Details
| Original language | English |
|---|---|
| Article number | 104101 |
| Number of pages | 7 |
| Journal | Optical Engineering |
| Volume | 53 |
| Issue number | 10 |
| Publication status | Published - 6 Oct 2014 |
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.
Keywords
- calibration, derotator, optical measurement systems, rotating objects
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- General Engineering
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In: Optical Engineering, Vol. 53, No. 10, 104101, 06.10.2014.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Automated calibration of an optomechanical derotator using 6-axes parallel kinematics and industrial image processing algorithms
AU - Rohloff, Benjamin
AU - Pape, Christian
AU - Reithmeier, Eduard
PY - 2014/10/6
Y1 - 2014/10/6
N2 - 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.
AB - 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.
KW - calibration
KW - derotator
KW - optical measurement systems
KW - rotating objects
UR - http://www.scopus.com/inward/record.url?scp=84911490375&partnerID=8YFLogxK
U2 - 10.1117/1.OE.53.10.104101
DO - 10.1117/1.OE.53.10.104101
M3 - Article
AN - SCOPUS:84911490375
VL - 53
JO - Optical Engineering
JF - Optical Engineering
SN - 0091-3286
IS - 10
M1 - 104101
ER -