Title
Depth-of-focus reduction for digital in-line holography of particle fields
Document Type
Article
Publication Date
6-1-2005
Abstract
Poor axial precision caused, in part, by large depth of focus (ꞇ) has been a vexing problem in extraction of particle position from digital in-line holograms. A simple method is proposed to combat this depth-of-focus difficulty. The method is based on decoupling of size and position information. With d , ∆, and λ being particle diameter, CCD pixel size, and the wavelength, respectively, our main theoretical result is the reduction of ꞇ from ꞇ ~ d2 / λ to ꞇ ~ ∆2 / λ for particles of known size. This result is confirmed in laboratory experiments with holograms of calibrated glass spheres.
Publication Title
Optics Letters
Recommended Citation
Yang, W.,
Kostinski, A. B.,
&
Shaw, R.
(2005).
Depth-of-focus reduction for digital in-line holography of particle fields.
Optics Letters,
30(11), 1303-1305.
http://doi.org/10.1364/OL.30.001303
Retrieved from: https://digitalcommons.mtu.edu/physics-fp/226
Publisher's Statement
© 2005 Optical Society of America. Publisher’s version of record: https://doi.org/10.1364/OL.30.001303