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| subject: | ATM 16.5` mirror progress |
From: "Jerry B. Hillman" To: Reply-To: "Jerry B. Hillman" Hi all, Just an update on my progress. I am within maybe an hour of having this mirror completely polished out. Probably less. Slanted laser light shows a faint haze which matches the haze reflected from the inside back of the mirror. Foucault text shows a perfect sphere. The entire mirror nulls simutaneously. There is a very thin line of light around the entire mirror, almost invisible, when the mirror is nulled. The Ronchi test shows perfectly straight, perfectly even lines edge to edge. My next step, after a little more polishing, is to parabolize it. Then build the mount and tube and star test it. I'll keep you posted. Clear skies, Jerry --- BBBS/NT v4.00 MP* Origin: Email Gate (1:379/1.100) SEEN-BY: 633/267 270 @PATH: 379/1 633/267 |
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