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Old August 5th 04, 09:46 AM
Geoff
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Default Making a "Fake Star" for Optics Testing

On Thu, 05 Aug 2004 00:48:51 GMT, "Derek Overdahl"
wrote:

I am looking for suggestions on how to create a "Fake Star" that I can use
for indoor - daytime - optics testing.


If you want to evaluate optical accuracy, the light from your source
needs to be firstly a point source, and secondly far enough away that
all light rays entering your scope are close as possible to parrallel.

This means that the light source should be as far away as possible, ie
over 100 metres depending on the aperture of the scope. If not , the
'star test' will show false spherical abberation.