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"HT" & "HTultra" Glass

OPTICAL GLASSES WITH ULTRA-HIGH TRANSMITTANCE

As part of its extensive portfolio of optical glass types, SCHOTT has been offering special glass variants that are known for their superior transmittance. These special  glass types with significantly improved transmittance, all being identified with the suffix "HT" or "HTultra", are especially suitable for digital projection and high end optical systems.
Our current portfolio includes 12 "HT" and "HTultra" glasses, e.g. N-BK7HT, N-SK2HT and is continuously extended, whereas the new glass type N-BAK4HT, the high refractive index glasses N-LASF9HT and N-LASF45HT, as well as N-SF57HTultra and N-SF6HTultra exhibit the best transmittance values available in the market.
"HT" and "HTultra" glasses are provided as raw material, as pressings and in the form of finished components.