Abstract

A gravity referenced optical inclinometer which uses a transparent fluid as angle-sensor element is described. Its principle of operation is based on light refraction at a free surface of the fluid. Measurements were carried out in an optical inclinometer built by the authors, and a resolution of 0.007° was obtained. The inclinometer permits real-time angle determinations along two perpendicular axis.

© 1996 Optical Society of America

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