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