How to test a parabolic mirror?

  • Context: Undergrad 
  • Thread starter Thread starter sergeant_pv
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    Mirror Test
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Discussion Overview

The discussion centers around methods for testing and aligning a parabolic mirror, specifically in the context of amateur telescope making. Participants share their experiences and suggest various techniques for evaluating the mirror's performance.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about testing parameters for a newly ordered 10" primary mirror from Coulter Optics.
  • Another participant suggests using a Ronchi test as a viable method for testing the mirror.
  • It is mentioned that initial observations during first light can reveal any issues with the mirror.
  • A different participant recommends the knife edge test as another effective testing method.
  • There is a separate inquiry regarding the alignment of the parabolic mirror for optical beam applications.

Areas of Agreement / Disagreement

Participants present multiple methods for testing the mirror, but there is no consensus on a single best approach. The discussion remains open with various suggestions and inquiries.

Contextual Notes

Some methods mentioned may depend on specific conditions or setups, and the effectiveness of each testing method may vary based on individual experience and equipment.

sergeant_pv
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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.
 
Last edited by a moderator:
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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