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Table of contents

The Authors - David Hall

The Authors – John Duchek

An Eyepiece Coating Experiment

What do the terms mean?

Single Coating (MgF2)

MgF2 Characteristics

“The principle of coatings is to reduce the light reflecting on the glass surface. If the coating has a ¼ wavelength thickness and the glass an index of refraction higher than the coating the 2 reflections are in phase opposition and cancel. For 1 multicoated surface, the transmission can increase up to 3.5%”

How do you know your coating is working as advertised?

The Experiment

Set up

Experimental Limitations

The method for each eyepiece (1)

The method for each eyepiece (2)

1.25” Eyepiece Results

2” Eyepiece Results