Light sighting device for marking guide path of instrument, esp. diagnostic or therapeutic needle

摘要

The light sighting device has at least two sources (3,4) of electromagnetic radiation which emit crossing beams (7,8), whereby the crossing region of the beams marks the guide path (9). The sources essentially emit beams in individual planes whose crossing line marks the guide path. The crossing angle of the beams is between 60 and 120 degrees, pref. about 90 degrees. The electromagnetic radiation used can be light, with the sources radiating at different wavelengths. One source can emit red light and the other green light. Diode laser light sources can be used with cylindrical lenses for spreading the light into planes.