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Proceedings Paper

Digitized rugate filters for laser rejection
Author(s): John Allen; B. Herrington
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Paper Abstract

The paper describes the design and manufacturing techniques used to produce digitized rugate filters for laser rejection in an ophthalmic microscope. The design is synthesized from the refractive index profile necessary to give the required bandwidth, attenuation and angle of incidence constraints. Process control using quartz crystal deposition and broadband diode array radiometer to monitor real time thin film growth is described. The results are presented showing close agreement between theoretical design and measured spectral performance. Further work to extend this technique to multiple laser line rejection is outlined.

Paper Details

Date Published: 2 November 1993
PDF: 6 pages
Proc. SPIE 2046, Inhomogeneous and Quasi-Inhomogeneous Optical Coatings, (2 November 1993); doi: 10.1117/12.163542
Show Author Affiliations
John Allen, Omitec Thin Films Ltd. (United Kingdom)
B. Herrington, Omitec Thin Films Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 2046:
Inhomogeneous and Quasi-Inhomogeneous Optical Coatings
Jerzy A. Dobrowolski; Pierre G. Verly, Editor(s)

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