| 摘要 |
<p>In an optoelectric distance measuring apparatus, short light pulses emitted by a laser diode are directed by a measuring probe (2) to a target object (9). The light signals reflected are collected by the measuring probe (2) and supplied to a photodiode which directs the electric pulse signals formed towards a control and evaluation unit. In order to perform an accurate measurement even in a neighbouring area, the measuring probe (2) is provided with a double face mirror (23) extending along the optical axis of the lens (22) up to the ends of the emitting light guide (8) and the receiving light guide (10) which are situated approximately in the focus area. There is preferably provided a total reflection mirror having the shape of two glass prisms separated by an air gap. The measuring probe (2) is a separate structural part and may be connected by a flexible light guide cable to a base apparatus incorporating the structural part for the production of light pulses, the transformation of received light signals into electric pulse signals, as well as for the processing and evaluation of electric pulse signals.</p> |
