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Hi Vince, Thanks for your email and the information on the photodiodes you are using. Could you send information on the aluminum doped InGaAs photodiode you ...
Hi All, Below is the final agenda for the Alt-Az Initiative workshop at the American Astronomical Society's summer meeting in Pasadena, CA, this weekend. All...
Hi Steve, Very good input. With a higher fusing temperature, the LTE-28 Foamglas might not work well for fusing with soda lime float glass. On the other ...
Hi John, Good input. I think it's done digitally: they use a larger CCD sensor than the final image size and shift the recorded images (in space) before saving...
... I think the image stabilization in Canon's binoculars and camera lenses uses an actuated lens element which tips and tilts to counteract motion which is...
Hi David, Very interesting idea (below). I looked up "tessellation" and pasted in a sentence from Wikopedia. A tessellation or tiling of the _plane_ ...
Russ, This is effectively what the lucky imaging guys do with the registration and stacking software. If you record the image stream it can be done as a post ...
I had a guy bring a microscope camera in a few months ago that actually had piezo actuators on the chip to move it around ( X & Y ) so an 8 meg chip was like a...
Yes...................... What is wrong with this idea ????? It gets around the big single sheet of glass problem, and with a water jet the cutting is not...
Never one to make a suggestion and then wait for permission I cut the glass last night, (crudely), and glued up an 18 inch F3 prototype this morning. I used...
The reason I began to explore this direction was due to the big sheet of glass. I bought and worked with a 1/2 inch piece of glass 60 inches in diameter. Now I...
Hi David, Thanks for posting to the group. I very much like your comments on handling the 60 inch glass, large kiln, etc., and how this departs from what a ...
Oh man..................... you dint even give me one day to beat you at this. I was gona try to gin up a crude prototype last night but had to machine up a...
Dave, I agree on all accounts. Lets get a test run to see if there are any surprises in the small scale then lets go large. I have enough 2" foam at my place...
Still polishing on the fused blank. I did get ten wets in on the tessellated blank. I touched about 50% of the glass so the curve is pretty close. Not bad for...
Dave, Is the foam flat and you just bonded on some flat hexagons ??? Is the foam curved and you bonded on some flat hexagons ??? Is the foam curved and you...
The foam is 18 inches square. It has an F3 curve ground into it, (sagitta of about 3/8ths inch). The glass plates are flat for the most part. A few of the edge...
Hey gang, I spoke with a mirror maker last night and was informed that lots of little hexagons on the surface of a mirror will act to create all kinda...
Well, the prototype is working along. It is unremarkable in that it is just another mirror from the grinding standpoint. What I can tell you? When I started I...
Dave, I confirmed that I can use the water jet to cut the glass to make the hexagons if we decide this will work. Making 10 or 110 is the same favor so I just...
I did some pricing today. I have a guy in Hillsboro that will do the hexagons in 3/16th plate glass for $3.75 each. The foam glass is in Portland, $6.25 a...
So, I put a flash polish on the little hexes. This is a technique to get some idea of the general figure of a piece of glass. It is a very poor polish and in...
That is great. I am looking into the water jet idea. I may have a 3" hex cut so we can run a few smaller test ( like a serious 18" made with MILBOND or...
Hi David and Andrew, Just back from the Pasadena AAS Alt-Az Workshop. Wonderful time with excellent talks. I'm catching up on emails. Read through your Yahoo...
Dan Cassero (and Bill Kelley), Hi Dan and Bill, I really enjoyed visiting Bill in person in Cottonwood AZ, and talking with you on the phone. Fine work on...
I'm working to document the history of robotic telescopes, as it develops, and while the major contributors of the past are still with us. I will present an...
Off the cuff I'd say yes; robotic scopes do learn. Successful data is kept and settings used to acquire that data is kept. Given a target in the same general...
Hello Alt-Az Initiative Yahoo Discussion Group, I've been working on the design of a 1/5 meter "test bed" telescope to evaluate various 1.5 meter lightweight...
Dave, Just got to this e-mail. Are we still talking about you and me making a 60" mirror ???? We need to set up a plan if we are going to do this. I have...
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
- Yahoo! Groups & Yahoo! Calendar Team
