stewardwildcat - Slashdot User

Comment Re:That is the casting done. (Score 1) 114

by stewardwildcat on Wednesday September 03, 2008 @12:06PM (#24860443) Attached to: "Perfect" Mirrors Cast For LSST

It will be more accurate than the Hubble mirror and is tested holographically routinely to measure every detail of the surface of the mirror. When it leaves the Lab it will be one of the best surfaces in the world.

"Perfect" Mirrors Cast For LSST 114

Posted by kdawson on Tuesday September 02, 2008 @08:25PM from the billion-pixels-of-goodness dept.

eldavojohn writes "The Large Synoptic Survey Telescope (which was partially funded by Gates & Co.) announced a world record casting for its single-piece primary and tertiary mirror blanks, cast at the University of Arizona. From the announcement: 'The Mirror Lab team opened the furnace for a close-up look at the cooled 51,900-pound mirror blank, which consists of an outer 27.5-foot diameter (8.4-meter) primary mirror and an inner 16.5-foot (5-meter) third mirror cast in one mold. It is the first time a combined primary and tertiary mirror has been produced on such a large scale.'"

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