Automated calibration of an optomechanical derotator using 6-axes parallel kinematics and industrial image processing algorithms

Benjamin Rohloff; Christian Pape; Eduard Reithmeier

doi:10.1117/1.OE.53.10.104101

6 October 2014 Automated calibration of an optomechanical derotator using 6-axes parallel kinematics and industrial image processing algorithms

Benjamin Rohloff, Christian Pape, Eduard Reithmeier

Author Affiliations +

Optical Engineering, Vol. 53, Issue 10, 104101 (October 2014). https://doi.org/10.1117/1.OE.53.10.104101

Abstract

A concept for an optomechanical derotator is presented. The derotator allows optical measurements of rotating objects during operation. To guarantee a stationary optical image, the optical axis of the derotator needs to be coaxially aligned to the rotational axis of the measured object. The correlation between the movement of the optical image and a miscalibration is explained by a mathematical model. The movement of the optical image is tracked with a high-speed camera. Approximating the tracked path as a Limacon of Pascal, a parameter corresponding to the magnitude of the miscalibration is identified. This parameter is minimized by modifying the position and the orientation of the derotator with a hexapod. The limitations of this procedure are analyzed and further approaches are discussed.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

Citation Download Citation

Benjamin Rohloff, Christian Pape, and Eduard Reithmeier "Automated calibration of an optomechanical derotator using 6-axes parallel kinematics and industrial image processing algorithms," Optical Engineering 53(10), 104101 (6 October 2014). https://doi.org/10.1117/1.OE.53.10.104101

Published: 6 October 2014

ACCESS THE FULL ARTICLE

JOURNAL ARTICLE
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY