Manufacture of optical lenses
Manufacture of optical lenses The optical glass is mixed with the oxides of high-purity silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium and other oxides according to a specific formula, melted in a platinum crucible at high temperature, and stirred evenly with ultrasonic wave to remove bubbles; Then slowly cool down for a long time to avoid internal stress of the glass block. The cooled glass block must be measured by optical instruments to check whether the purity, transparency, [...]
