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Proceedings Article

High performance notch filter coatings produced with PIAD and magnetron sputtering

[+] Author Affiliations
M. Scherer, H. Hagedorn, W. Lehnert, B. Romanov, A. Zoeller

Leybold Optics GmbH (Germany)

U. Schallenberg

mso jena Mikroschichtoptik GmbH (Germany)

Proc. SPIE 7101, Advances in Optical Thin Films III, 71010I (September 25, 2008); doi:10.1117/12.797699
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From Conference Volume 7101

  • Advances in Optical Thin Films III
  • Norbert Kaiser; Michel Lequime; H. Angus Macleod
  • Glasgow, Scotland, United Kingdom | September 01, 2008

abstract

For Notch Filters, Rugate designs with a small index contrast and apodisation are well known in the literature. The required deposition of gradient index layers or so called flip flop structures is very complicated and difficult to manufacture. Higher order H/L stacks of coating materials with high index contrast result in very thick layer stacks. In our approach we replace the second refractive index by equivalent layers consisting of H/L materials with high index contrast. This leads to a combination of thick (>100nm) and very thin layers. Stable coating processes with dense layers are strict requirements. Another challenge is the accurate thickness control of very thin layers in the nanometer range. Single notch filters were produced with PIAD and broad-band optical monitoring. The most challenging filters were demonstrated with magnetron sputtering and monochromatic optical monitoring. Some outstanding results of single and multiple notch filter coatings will be presented.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

M. Scherer ; U. Schallenberg ; H. Hagedorn ; W. Lehnert ; B. Romanov, et al.
"High performance notch filter coatings produced with PIAD and magnetron sputtering", Proc. SPIE 7101, Advances in Optical Thin Films III, 71010I (September 25, 2008); doi:10.1117/12.797699; http://dx.doi.org/10.1117/12.797699


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