THERMAL IMAGING DEVICE HAVING NON-ORTHOGONAL SCAN POSITION SENSOR TO SCANNING MIRROR BEAM PATH ANGLE

摘要

The method and the associated device for harmonising the optical/optoelectronic axes (4; 5; 18) of a sighting unit, consisting of a day viewing channel (3) and a combined thermal image/laser receiving channel (1) having an offset laser transmitter (2), on a common reference axis forms the subject matter of the invention. The laser radiation (9) reflected from the target impinges together with the radiation (11) from the target and the natural radiation (11) of the environment via the scanning mirror (12) on selected elements of the detector series arrangement (13), is optoelectronically converted and represented on the light-emitting diode arrangement (25). Via the rear of the mirror, the signals are projected on to the retina with the aid of the deflecting mirror (23) folded into the beam path. The visible radiation (19) imaged in the plane of the day collimating mark (21) likewise reaches the observer's eye when the deflecting mirror is folded out. The visible radiation (19) in the day viewing channel (3) can be observed when the deflecting mirror is folded out, by means of imaging in the plane of the day collimating mark (21). When observing the radiation on the side of the thermal channel output, the day collimating mark is replaced by the thermal image collimating mark (29) which, being reflected into the thermal image reproduction channel, is superimposed on the thermal image. In the harmonised state, it is displaced to the position of the day collimating mark. IMAGE