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greedyshark
super member
Reged: 10/31/05
Posts: 188
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Question for the group...It's my understanding that Questar figures current quartz substrate on the Q 3.5 to at least 1/10 wave front. Does anyone know how long this quality standard has been in place?
Charles
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EddWen
sage
Reged: 04/26/08
Posts: 409
Loc: Here or There
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Well, Questar doesn't figure any glass. That is all done by Cumberland Optical. Various wave front numbers have been attributed to Questar, and I believe they are the total throughput of the system at the axial port, i.e., the result of four optical surfaces. To achieve this, the assembly/collimation must be very accurate (done by Questar) and the surfaces probably average about 1/50 wave.
For more information, Company 7 seems to have more stuff on their web site than does Questar.
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Edd Weninger
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