Camera System and Method for Observing Objects at Great Distances, in Particular for Monitoring Target Objects at Night, in Mist, Dust or Rain
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Abstract
A camera system and a method for the observation of objects at a large distance at night or through mist, dust, or rain, at an observation distance of 30 to 40 km, includes a pivotable target tracking mirror, a concave primary mirror with a long range, and a convex secondary mirror, which together form a reflecting telescope. The camera system also includes a Barlow lens system, an IR-sensitive image sensor arranged in the image plane of the reflecting telescope, a controllable high-speed shutter system for the image sensor, controllable IR illuminator to illuminate the object being observed by IR illumination pulses of multiple different colors, and a control device that coordinates control of the IR illuminator and of the high-speed shutter system in order to detect multispectral images captured by means of the image sensor according to a gated viewing technique.
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Citations
25 Claims
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1-10. -10. (canceled)
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11. A camera system for the observation of objects at a distance of more than 5 km, at night or in mist, dust, or rain, comprising:
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a reflecting telescope formed by a concave primary mirror having a focal distance of more than 1 m, and a convex secondary mirror; an infrared-(IR) sensitive electronic image sensor arranged in an image plane of the reflecting telescope; a controllable high-speed shutter system for the IR-sensitive electronic image sensor; a controllable IR illumination device configured to illuminate the object being observed, wherein the controllable IR illumination device is configured to emit narrow-band IR illumination pulses in multiple different colors; and a control device configured to coordinate control of the IR illumination device and of the high-speed shutter system using a gated viewing technique to detect multispectral images recorded by means of the IR-sensitive electronic image sensor. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for the observation of objects at a distance of more than 5 km, at night or in mist, dust, or rain, by means of a camera system, the method comprising:
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illuminating an object being observed using an IR illumination device using narrow-band IR illumination pulses of multiple different colors; controlling the IR illumination device and a high-speed shutter system using a gated viewing technique to detect multispectral images recorded by means of an IR-sensitive electronic image sensor, wherein the IR-sensitive electronic image sensor is arranged in a plane of a reflecting telescope that includes a concave primary mirror having a focal distance of more than 1 m, and a convex secondary mirror. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification