Cushing D. Enhanced Optical Filter Design

SPIE Press, Washington, USA, 2011. — 168 p.This book started as a short supplement to demonstrate how to improve the erformance of coatings beyond the techniques described in the standard texts by Macleod and Baumeister. The coatings are designed with TFCalc, but any of the available programs provide similar answers. The approach to designing is not mathematical in nature, but intuitive. I have more than 40 years experience building
coatings and filters, and I mostly used an optical monitor as the primary control because the desired esults were optical coatings, and other available methods of monitoring were unreliable. Early work used thermal sources without ion assistance, and the results for crystal monitoring were inconsistent. The stability of crystal monitoring has vastly improved with the energetic sources now available.
This allows for nonquarterwave layers that can be counted on to be within a reasonable tolerance. I have made edge filters with 30 layers that follow the theoretical curves within a few nanometers of cutoff tolerance.Basics
Methods of Deposition and Materials Used
Antireflection Coatings
Multilayer Films
Dichroics
Metal Films and Filters
All-Dielectric Bandpass Filters
Optical Monitoring
Fully Blocked Visible Filters
Fully Blocked Ultraviolet Filters
Nonpolarizing Transmissive Filters