Flexible depth-of-field imaging system using a spatial light modulator
Applied Optics, Vol. 46, Issue 36, pp. 8591-8599 (2007)
http://dx.doi.org/10.1364/AO.46.008591
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Abstract
A major problem of optical microscopes is their small depth-of-field (DOF), which hinders automation of micro object manipulation using visual feedback. Wavefront coding, a well-known method for extending DOF, is not suitable for direct application to micro object manipulation systems based on visual feedback owing to its expensive computational cost and due to a trade-off between the DOF and the image resolution properties. To solve such inherent problems, a flexible DOF imaging system using a spatial light modulator in the pupil plane is proposed. Especially, the trade-off relationship is quantitatively analyzed by experiments. Experimental results show that, for low criterion resolution, the DOF increases as the strength of the mask increases, while such a trend was not found for high criterion resolution. With high criterion resolution, the DOF decreases as the mask strength increases when high-resolution images are required. The results obtained can be used effectively to find the optimum mask strength given the desired image resolution.
© 2007 Optical Society of America
OCIS Codes
(100.1830) Image processing : Deconvolution
(100.5090) Image processing : Phase-only filters
(110.1220) Imaging systems : Apertures
(150.0150) Machine vision : Machine vision
(220.2560) Optical design and fabrication : Propagating methods
(230.3720) Optical devices : Liquid-crystal devices
ToC Category:
Image Processing
History
Original Manuscript: May 14, 2007
Revised Manuscript: September 24, 2007
Manuscript Accepted: October 5, 2007
Published: December 14, 2007
Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics
Citation
Deokhwa Hong, Kangmin Park, Hyungsuck Cho, and Minyoung Kim, "Flexible depth-of-field imaging system using a spatial light modulator," Appl. Opt. 46, 8591-8599 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-46-36-8591
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