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Multispectral imaging axicons |
Applied Optics, Vol. 50, Issue 20, pp. 3638-3645 (2011)
http://dx.doi.org/10.1364/AO.50.003638
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Abstract
Large-aperture linear diffractive axicons are optical devices providing achromatic nondiffracting beams with an extended depth of focus when illuminated by white light sources. Annular apertures introduce chromatic foci separation, making chromatic imaging possible despite important radiometric losses. Recently, a new type of diffractive axicon has been introduced, by multiplexing concentric annular axicons with appropriate sizes and periods, called a multiple annular linear diffractive axicon (MALDA). This new family of conical optics combines multiple annular axicons in different ways to optimize color foci recombination, separation, or interleaving. We present different types of MALDA, give an experimental illustration of the use of these devices, and describe the manufacturing issues related to their fabrication to provide color imaging systems with long focal depths and good diffraction efficiency. Application to multispectral image analysis is discussed.
© 2011 Optical Society of America
OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1380) Diffraction and gratings : Binary optics
(050.1950) Diffraction and gratings : Diffraction gratings
(110.6760) Imaging systems : Talbot and self-imaging effects
ToC Category:
Diffraction and Gratings
History
Original Manuscript: March 16, 2011
Revised Manuscript: May 19, 2011
Manuscript Accepted: May 23, 2011
Published: July 8, 2011
Citation
Emilie Bialic and Jean-Louis de Bougrenet de la Tocnaye, "Multispectral imaging axicons," Appl. Opt. 50, 3638-3645 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-20-3638
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