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AssigneeCincinnati Microwave, Inc.
InventorsLawrence G. Decker, Janet R. Poston, Edward F. Hume
Estimating the term…
A photodetector receives an optical signal and converts it an electrical signal. A pulse stretcher converts the electrical signal into a first signal which is characterized by having an increased pulse width relative to the electrical signal. A noise averager converts the electrical signal into a second signal which is representative of the average noise component of the electrical signal. A threshold reference is generated as a linear function of the potential difference between the first signal and the second signal. A first comparator compares the magnitude of the first signal and the threshold reference signal and generates a first logic output which is true if the magnitude of the first signal is greater than the magnitude of the threshold reference signal. A second comparator compares the magnitude of electrical signal and the threshold reference signal and generates a second logic output which is true if the pulse width of the electrical signal measured as a funtion of time is greater than the response time of the second comparator. A logic circuit generates an alert indication if the first logic output is true and the second logic output is false.
In a laser detection system of the type having a photodetector and a decision network, wherein the photodetector receives an optical signal and converts it to an electrical signal and the decision network receives the electrical signal and evaluates it to determine whether it represents a valid laser signal, said decision network comprising:
Dependencies are inferred from the claim text.