Improved 3D imaging of phase shifting digital holographic microscope by compensation for wavefront distortion
Cazac, V. (2021)
Cazac, V.
Institute of Physics Publishing
2021
The VI International Conference on Information Technology and Nanotechnology (ITNT-2020)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202108266809
https://urn.fi/URN:NBN:fi:tuni-202108266809
Kuvaus
Peer reviewed
Tiivistelmä
This paper is focused on improving the performance of quantitative phase imaging via phase-shifting digital holographic microscope. The development of the interferometric techniques is important for technology and biomedicine, since the surface and structure of samples can be monitored in real-time by non-destructive investigations. The novelty of the optical arrangement is that in the reference beam of the digital holographic microscope a liquid crystal variable retarder is introduced. Thus, it became possible to actively control the polarization state of light for realizing the necessary phase-shifts. In addition, a spatial light modulator is integrated in the optical setup to produce computer-controlled compensation of the spatial distortion. An ad hoc hologram processing technique was developed to execute the numerical correction of the physical phase-shifting errors. Topographical investigations of phase masks recorded on carbazol-based azopolymers provided the experimental testing of the achieved accuracy in phase reconstruction.
Kokoelmat
- TUNICRIS-julkaisut [16929]