"Neutral optical glass" Deflection: semi-tempered glass scrambling degree greater than the glass smaller than annealed glass. "Neutral optical glass" Thermal stability: Thermal stability is also significantly better than annealed glass, ordinary glass half treated steel can withstand a temperature difference of about 75℃. Semi-tempered glass will not explode. Note: "Neutral optical glass" high-temperature glass products because the temperature is relatively high, the product is generally semi-steel processing, can not achieve complete steel, tempered glass is enhanced crush resistance strength and thermal stability.
Source:
http://www.yxingoptics.com