1 December 1992 Measurement of small angular displacement by a modified moiré technique
Author Affiliations +
Small angle measurement using a modified moiré interference technique is reported. The range of angle measurement for 25-μm pitch gratings is about ± 25 μrad and the accuracy of measurement is of the order of 0.2 μrad with a time constant of 0.1 s. A piezoelectric transducer (PZT) is used for angular displacement. The angular sensitivity under the present experimental conditions is found to be of the order of 21.8 mV/μrad.
Brahm Pal Singh, Brahm Pal Singh, Kowsalya Varadan, Kowsalya Varadan, Vijay Trimbak Chitnis, Vijay Trimbak Chitnis, } "Measurement of small angular displacement by a modified moiré technique," Optical Engineering 31(12), (1 December 1992). https://doi.org/10.1117/12.60025 . Submission:

Back to Top