Paper
1 October 1997 Rugate and discrete hybrid filter designs
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Abstract
The combination of discrete and Rugate filter design techniques can provide unique design advantages. Rugate filter deposition techniques can be applied to discrete, and square wave based designs as easily as they are applied to sine wave index profiles. Just as apodization reduces sidelobes about a Rugate stop-band, apodization reduces sidelobes of a square wave filter. This paper builds on these observations to present designs which superimpose sine and square wave profiles to produce a more efficient use of the design space. Techniques are presented for moving back and forth between discrete and Rugate designs to achieve reduced film thickness, more efficient use of index contrast, and harmonic suppression.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Thomas D. Rahmlow Jr. and Jeanne E. Lazo-Wasem "Rugate and discrete hybrid filter designs", Proc. SPIE 3133, Optical Thin Films V: New Developments, (1 October 1997); https://doi.org/10.1117/12.290199
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CITATIONS
Cited by 9 scholarly publications and 17 patents.
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KEYWORDS
Apodization

Optical coatings

Absorbance

Optical filters

Linear filtering

Gradient-index optics

Modulation

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