second detector, displaced by a predetermined distance from the first detector, responds to substantially only one predetermined wavelength of the energy of the imaged source. In response to the energy from the second detector being above a predetermined amplitude, a waveform recognition network responsive to the first signal is enabled. The recognition network includes a circuit for detecting the amplitude of the peak value of an initial undulation of the first signal. In response to the detected peak being above a threshold value, the amplitude of the first signal is compared at a plurality of different time intervals following the initial peak with predetermined maximum and minimum percentages of the detected peak value. In response to the first signal falling between the maximum and minimum values during at least some of the different time intervals, a signal is derived to indicate that the particular source of optical radiation has been detected.
REFERENCES:
patent: 3561872 (1971-02-01), Grabowski et al.
patent: 3820898 (1974-06-01), Olson
patent: 3868499 (1975-02-01), Aaronson et al.
Schmit David E.
Wedig, Jr. Frank L.
Cincinnati Electronics Corporation
Gruber Felix D.
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