What is the composition of optical lens glass? What is its purpose?

Optical glass is a type of glass that can change the direction of light propagation and alter the relative spectral distribution of ultraviolet, visible, or infrared light.

What is the composition of optical lens glass

Optical lens glass is made by mixing high-purity oxides of silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium, etc. according to a specific formula, melting them at high temperature in a platinum crucible, stirring them evenly with ultrasonic waves to remove bubbles, and then slowly cooling them down for a long time to prevent internal stress in the glass block. After cooling, the glass blocks are measured by optical instruments to verify their purity, transparency, uniformity, refractive index, and dispersion rate to meet specifications. Qualified glass blocks are then heated and forged to form optical lens blanks.
What are the uses of optical lens glass.

Optical lens glass can be used to manufacture lenses, prisms, reflectors, and windows in optical instruments. Commonly used as lenses, prisms, reflectors, etc. for telescopes, microscopes, cameras, etc.