5 October 2005 Comparison of gradient index and classical designs of a narrow band notch filter
Author Affiliations +
Abstract
Rugate structures, as well as gradient refractive index films in general, attract a lot of interest. The gradient index systems may provide advantages in both, optical performance and mechanical properties of the optical coatings. Rugates have shown to be especially interesting for design of notch filters. A lot of theoretical work on design of rugate filters has been done in the last decades. However, only few of the designs could be deposited, which is often caused by practical problems, e.g. preparing materials with the desired refractive index values. In this paper two different gradient refractive index designs are compared to a classical high-low stack. One gradient design is synthesized by an apodized sinusoidal structure that is approximated by homogeneous sublayers. The other one is based on an apodized sinusoidal structure as well, but it is approximated by a hybrid structure, i.e. a combination of linear gradient index ramps between the lowest and the highest refractive index applicable and homogeneous layers of high index values. The two gradient designs take into account the constraints posed by limitations of the real deposition systems. Both designs are compared to a classical high-low stack and the advantages and drawbacks of each approach are commented.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vesna Janicki, Vesna Janicki, Marc Lappschies, Marc Lappschies, Björn Görtz, Björn Görtz, Detlev Ristau, Detlev Ristau, Uwe Schallenberg, Uwe Schallenberg, Olaf Stenzel, Olaf Stenzel, Norbert Kaiser, Norbert Kaiser, } "Comparison of gradient index and classical designs of a narrow band notch filter", Proc. SPIE 5963, Advances in Optical Thin Films II, 59631O (5 October 2005); doi: 10.1117/12.624640; https://doi.org/10.1117/12.624640
PROCEEDINGS
7 PAGES


SHARE
RELATED CONTENT

Narrow band infrared filters with broad field of view
Proceedings of SPIE (May 18 2006)
Using wavelets to design gradient-index interference coatings
Proceedings of SPIE (November 02 1993)
Optical monitoring of rugate filters
Proceedings of SPIE (October 05 2005)
Rugate and discrete hybrid filter designs
Proceedings of SPIE (October 01 1997)

Back to Top