| 摘要 |
<p>A portable laser pulse detection device (10). Optical pulses are sensed by a photodiode (21), and if the pulse width is narrow enough to yield sufficient spectral energy within the bandpass of the tuned circuits, a 'laser occurred' indication will be produced by the processing circuitry. Automatic adjustment of the detected output for non-laser incident radiation is made by varying the signal level into a sequential detection logarithmic amplifier (27) by a voltage proportional to the integral of the incident radiation over a short period of time. The device (10) is shielded against electromagnetic interference and adapts automatically to variations in background noise.</p> |
