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Subject: Materials for AR coatings

Date: 02/22/02 at 2:34 AM
Posted by: Hemang Jesrani / Astro Optics Pvt. Ltd.
E-mail: info@astro-optical.com
Message Posted:

What materails does everyone normally use for broadband AR coatings in visible region. I have used Substance1 as high index material but it is not a good material to evaporate and not available anymore. TiO2/SiO2 coatings are not giving good results for AR coatings, nor do Ta2O5/SiO2 (too much absorbing) as per my experience. What materials are available that give consistent result. The problem is especially for high index material. I have MgF2 and Al2O3 as low and medium index materials. I need for multi-layer ARC and not single layer MgF2.

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