Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1975-05-19
1976-09-21
Corbin, John K.
Optics: measuring and testing
Range or remote distance finding
With photodetection
324140D, 328161, 356 93, G01J 342
Patent
active
039815862
ABSTRACT:
An analytically significant ratio between timevarying magnitudes of signals is periodically monitored in recurring cycles which are each synchronized with a frequency generator. During every monitoring cycle, each signal relating to the numerator and denominator of the ratio, is integrated separately for a fixed number of generator cycles. Thereafter in each monitoring cycle, the output from the integrator of the denominator signal is applied at the input to the integrator of the numerator signal and the time taken by the latter to integrate back to its starting level is measured in proportion to the ratio of the signals. Either digital or analog time measurements may be utilized and the number of generator cycles over which the ratio is determined may include transition periods between each stage of integration.
REFERENCES:
patent: 3467865 (1969-09-01), Scott et al.
patent: 3875519 (1975-04-01), Warren
Corbin John K.
Evans F. L.
Giarratana S. A.
Masselle F. L.
O'Meara J. M.
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