초록 ▼

A laser range finder receiver for detecting a return pulse and providing an output signal indicative thereof and a single-chip microcontroller for controlling receiver operation and, in particular, for automatically recalibrating the receiver. The receiver is responsive to up and down current contro

A laser range finder receiver for detecting a return pulse and providing an output signal indicative thereof and a single-chip microcontroller for controlling receiver operation and, in particular, for automatically recalibrating the receiver. The receiver is responsive to up and down current control signals from the microcontroller to adjust the bias of an APD photodetector. An offset voltage and receiver false alarm rate are monitored with no light on the photodetector while a calibration voltage is adjusted to recalibrate the receiver. The microcontroller further monitors photodetector temperature via a temperature sensor, and can perform APD bias adjustment and receiver recalibration in response to temperature changes, providing operation over a wide temperature range.

대표청구항 ▼

A laser range finder comprising: receiver means including a detector means for generating a detected signal; a means for summing said detected signal with a calibration signal and producing a first output signal; a means for generating an offset voltage signal from said first output signal; a thresh

A laser range finder comprising: receiver means including a detector means for generating a detected signal; a means for summing said detected signal with a calibration signal and producing a first output signal; a means for generating an offset voltage signal from said first output signal; a threshold detection means for providing a second output signal indicative of a target return; and a means monitoring said second output signal for supplying a third output signal from which false alarms can be detected; and programmed processor means supplied with said offset voltage and said third output signal for generating said calibration signal and for adjusting the value of said calibration signal utilizing said offset voltage and said third output signal until a selected false alarm rate is achieved.