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MOS 8: Manufacturing of Optical Systems: Optical Microsystems
10:30 - 11:45
Session Chair: Sven Kiontke, asphericon GmbH
Location:Room 21, 2nd floor, ICM MOS
10:30 - 10:45
3D direct laser writing of micro corner cube retroreflectors
Yann Tanguy, Fabian Niesler, Michael Thiel
Nanoscribe GmbH, Germany
Micro corner cube retroreflectors were written by two-photon laser lithography, and its process optimised to obtain suitable manufacturing times, optical surfaces and shape accuracy to serve as polymer master for industrial replication.
10:45 - 11:00
Refractive Index Modulation in Media with Saturable Photosensitivity
Univ. of Central Florida, CREOL - the College of Optics
Bragg gratings are fabricated by thermal treatment of glass specimen initially exposed by spatially modulated UV dosage. Obtained refractive index modulation depends on dosage nonlinearly due to saturability of photosensitivity. An analytical expression for the efficient amplitude of Bragg modulation is derived.
11:00 - 11:15
Computer-Controlled Process of Off-Axis Asperics Production with Asphericity up to 20 mm
Aleksandr P. Semenov, Magomed A. Abdulkadyrov, Sergey P. Belousov, Aleksander N. Ignatov, Vladimir E. Patrikeev
JSC LZOS/ Russia, Russian Federation
Technology using automated system with computer control and a set of special instruments, which allows aspherization of optical elements with deviation from the nearest sphere up to 20 mm, was developed.
11:15 - 11:30
Aspherical high-speed varifocal mirror for catadioptric miniature telephoto optics
Matthias C Wapler, Florian Lemke, Gazmed Alia, Ulrike Wallrabe
University of Freiburg, Germany
We present a varifocal mirror using a glass-piezo composite membrane. Its two degrees of freedom enable dynamic aspherical correction in addition to the focal range of ±8dpt, 9mm aperture and millisecond-scale response time. We demonstrate it as a secondary mirror in a catadioptric objective with f=68mm, F=3 and 16.6mm thickness.
11:30 - 11:45
Beam shapers for fractional topological charges
Rebeca Tudor1,2, Cristian Kusko2, Mihai Kusko2, Mona Mihailescu3, Andrei Avram2
1University of Bucharest, Romania, Romania; 2National Institute for R&D in Microtechnology IMT, Bucharest, Romania; 3Politehnica University of Bucharest, Physics Department, Bucharest, Romania
We present fabrication and characterization of reflective beam shapers which generate fractional optical vortices. These diffractive optical elements are designed for visible light and introduce a π phase shift in the optical wavefront, and as consequence a non-integer topological charge. The fabricated components have potential applications in beam shaping, particle rotation, communication.