Ion-beam sputtering allows broadband antireflection coatings on temperature-sensitive optics at process temperatures below 100°C. For GRIN lenses, they provide reflections of <1.5% on average across a wavelength range of 400 to 1000 nm. This allows a large wavelength bandwidth and large differences in the angle of incidence to be compensated.
Laser Components
Hudson, NH
[email protected]
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PRESS RELEASE
AR Coating of GRIN Lenses
Coating of Temperature-sensitive Optics
What has been hardly possible so far now becomes a reality! The complex coating of temperature-sensitive optics at process temperatures below 100° C is most promising – despite the long coating times required for such complex structures.
Most coatings are applied in high vacuum at temperatures well above 100° C which has a negative impact on some materials. This can lead to discoloration or malfunction.
LASER COMPONENTS has now succeeded in applying a broadband AR coating on such critical optics using IBS (ion beam sputtering). After coating, gradient-index (GRIN) optics were able to achieve an average reflection <1.5% in the range from 400 nm to 1000 nm. This allows a large wavelength bandwidth and large differences in the angle of incidence to be compensated.
More Information
http://www.lasercomponents.com/de-en/news/grin-lens-coatings/
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