OLCHING, Germany, Sept. 10, 2012 — The complex coating of temperature-sensitive optics at process temperatures below 100 °C, previously challenging, is now 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, leading to discoloration or malfunction.
Laser Components GmbH has succeeded in applying a broadband antireflection (AR) coating on such critical optics using ion beam sputtering.
After coating, gradient-index (GRIN) optics achieved an average reflection of <1.5% in the range from 400 to 1000 nm, enabling a large wavelength bandwidth and large differences in the angle of incidence to be compensated.
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