Novel composite coded pattern for small angle measurement using imaging method

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 (±4.13ο with accuracy of the order of 1 arcsec).


Presented at:
Novel Optical Systems Design and Optimization IX, San Diego, CA, USA, 2006
Year:
2006
Publisher:
SPIE
Laboratories:




 Record created 2008-11-25, last modified 2018-03-17

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