Precision Annealed Supremax Telescope Mirror Blanks
Corning no longer produces Pyrex for optical use, however Advanced Glass Industries has a limited stock of Pyrex in house. AGI also supplies Schott SUPREMAX 33 mirror blanks. SUPREMAX 33 is a borosilicate Pyrex equivalent, and is an excellent alternative for telescope mirror blanks. Our blanks have the following standard characteristics:
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Precision annealed material (6 Mu or less guaranteed)
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Edges diamond ground with a 220 grit finish
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Dimensional tolerances +/-.010”
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Main face diamond ground flat to .033” with a 120 grit finish
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Curves diamond generated to +/-1% of radius with 120 grit
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All edges chamfered