Paper 13100-82
Antireflection coating on large lenses for G-CLEF blue camera
19 June 2024 • 16:30 - 16:45 Japan Standard Time | Room G214, North - 2F
Abstract
The GMT-Consortium Large Earth Finder (G-CLEF) is a spectrograph, to be delivered as the first light scientific instrument for the Giant Magellan Telescope (GMT), and divided into a red and a blue channel.
In the frame of this project, Bertin Winlight is in charge of the manufacturing of the blue camera lenses, and entrusted CILAS to develop and realize the antireflection coatings on the 8 different lenses of this camera. The camera consist of 8 lenses with diameter in the 190 – 323 mm range made of CaF2 and other optical glass (BAL35Y, PBM18Y, BSM51Y). We present the results on the design, development and manufacturing of antireflection coating with PIAD (Plasma-Ion Assisted Deposition) technology, which is well adapted to produce very dense layers and high quality coatings for severe environments.
The design of antireflection coating, in the spectral range 350-541nm, has taken into account large diameter and high curvature of the lenses and has been experimentally validated on a dummy shape. Moreover a dedicated coating process has been implemented and qualified on CaF2 substrates, leading to the successful coating of the 8 different lenses.
In the frame of this project, Bertin Winlight is in charge of the manufacturing of the blue camera lenses, and entrusted CILAS to develop and realize the antireflection coatings on the 8 different lenses of this camera. The camera consist of 8 lenses with diameter in the 190 – 323 mm range made of CaF2 and other optical glass (BAL35Y, PBM18Y, BSM51Y). We present the results on the design, development and manufacturing of antireflection coating with PIAD (Plasma-Ion Assisted Deposition) technology, which is well adapted to produce very dense layers and high quality coatings for severe environments.
The design of antireflection coating, in the spectral range 350-541nm, has taken into account large diameter and high curvature of the lenses and has been experimentally validated on a dummy shape. Moreover a dedicated coating process has been implemented and qualified on CaF2 substrates, leading to the successful coating of the 8 different lenses.
Presenter
CILAS (France)
Hélène Krol got a Master in Engineering in Optics from Institut d’Optique Graduate School in 2002.
Then she got her Ph.D. in Physics (major in Optics) from the Institut Fresnel, France in 2006.
She joined CILAS in 2003 for its Ph.D. thesis on Laser-Induced damage in optical components, then worked as development engineer, project manager and now product manager in the field of optical thin films components.