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ANTIREFLECTION OPTICAL COATINGS FOR THE SPECTRAL RANGE nm 700 400-, nm 900 400- AND nm

Gh. Honciuc1,* , Gh. Singurel2

Affiliation

  1. S.C. Pro Optica S.A., Aleea Bucovina 4, RO-74404, Bucharest-Romania
  2. “Al. I. Cuza” University, Optics-Spectroscopy Depart., Iasi-Romania

Abstract

The work is devoted to the design of high performance antireflection (AR) coatings for VIS and NIR spectral range for volume production. The task was to overcome the difficulty to obtain high quality coatings, with optical constants and geometrical thickness to be in close tolerances: the first step was to use optical materials with stable optical constants, easy to be reproduced in the volume production and secondly, to reduce as much as possible the number of thin layers, in order to reduce the probability of errors. The design of such AR coatings is considered, taking into account the above mentioned conditions. The needle optimisation method, a synthesis method, was approached. To reduce the number of layers, the Herpin equivalent was used – to search for an equivalent layer made of a material with a refraction index very close to the equivalent refraction index of the equivalent layers. The optimisation process goes on in this circumstance until no more thin layers could be equivalently done..

Keywords

Optical coating, Coating design, Antireflection.

Submitted at: June 10, 2004
Accepted at: Dec. 6, 2004

Citation

Gh. Honciuc, Gh. Singurel, ANTIREFLECTION OPTICAL COATINGS FOR THE SPECTRAL RANGE nm 700 400-, nm 900 400- AND nm, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 4, pp. 1199-1205 (2004)