Non-contact measuring device

Details Non-contact measuring device Non-contact measuring device

1991-07-19

1992-12-29

Evans, F. L.

Optics: measuring and testing

By configuration comparison

With photosensitive film or plate

356386, 250560, G01B 1108

Patent

active

051755955

ABSTRACT:
A non-contact measuring device which applies a scanning light moving parallel at a constant speed to an object to be measured and measures the shape of the object to be measured in accordance with the time for which the scanning light is shut off by the object to measured. To provide the scanning light, light generated from a source of light is allowed to enter through a lens a polygonal mirror rotating at a constant speed and the light reflected by the polygonal mirror is allowed to enter a collimator lens. And, it is necessary that the scanning light be focused at the position of the object to be measured. In the non-contact measuring device, a distance between the light source and lens can be adjusted by adjust means according to the position of the object to be measured and the light allowed to enter the collimator lens can be diverged or converged, so that the light can always be focused at the position of the object to be measured.

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