| 摘要 |
<p>An integrated night vision device and laser range finder (10) provides night-time imaging of a scene by use of an image intensifier tube (14), provides laser range finding. In a laser range finder mode the device (10) projects a pulse of laser light into a scene, and a power supply and laser range finder circuit (50) temporarily utilizes the image intensifier tube (14) as a sensor to detect reflected laser light. A detection circuit (86, 86') receives the electrical output signal from the image intensifier tube (14), and includes a magnetic circuit. Oscillation in the magnetic circuit is effected by the electrical output signal of the image intensifier tube (14). A frequency comparator circuit provides an electrical timer-stop output signal in response to a change in a frequency or phase relationship of oscillations in the magnetic circuit.</p> |
