Experiments
- AG - astrophysics and geophysics
- BK - biophysics and complex systems
- FM - solid state physics and physics of materials
- KT - nuclear physics and particle physics
BK - biophysics and complex systems
- AG.RBK - Rayleigh-Bénard Convection
- BK.ABB - Analysis of Brownian Motion
- BK.CMF - Computational Microfluidics (Digital Lab)
- BK.MDS - Molecular Dynamics Simulations of Proteins
- BK.MIF - Microfluidics
- BK.NLF - Nd:YAG Laser and Second-harmonic generation
- BK.NSE - Nanostructuring by means of Electron Beam Lithography
- BK.OTM - Assembling an optical tweezers microscope
- BK.PKR - Phase Contrast Radiography
- BK.SLM - X-ray reflectivity study of lipid membranes
- BK.STM - STED Microscopy
- BK.TRS - Total Reflection of X-rays and X-ray Reflectivity of Thin Films
- BK.WFS - Wavefront sensor for laser beam and optics characterization
BK.WFS - Wavefront sensor for laser beam and optics characterization
The so-called Talbot-Lau effect is used in many applications such as phase contrast imaging and wavefront measurements. Apart from that, wavefronts can also be measured with a Hartmann-Shack sensor following a very similar principle: In both cases the point distribution shifts when the direction of the incident light changes. For example, the Hartmann-Shack sensor has been used since 1994 to accurately measure aberrations of the human eye.
In order to compare both methods in this experiment, focal lengths (or dioptric refraction values) as well as imaging errors of various test optics (lenses, eyeglasses, ...) are determined from wavefronts recorded by means of the Talbot-Lau effect and Hartmann-Shack sensor. In addition, characteristic properties of a laser beam can be determined.