Calibration of a Shack-Hartmann sensor for absolute measurements of wavefronts
We demonstrate a method with which to calibrate a Shack-Hartmann sensor for absolute wavefront measurement of collimated laser beams. Nearly perfect spherical wavefronts originating from a single-mode fiber were used as references. After the calibration, the uncertainty of the wavefront was less tha...
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Veröffentlicht in: | Applied Optics 2005-10, Vol.44 (30), p.6419-6425 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We demonstrate a method with which to calibrate a Shack-Hartmann sensor for absolute wavefront measurement of collimated laser beams. Nearly perfect spherical wavefronts originating from a single-mode fiber were used as references. After the calibration, the uncertainty of the wavefront was less than lambda/100 peak to valley across a diameter of 6 mm. For example, this method allowed us to balance aberrations and prepare collimated beams with wavefronts that are plane to lambda/500 across 1 mm. |
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ISSN: | 1559-128X 0003-6935 1539-4522 |
DOI: | 10.1364/ao.44.006419 |