| Definition of 'reading telescope' |
The Standard Electrical Dictionary |
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1. reading telescope
A telescope for reading the deflections of a reflecting galvanometer.
A long horizontal scale is mounted at a distance from the galvanometer and directly below or above the centre of the scale a telescope is mounted. The telescope is so directed that the mirror of the galvanometer is in its field of view, and the relative positions of mirror, scale and telescope are such that the image of the scale in the galvanometer mirror is seen by the observer looking through the telescope.
Under these conditions it is obvious that the graduation of the scale reflected by the mirror corresponds to the deflection of the galvanometer needle.
The scale may be straight or curved, with the galvanometer in the latter case, at its centre of curvature.
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Definitions of reading telescope
