Seriously this time... This looks like it would the ultra-thin 3/16 or so inch mirror. And if so it shows some interesting defects that I would say look...
Dale #1 Looks like a pond on a windy day. #2 Looks like a 16" flat with some convex power tested double pass at 45 degrees with a spherical reference. AKA...
Good evening, - a close up of an onion - observing outside the ROC - temperture and air turbulence - the rings each represent a wave length of light and is too...
Actually, polishing submerged can provide LIQUID flotation that removes some of the deformation due to mirror weight. Of course, polishing pressure is not...
... Is this the mirror in the hallway next to the picture of "dogs playing poker". ;0) I've never produced a mirror with this many problems or seen a Ronchi ...
Bob May has been very quiet lately. Did the criticism of his quoating policy chase him away or is he ill? Do you know/ I don't recall if you watch the atm...
The first image looks like the Munche painting "The Scream". Jarvis Krumbein Dale Eason <atmpob@...> wrote: I thought ronchi users might like to take a...
... YOU ... attack. ... work ... see ... to ... estimate ... figuring ... thanks. I had to do this with my small center hill before. I tried two one-minute...
... this ... but ... spherical. ... like 3 ... what ... need to ... give you ... what ... random ... works ... center, ... on top ... can ... can ... the ... ...
Easy .You had two pieces of too thin glass and decided to glue them with epoxy, then later at polishing you got a surprise !! I know because I made the same...
... quoating ... more ... list up ... it ... don't ... ultra ... board. I'm ... and ... a ... waves. ... lol, yeah. Richard was the one who took a crow bar...
I am using a mirror David Davis sent me. It is thicker than the one I used in the Ronchi quiz. It too has been slumped over a form. I think it is 3/8 inch....
Dale: Very nice. You are doing things that many of us have talked about, but have never quite got around to doing, so thanks for sharing. I did have a couple...
Scott, Since I have worked with the data, I will venture some opinions. First, I would like to mention that my animations both left out the primary spherical...
... Oh yes, I think it does have primary astig. I just have not found a way to seperate it from the test stand yet. I was surprised by my inability to...
Before I got David Davis's mirrors I had started measuring the effect of lateral support position on my 16x1 inch 20 lbs. plate glass mirror. That is I changed...
Dale & Steve: Maybe you have done this already? Another experiment intended to isolate sources of time-varying astigmatism would be to take several data frames...
I have not heard from Bob May lately. I am thinking of starting some 13" ribbed mirrors. To finish them, with my bad eyes, I will have to rig up a TV...
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