Table of Contents
Reflections from a Lens Surface
READING ASSIGNMENT
Basics
At the surface
How much reflects at the surface?
Traveling from air to crown glass:
What does 0.04296…. mean?
So 0.04296…. Means:
In your calculator:
Entering or Exiting?
But all the light did not get there:
Multiplying percents
So, 91.6% gets through the glass
But there is more reflection from the internal reflections . .
In the calculator:
So how much is left?
Summary, so far:
Note:
So much for crown glass . . .
Transmission through the 1.66 index lens
Do a few more for yourself:
Table of results
Think about it
Surface reflections in glasses
When are reflections a problem?
Bothersome reflections
Controlling Surface Reflections
Controlling Surface Reflections
Controlling Surface Reflections
Controlling Surface Reflections
Controlling Surface Reflections
What is an AR Coating?
Attributes of an AR coating
1. Opposite phases?
Destructive Interference
Early AR Coatings
2. Amplitudes equal?
Choosing an material by it’s index
Coatings on glass
Coating on Plastic
Hydrophobic?
Safety requirements
Review?
Different formulas
References
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Author: Ellen Stoner
Email: ellen@stoner.org
Home Page: http://courses.durhamtech.org/opticianry/oph142/
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