Wavefront measurement using electro-optic scanning with a liquid-crystal SLM

Summary form only given. The developed wavefront sensor is based on the original Hartmann principle in which the aperture can be moved across the wavefront to analyze by an electro-optic programmable device. According to the operation principle the position of the diffraction pattern is measured on a CCD detector array at a distance d behind a lens of focal length f. If (x´,y´) is the measured position of the beam transmitted by the aperture moving on the SLM, the local wavefront slope at position (x,y) can be derived. This data is stored in a memory for each position of the sampling aperture displayed on the spatial light modulator (SLM) and which sequentially scans the wavefront.