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Olivier Biot
Amused
*****

Reged: 04/25/05

Loc: 51°N (Belgium)
Testing optical flats - The Raleigh Water test
      #4214649 - 11/28/10 09:52 AM

Testing optical flats - The Raleigh Water test

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BoriSpider
Carpal Tunnel


Reged: 08/10/04

Loc: S.W.FLA
Re: Testing optical flats - The Raleigh Water test new [Re: Olivier Biot]
      #4215395 - 11/28/10 05:04 PM

FYI when I click on 'All Additions in the Last 30 Days'
link on the front page, then I click on link to this article,
the link doesn't work.


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BoriSpider
Carpal Tunnel


Reged: 08/10/04

Loc: S.W.FLA
Re: Testing optical flats - The Raleigh Water test new [Re: BoriSpider]
      #4215398 - 11/28/10 05:05 PM

lol.

And the link above doesn't have an article.


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bob71741
scholastic sledgehammer
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Reged: 02/16/08

Re: Testing optical flats - The Raleigh Water test new [Re: BoriSpider]
      #4215651 - 11/28/10 07:04 PM

Boris
click on the above link; then click on "download this article" to see and copy the "PDF"


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Olivier Biot
Amused
*****

Reged: 04/25/05

Loc: 51°N (Belgium)
Re: Testing optical flats - The Raleigh Water test new [Re: bob71741]
      #4215727 - 11/28/10 07:40 PM

This article is a PowerPoint slide show that was rendered in PDF so everybody could read it. There is no text version of the article.

There's the "Download this document" link at the top of the article where you can retrieve it.


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BoriSpider
Carpal Tunnel


Reged: 08/10/04

Loc: S.W.FLA
Re: Testing optical flats - The Raleigh Water test new [Re: Olivier Biot]
      #4215842 - 11/28/10 08:47 PM

Ah, I see. tnx.

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MKV
Carpal Tunnel
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Reged: 01/20/11

Re: Testing optical flats - The Raleigh Water test new [Re: Olivier Biot]
      #5002793 - 01/05/12 03:19 PM

I just stumbled upon this post and Ed Jones' The Raleigh Water test article where he says with regard to the testing an optical flat against a spherical mirror (better known as the Ritchey-Common test) that it is "[g]ood for testing spherical power but not great for localized areas."

In fact, the Ritchey-Common test can provide excellent information for 'localized area' if, instead of a point source, a diffuse light source and a Ronchi screen or a Foucault test are used.

The Ritchey-Common test is a comprehensive quantitative and qualitative analysis tool if you have a single piece of optics of unknown radius of curvature, and have no master flat to check it against.

Mladen


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