One focus is in the area of mold testing optical surfaces, especially of aspheres. Computer-Generated Holograms (CGH) can be used for this purpose which are designed and fabricated at ITO. In addition, flexible measurement methods are examined, that are able to supplement or replace the static null test. In addition to CGHs for interferometry we develop and fabricate diffractive elements and micro-optics for other Applications, such as UV measurement systems, beam shaping tasks and wavefront sensors.
Infrastructure of the group
Projects
Publications
2025
- J. Rühle et al., “Polarization Camera based Fringe Locking Control of a Writing Head for Scanning Beam Interference Lithography,” in 2025 American Control Conference (ACC), Jul. 2025, pp. 3254–3259. doi: 10.23919/ACC63710.2025.11107550.
- C. Pruss et al., “Absolute position information to reduce uncertainty in flexible asphere and freeform metrology,” in Twelfth European Seminar on Precision Optics Manufacturing, G. Fütterer, C. Wünsche, O. W. Fähnle, H. Thieß, and A. Haberl, Eds., SPIE, 2025, p. 1378909. doi: 10.1117/12.3076101.
- W. Osten et al., “The reconstruction, testing, and improvement of a historical giant astronomical telescope,” in Ultra-High-Definition Imaging Systems VIII, S. Miyata, T. Yatagai, and Y. Koike, Eds., SPIE, 2025, p. 1338902. doi: 10.1117/12.3040884.
- I. Ortlepp et al., “Enhanced Vectorial Measurement Uncertainty Model,” Metrology, vol. 5, Art. no. 2, Apr. 2025, doi: 10.3390/metrology5020019.
- D. Didychenko et al., “Analysis of laser-induced damage threshold of circular grating waveguide structures exposed to sub-picosecond laser radiation centered at a wavelength of 1030 nm,” Applied Physics B, vol. 131, Art. no. 3, Feb. 2025, doi: 10.1007/s00340-025-08414-1.
Group leader
Christof Pruß
Dr.-Ing. Dipl.-Phys.Group leader Interferometry and Diffractive Optics