Depth-of-Field Extension Method Using Variable Annular Pupil Division

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The depth-of-field (DOF) of an imaging system is closely related to the pupil function that describes the characteristics of the pupil such as size and shape. Shallow DOF is especially problematic in microscopic optical imaging systems because they have relatively large aperture size for high optical resolution. In this paper, a new DOF extension method is proposed. This is to acquire an image by integrating the incoming light while changing the size of annular pupil. By dividing the pupil into annular form, the effect of the defocus aberration is reduced. Theoretical background is explained and simulation and experimental results are shown for verification. The results show that the DOF can effectively be extended by this method.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-04
Language
English
Article Type
Article
Keywords

HIGH FOCAL DEPTH; IMAGING-SYSTEMS; PHOTOGRAPHY

Citation

IEEE-ASME TRANSACTIONS ON MECHATRONICS, v.17, no.2, pp.390 - 396

ISSN
1083-4435
DOI
10.1109/TMECH.2011.2106508
URI
http://hdl.handle.net/10203/97975
Appears in Collection
ME-Journal Papers(저널논문)
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