B8.2 - Wavefront sensing by numerical evaluation of diffracted wavefields
- Event
- AMA Conferences 2017
2017-05-30 - 2017-06-01
Nürnberg, Germany - Band
- Proceedings Sensor 2017
- Chapter
- B8 - Optical Measurement Systems II
- Author(s)
- M. Bichra, T. Meinecke, S. Sinzinger - Technische Universität Ilmenau (Germany)
- Pages
- 290 - 293
- DOI
- 10.5162/sensor2017/B8.2
- ISBN
- 978-3-9816876-4-4
- Price
- free
Abstract
A novel wavefront sensor principle based on decomposition of the angular spectrum propagator and Fourier analysis is presented. A wavefront is propagated to a 2 dimensional binary cross grating. The appropriate diffraction orders are filtered out and captured by a CCD camera. The following Fourier analysis delivers maps of phase gradients in the x and y coordinates. We verify the presented method by numerical tests and experimentally in a measurement setup on the example of a wavefront
generated by a cubic phase element in transmission and reflection. We compared the results of our principle with a commercial Shack-Hartmann wavefront sensor.