Ordinary glass
Ignoring chemical composition and curing temperature range, ordinary glass is obtained through melt supercooling. Due to increased viscosity, it possesses solid mechanical properties, and the transition from liquid to glass is reversible.
Optical glass
is made by mixing high-purity oxides of silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium, etc., according to a specific formula. This mixture is melted at high temperature in a platinum crucible, ultrasonically stirred to remove air bubbles, and then slowly cooled for a long period to prevent internal stress in the glass block. After cooling, the glass block must be measured with optical instruments to check its purity, transparency, uniformity, refractive index, and dispersion to ensure they meet specifications. Qualified glass blocks are then heated and pressed to form optical lens blanks.
Optical lenses possess high transparency, highly uniform physical and chemical properties, and specific optical constants. These properties are irreplaceable by ordinary lenses.
In today's rapidly developing scientific and technological world, eyeglass lenses made from new optical material resins far surpass ordinary lenses in terms of optical performance, safety performance, and ability to protect the eyes from harmful radiation.
