Thin Film Heater for Removable Volatile Protecting CoatingsReport as inadecuate

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The Scientific World JournalVolume 2013 2013, Article ID 928062, 3 pages

Research ArticleIqra University, Defence View Shaheed-e-Millat Road Ext., Karachi 75500, Pakistan

Received 5 September 2013; Accepted 15 October 2013

Academic Editors: Y.-K. Gao and X. Jia

Copyright © 2013 Abid Karim. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Freshly coated aluminum mirrors have excellent reflectivity at far ultraviolet wavelengths. However, reflectivity rapidly degrades when the mirror surfaces are exposed to atmosphere. In order to avoid this problem, freshly coated aluminum surface can be protected by over-coating of a removable volatile protecting coating. This protecting coating can be re-evaporated by controlled heating or by some other methods when required. This type of removable coating has immediate application in UV space astronomy. The purpose of this paper is to demonstrate the feasibility of re-evaporation of removable volatile Zn protecting coating using a NiCr thin film heater without affecting the reflection properties of Al mirror surfaces.

Author: Abid Karim



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