13 May 2015 Automated optical system alignment and low order wavefront sensing
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Abstract
An automated alignment optical system will greatly simplify alignment tasks, increase the flexibility and utility of reconfigurable optical systems, and allow for the quick and efficient set up distributed optical systems. In this work, we demonstrate automated alignment of a tilted and decentered focal lens using only focal plane imaging by exploiting the aberration effects caused by the misalignment. A Gaussian beam is passed through the lens with 4 degrees of freedom and onto a science camera. The deformation of the spot image is analyzed to determine the tilt and shift misalignments on the lens. Corrections based on these measurements are applied in closed loop to align the system. We discuss various techniques for mitigating measurement errors, characterizing the system and operating the control loop and present results from the experiment.
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Joyce Fang, Dmitry Savransky, "Automated optical system alignment and low order wavefront sensing", Proc. SPIE 9481, Image Sensing Technologies: Materials, Devices, Systems, and Applications II, 94810W (13 May 2015); doi: 10.1117/12.2181823; http://dx.doi.org/10.1117/12.2181823
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KEYWORDS
Control systems

Optical alignment

Platinum

Picosecond phenomena

Wavefront sensors

Cameras

Imaging systems

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