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Russ, Just finished testing two new V band photometric systems... Need to do the actual sky testing, but they look promising... it would be so much better...
Hi All, Below is a letter to NSF that provides them with a summary of some of the developmental programs underway. I am planning on giving a presentation ...
Hi Mike, I do hope to visit Scott and others at NSF this fall. I'm VERY interested in your 9 actuator / 54 point mirror support system! We are working on the...
Russ I am embarrassed to ask, since I live in Oregon and have a daughter that is planning on pursuing a PhD in astrophysics. I have actually never been to...
Craig, I’m forwarding your email to Rick Kang, outreach coordinator. Look for information in late spring for young scientist/imaging programming at PMO. Mel...
Russ, * Hi Reed and Chris, We started testing the mirror in the one meter telescope tonight. We built a ronci tester that can accommodate a digital camera....
Russ, * Hi Reed and Chris, We started testing the mirror in the one meter telescope tonight. We built a ronci tester that can accommodate a digital camera....
Hi David, Glad 60 inch blank arrived okay. No problem on pictures. We'll get plenty along the way. You would be MOST welcome on the 9th. Kiran will be here...
Hello, The Ronchi method is not very sensitive to astigmatism, and if the Ronchi lines are oriented parallel or perpendicular to the axis of astigmatism then ...
Interesting pattern, what I can see of it. I have found the chip in the cameras are easily saturated. I turn my tester intensity well down when I shoot...
Hi Dave, I don't know if the software exists, but the full mathematical treatment may be avialable. Cheers, Russ Hi Russ, The idea sounds wonderful. Do you...
Hi Reed and Chris-- * Hi Richard, Reed, and Chris (and David) It's WONDERFUL to hear that the telescope can track and that you have captured Ronchi lines....
Russ, * Hi Reed and Chris, Today we made good progress on the ronci testing. Attached is the baseline picture set. The telescope was set at near zero...
* Hi Reed and Chris (and All), * It looks like the Ronchi pattern also rotated, although perhaps not as much as would be expected? Good on the revised...
Hi Reed and Chris, Good on increasing the altitude to about 45 degrees so the mirror is primarily resting on the wiffletree instead of just on the two edge...
Hi David (and All), Thanks very much for your reply to my email. I’ve responded below. It does seem that a program of last-minute astrometry could help...
Russ, * Hi David, Many thanks for your helpful comments and clarifications. I’ll pass these on. [David] In your letter, you said (the text is my edited...
Hi Reed, Chris and Russ, Those are nice Ronchi images and some of the gross features are immediately apparent. Congratulations on performing the tests! ...
Hi Bruce and All, This is all quite interesting! Perhaps someone knows of a low cost laser/hologram that puts out a regular array of dots. I'll post to our...
Hi David, Thanks for your email and analysis. The tensioner was not applied for this test (if it had been, the results could have been much better). So ...
* Hi Lisa (and Lonny, John, Donny Hi Lonny, Hope all is well with you. I just wanted to check to see how things are going. John received our epoxy rods and...
Hi Lisa, Lonny, Michael, and All, One of the epoxy mirror options that might allow fairly straightforward FEA would be a mirror with an all-aluminum structure...
On the way to relatively expensive aluminum substrates, don't forget to give a passing thought to fiber reinforced cement. Dave ... From: russmgenet@... ...
Hi Greg, Evert, and All, Thanks for pointing out this software for the Hartmann test. I talked with Alan Holms at SBIG this morning. He has some software...
been using a test which is a combination of the LWT, Caustic & 1D Hartman (yubagold.com) w/t success. have to make a new precise mask for every diameter...
Hi Dave, David, Peter, Peter, Tong, Drew, Steve, and Mel, I would very much appreciate your comments on this matter. I'll pass them on to Vijay at Clemson....
Hi Lisa (and Kiran, Lonny, Vijay, Sagar, Genevieve, Bruce, and John), Good discussion yesterday on spin-cast epoxy mirrors and their substrates. As we...
Hi John (and Lisa, Lonny, Vijay, Bruce, Kiran, and Sagar), I completely agree with you. Highest priority is epoxy topping on flat aluminum substrates. ...
Scheduled Maintenance:
We are undertaking some essential, but extensive maintenance to improve Yahoo!
Calendar. Your Group Calendar is being migrated to a much improved version of
Yahoo! Calendar. During the maintenance period, you may not have access to your
Groups Calendar.
We sincerely apologize for this inconvenience. Your Groups Calendar is in great
shape and we are working to have it available again as quickly as possible
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