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Autofocusing based on wavelength dependence of diffraction in two-wavelength digital holographic microscopy

Autor(en)
Peng Gao, B Yao, Romano Rupp, Junwei Min, Rongli Guo, Baiheng Ma, Juanjuan Zheng, Ming Lei, Shaohui Yan, Dan Dan, Tong Ye
Abstrakt

An autofocusing method for two-wavelength digital holographic microscopy (TWDHM) based on the wavelength dependence of the diffraction process is proposed. Red and green lights are employed for the illumination of the TWDHM, and the generated holograms are recorded simultaneously by a color CCD camera. Due to the wavelength dependency of the diffraction process, the farther the reconstruction plane is from the image plane, the larger the difference is between the red and green light distributions. Thus, the image plane can be determined by finding the minimum of the variation between the red and green lights on their amplitude distributions. The feasibility of the proposed method is demonstrated by simulation and experiment.

Organisation(en)
Physik Funktioneller Materialien
Externe Organisation(en)
Chinese Academy of Sciences (CAS)
Journal
Optics Letters
Band
37
Seiten
1172-1174
Anzahl der Seiten
3
ISSN
0146-9592
DOI
https://doi.org/10.1364/OL.37.001172
Publikationsdatum
2012
Peer-reviewed
Ja
ÖFOS 2012
103021 Optik, 103018 Materialphysik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/834a2af0-b51e-4288-85a6-a89c844343c7