TENNESSEE EQUIPMENT MODERATED NEWSGROUP AND LIST > Midwest
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> New 50MM 1/10TH wave optical flat / window
New 50MM 1/10TH wave optical flat / window
02 WBK 326. ORIGINAL COST: $140.00. Made of BK7 glass, 1/10th wave surface accuracy on both sides, parallelism is 5 arc seconds.
Thickness is 10mm, surface quality is 60-40 scratch and dig.
BK7 glass is great because it's relatively hard and does not scratch easily under normal use. It also has excellent transmittance even as low as 350nm.
Unused in individual plastic cases.
An amazing value at our regular very low price. Closing these out at an incredible price!!