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by gallamine
4290 days ago
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A quick check of Thorlabs (supplier of optics) shows that their Sapphire windows have < 90% transmission, while their Fused Sillica or BK7 windows have 90% - 95% transmission. Granted, those may be different from the current Apple glass (anyone know the exact variety) but < 90% transmission isn't all that hot. |
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