1. Large-aperture deformable mirror correction of tiled-grating wavefront error
- Author
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Leon J. Waxer, S.E. Dean, R. Jungquist, M.E. Wilson, S. Abbey, B. E. Kruschwitz, Drew N. Maywar, M. D. Moore, and Jie Qiao
- Subjects
Physics ,Wavefront ,business.industry ,Aperture ,Holography ,General Physics and Astronomy ,Fundamental frequency ,Grating ,Deformable mirror ,law.invention ,Optics ,law ,Distortion ,business ,Adaptive optics - Abstract
When tiling three gratings, with each individually exhibiting astigmatism and power due to holographic errors and coating stress, the resulting wavefront aberrations contain high-frequency components as well as the fundamental frequency, which is nearly three cycles across the aperture in the tiling direction. A deformable mirror (DM) that was designed to compensate for much slower errors (e.g., those arising from distortion in amplifier disks) is being used to compensate for this tiling-induced error. This investigation studies the effectiveness of compensating only the fundamental frequency of the tiled aberration, and shows that this provides a significant improvement that is adequate for a range of expected aberrations. Limitations of the DM correction technique are also studied.
- Published
- 2006
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