How to test a parabolic mirror?

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To test a parabolic mirror, users recommend methods such as the Ronchi test and the knife edge test, both of which can effectively evaluate the mirror's quality. Observing the mirror during its first light can also reveal any issues with performance. Coulter Optics is noted for producing high-quality mirrors, which may reduce the likelihood of significant problems. Proper alignment of the parabolic mirror is essential for optimal optical performance. Overall, these testing methods are crucial for ensuring the mirror meets desired specifications.
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Hi,

I just ordered my first primary mirror (10") for DOB from Coulter Optics.
I want to test it after it arrives. Does anyone has expirience with testing/checking params for parabolic mirrors?

Clear skies!
 
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If you feel so inclined to do so, then a http://www.telescopemaking.org/ronchi.html" will do the trick.

Or, at first light any problems will become evident.

However, Coulter Optics I have found produces quality products.
 
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Thanks a lot, Waveform - this is exactly what I need!
 
The knife edge test is also good - http://www.fvas.net/victor/testing.htm
 
Hi

How to align parabolic mirror for optical beam?
 

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