The Fabry Perot Etalon
Here you see the entire Etalon.
The surfaces are coated with a reflective material
and spaced around 100 to 200nm apart. Based on the destructive
interference of light, unwanted rays are cancelled out and desired rays are passed.
The type of material separating
the two filters, the amount of reflectivity, ambient air pressure
and most importantly, the distance between them, determine the bandpass of the filter or how much solar detail you’ll see.
Why Ha? |
The View |
What you see |
The Chromos |
Ha Emission |
Bandwidth |
Main Designs |
Ha Components |
Rear Filters |
The Etalon |
Front Filters |
Coronado filters |
DayStar Filters |
Solar Spectrum Filters
