Novel composite coded pattern for small angle measurement using imaging method

Suguna Sree Nukala; Sai Siva Gorthi; Kameswara Rao Lolla

doi:10.1117/12.678792

5 September 2006 Novel composite coded pattern for small angle measurement using imaging method

Suguna Sree Nukala, Sai Siva Gorthi, Kameswara Rao Lolla

Proceedings Volume 6289, Novel Optical Systems Design and Optimization IX; 62891D (2006) https://doi.org/10.1117/12.678792
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

A novel approach for measurement of small rotation angles using imaging method is proposed and demonstrated. A plane mirror placed on a precision rotating table is used for imaging the newly designed composite coded pattern. The imaged patterns are captured with the help of a CCD camera. The angular rotation of the plane mirror is determined from a pair of the images of the pattern, captured once before and once after affecting the tilt of the mirror. Both simulation and experimental results suggest that the proposed approach not only retains the advantages of the original imaging method but also contributes significantly to the enhancement of its measuring range (±4.13° with accuracy of the order of 1 arcsec).

Citation Download Citation

Suguna Sree Nukala, Sai Siva Gorthi, and Kameswara Rao Lolla "Novel composite coded pattern for small angle measurement using imaging method", Proc. SPIE 6289, Novel Optical Systems Design and Optimization IX, 62891D (5 September 2006); https://doi.org/10.1117/12.678792

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