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Robo Foucault Open Source Software?

(6)
Dale, Well, after reading more of your posts and comparisons with old Robo-Foucault and Bath Interferometer results, I've decided to not move forward with my
kingjamez80
6
posts
Mar 22

Roller Chain

(15)
Thanks for clearing that up and linking to the cloudynights discussion.  I'll have to go and read those. I have some machine shop experience and recently
Roger
15
posts
Mar 18

piepan sun spot

(1)
somebody have more info about this video Piepan Sun Shot https://www.youtube.com/watch?v=5-83uAnefcA it look interssting but less info or< howto jack 47'n
savardjacques@ymail.com
1
post
Mar 16

Holomask -further ideas on CloudyNights.

(2)
That is so cool! Thanks Ric for pointing this out. I'll have to read up on the theory of operation. Sent from my iPad
radicell2
2
posts
Mar 2

cut a secondary at 45

(4)
Bon Soir, Jacques. Your problem is the aluminized coating. We apply a waterproof lacquer or shellac directly to the aluminum. We then wax and apply lens tissue
savardjacques@ymail.com
4
posts
Feb 21

Adventures in making an optical flat

(20)
I made an 8-inch Pyrex optical flat back in those days at E & W for my personal use. I would do the final testing of optical flats against their 10-inch fused
Guy Brandenburg
20
posts
Feb 16

12" Mirror Sanity Check

(10)
Thanks to all for your comments. My Foucault tester's light source moves with the knife edge so my numbers seem to be correct according to your feedback. I
chris988797
10
posts
Feb 8

Ronchi grating

(10)
Doug, We do have beginners and members that travel 300 miles but not usually for the mirror making classes and not on a monthly basis. Private flying and the
Jeremy Royston
10
posts
Feb 7

Ronchi Images take 2

(3)
It's really hard to analyze the Ronchigrams because they are so small. The biggest issues are: 1. overcorrected 60-70% zone 2. zoniness Mel Bartels
optical_stargazer
3
posts
Feb 3

Ronchi software

(1)
See the bottom of this page http://www.atm-workshop.com/ronchi-test.html ... This email has been checked for viruses by Avast antivirus software.
Charles Mitchard
1
post
Feb 3

Ronchi image 20" mirror

(8)
Mel, Rick, After sending my discourse on making Ronchi measurements, I received Dick's email, listing the incremental settings of the grating. I agree with
optical_stargazer
8
posts
Feb 2

Ronchi Images

(6)
Are you sure? How are you testing for astigmatism? I can see some trace of it in almost all of the Ronchi images. It shows less in the ones far from ROC due to
optical_stargazer
6
posts
Feb 2

fine threads

(11)
There is a lot of lathe work to thread each section and connector but would be the strongest. This is how TeleVue attaches the lens cell to the aluminum tube.
charlesmitchard
11
posts
Jan 14

Re: [ATM] Fw: Distances required for star test are much too long.

(3)
Guy, Do not beat yourself up too much: We all get our turn in the barrel. Mark C.
Guy Brandenburg
3
posts
Jan 10

Distances required for star test are much too long.

(6)
Guy, And now you know why NASA and Northrop Grumman built a very elaborate test rig (the Beam Image Analyzer) to produce plane parallel light costing millions
Guy Brandenburg
6
posts
Jan 9
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