Optical Thin Film Coating Technology
2019 Course Description
Please note: The course descriptions and instructors listed below are NOT final, it is possible that circumstances beyond our control could necessitate alterations.
The course serves both as an introduction and a review for engineers and scientists of the principles of optical interference filter design while considering, in addition, recent advances in the current technology. Five sessions cover basic design techniques, coating types and their characteristics. The other five sessions include coating fabrication, substrate preparation, characterization, and digital design techniques. A tour of the University coating facilities stresses deposition and characterization methods and includes a tour of the OMEGA laser. Classes will start at 8:30 a.m. and end at 5 p.m.
June 17, Monday Morning
Design of Single-Layer Films, Dr. James B. Oliver
Index of refraction, absorption, dispersion, coating and substrate materials. Reflectance and transmittance of substrates and single-layer films, optical thickness, and interference. Coherent versus incoherent illumination.
June 17, Monday Afternoon
Coating Techniques, Dr. James B. Oliver
Review of various methods for producing optical films, thin film structure, optical and physical thickness monitoring techniques, uniformity, and process control.
Review of thin film structure and formation, vacuum environment, and components of a deposition system including evaporation sources, assist sources, and optical/physical thickness monitoring
June 17, Monday Evening
OMEGA TOUR: Laboratory for Laser Energetics, 240 East River Road
June 18, Tuesday Morning
Design-Anti-Reflection Coatings, Dr. James B. Oliver
AR Coatings: Single layer, two layer, multilayer, and gradient index. Graphical design techniques; computer optimization techniques.
June 18, Tuesday Afternoon
Tour of a large substrate coating facility for high peak-power lasers, Dr. James B. Oliver and Ms. Amy Rigatti
The students will see three areas: coating, cleaning, and characterization (surface metrology, damage conditioning, and photometry).
June 19, Wednesday Morning
Design-High Reflector Coatings, Dr. James B. Oliver
Dielectric reflectors: quarterwave stack, modified quarterwave stack, broad band reflectors. Order suppression, electric field profiles, rugate designs. Metal films, enhanced metal reflectors.
June 19, Wednesday Afternoon
Design-Band Pass Filters, Dr. James B. Oliver: Short and long wavelength and narrow band pass filters. Band pass filter design techniques: Herpin equivalent index, blocking methods. Metal-dielectric filters and graphical design techniques.
June 20, Thursday Morning
Design-Non-normal incidence, Dr. James B. Oliver
Polarization of light. Incidence angle effects on refractive index and filter design. Polarizing beam splitter and phase control coatings.
June 20, Thursday Afternoon
Methods of substrate motion in a deposition system, Dr. James B. Oliver
Modeling of thin-film uniformity, stresses in thin films, and process control for precision optical coatings.
June 21, Friday Morning
Design: Band-Pass Filters, Dr. James B. Oliver
June 21, Friday Afternoon
Optical Coatings and Color, Dr. Jennifer Kruschwitz
Coating designs used in color applications: lighting, display, anti-counterfeiting and iridescent pigments, color targets, sunglasses, architectural, etc. Color spaces (i.e. 1931 Chromaticity Diagram, CIELuv, CIELab) and color difference formulas.