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EOS Posters presented during lunch break at B0 Hall, ICM
ID: 154 / MOS Posters: 1 Manufacturing, Tolerancing, and Testing of Optical Systems (MOS)
A New Approach To Laser Polishing And Form Correction Of Optical Components
Harold Kessler, Roelene Botha, Carsten Ziolek
NTB Interstaatliche Hochschule für Technik Buchs, Switzerland
The increasing variety of optical components and materials, combined with stricter surface tolerance requirements, necessitate refining existing polishing processes and developing innovative new polishing solutions and metrology technologies. A fast, reproducible laser polishing process would offer considerable economic benefits over conventional mechanical polishing processes and interest a broad variety of optics manufacturers. In this work, a holistic approach is taken to address the various aspects of glass polishing and form correction via a novel laser polishing system design, the use of a measurement strategy that can be integrated inline and simulation results that are correlated with process parameter studies for different materials.
ID: 123 / MOS Posters: 2 Manufacturing, Tolerancing, and Testing of Optical Systems (MOS)
Computer Generated Holograms (CGH) for Testing, Alignment and Positioning of Astronomical and Space Mirrors Aspherical Surfaces
Aleksandr P. Semenov1, Magomed A. Abdulkadyrov1, Nikolay S. Dobrikov1, Aleksandr N. Ignatov1, Vladimir E. Patrikeev1, Vitaliy V. Pridnya1, Andrey V. Polyanchikov1, Ruslan K. Nasyrov2
1JSC Lytkarino Optical Glass Factory(LZOS), Russian Federation; 2Institute of Automation and Electrometry of the Russian Academy of Science, 1 Koptyuga ave. Novosibirsk, 630090, Russia
JSC LZOS successfully applies Computer Generated Holograms (CGH) for testing of on- and off-axis surfaces of large-dimensioned optical components for their alignment with respect to interferometer, for defining of aspherical surface optical vertex position with respect to the geometrical center and for optical systems
alignment. All this allows producing of large-dimensioned aspherical on- and off-axis astronomical and space mirrors with high accuracy.
ID: 122 / MOS Posters: 3 Manufacturing, Tolerancing, and Testing of Optical Systems (MOS)
New Technical Solutions in the Production Method of High-Aperture Ruled Diffraction Gratings
Andrei Nikolaevich Melnikov, Anatoly Vasilevich Lukin
JSC “Scientific and Production Association “State Institute of Applied Optics”, Russian Federation
This paper presents a new approach in the production method of high-aperture diffraction gratings with high diffraction efficiency on convex and concave working surfaces with large deflection based on the use of an original pendulum-type ruling engine.
ID: 133 / MOS Posters: 4 Manufacturing, Tolerancing, and Testing of Optical Systems (MOS)
Fabrication of SiC Off-axis Aspheric Mirror by Using Robot Polishing
Haitao Liu, Fengtao Yan, Wenchuan Zhao, Jieli Wu, Min Zhou
Institute of Optics and Electronics, Chinese Academy of Sciences, 610209 Chengdu, China
Two silicon carbide (SiC) lightweight off-axis aspheric mirrors were fabricated by using robot polishing technology. One is a primary mirror with dimension 380mm×328mm, the other is a tertiary mirror with dimension 294mm×238mm. The robot polishing technology is the combination of CCOS technology and a 6-axises industrial robot. The setup of robot polishing system is discussed, and the mirror aspheric grinding, surface polishing and figuring process are reported in this paper. The final surface shape error of primary mirror is 11.4nm RMS, and the tertiary is 12.1nm RMS. The capability of off-axis aspheric mirror fabricating on robot polishing system is verified.
ID: 142 / MOS Posters: 5 Manufacturing, Tolerancing, and Testing of Optical Systems (MOS)
Fast Fabrication of 1.26-Meter-Long Optic for Elliptic Cylindrical Focusing Bending Mirror
Jieli Wu, Haitao Liu, Fengtao Yan, Min Zhou, Bin Zhuo, Yongjian Wan
Institute of Optics and Electronics, Chinese Academy of Sciences, China, People's Republic of
As beamline emittance reaching the diffraction limit, the demand for focusing mirrors over one meter in length is ever increasing. Bending mirrors, are competitive for its adjustable radius and high manufacture precision, whose final surface form is managed by a delicate bending of a high precision plane. A special contour plays an essential role and benefits this final touch, given that the computed torque along the length closely correlates with the corresponding width of the optics. However, it poses main challenges with severe edge effect, deformation and metrology to the fabrication of the precursor plane mirror. This paper reports on a fast processing technology for a 1.26-meter-long plane as a bending mirror with irregular shape. A smooth surface with a slope error of 0.67 urad(RMS) and 0.3nm roughness is achieved through deterministic flexible finishing of robot polishing system and annular polishing, providing a high precision and cost-effective method to meet the growing needs for long X-ray mirrors.