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Focus depth characteristics of lenses with long focal depth designed by a focal depth function

โœ Scribed by Jie Lin; Jian Liu; Jiubin Tan


Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
602 KB
Volume
283
Category
Article
ISSN
0030-4018

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Formation of sub-half-wavelength focal s
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We theoretically demonstrate the creation of sub-wavelength focal spot with ultra long depth of focus (DOF) non-diffracting. To achieve a sub-half-wavelength focal spot (0.4ฮป) with modulation, extended DOF (over 9.5ฮป) in vacuum, an integration of amplitude phase encoding, cylindrical polarization an