Super-oscillatory lens device
Super-oscillatory lens device
A super-oscillatory lens (10) having a pre-defined pattern to spatially modulate the light beam in amplitude and/or phase which has a blocking element (6) formed integrally with the lens, or as a separate component adjacent to the lens, which is opaque to the light beam to cause diffraction of the light beam around the blocking element and formation of a shadow region (20). The lens and blocking element focus the light beam to form an elongate needle-shaped focus (15) in the shadow region (20). In any application in which it is necessary to scan a small spot over a surface, compared with a conventional objective lens focus the elongate shape of the focus relaxes the requirement on a feedback loop to maintain a constant separation between a scan head and a surface being scanned. The elongate shape is also ideal shape for materials processing applications.
WO2013114075 A1
8 August 2013
Zheludev, Nikolai
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Savo, Salvatore
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Roy, Tapashree
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Savinov, Vassili
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Dennis, Mark
aeb7123e-786d-4ae2-bc21-72eddd61697b
Rogers, Edward
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Lindberg, Jar
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Zheludev, Nikolai, Savo, Salvatore, Roy, Tapashree, Savinov, Vassili, Dennis, Mark, Rogers, Edward and Lindberg, Jar
(Inventors)
(2013)
Super-oscillatory lens device.
WO2013114075 A1.
Abstract
A super-oscillatory lens (10) having a pre-defined pattern to spatially modulate the light beam in amplitude and/or phase which has a blocking element (6) formed integrally with the lens, or as a separate component adjacent to the lens, which is opaque to the light beam to cause diffraction of the light beam around the blocking element and formation of a shadow region (20). The lens and blocking element focus the light beam to form an elongate needle-shaped focus (15) in the shadow region (20). In any application in which it is necessary to scan a small spot over a surface, compared with a conventional objective lens focus the elongate shape of the focus relaxes the requirement on a feedback loop to maintain a constant separation between a scan head and a surface being scanned. The elongate shape is also ideal shape for materials processing applications.
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More information
Submitted date: 3 February 2012
Published date: 8 August 2013
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 393146
URI: http://eprints.soton.ac.uk/id/eprint/393146
PURE UUID: 063e1e98-93a1-469e-b7dd-1773c6e7c1de
Catalogue record
Date deposited: 13 May 2016 13:58
Last modified: 07 Feb 2023 02:52
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Contributors
Inventor:
Nikolai Zheludev
Inventor:
Salvatore Savo
Inventor:
Tapashree Roy
Inventor:
Vassili Savinov
Inventor:
Mark Dennis
Inventor:
Edward Rogers
Inventor:
Jar Lindberg
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