GENERAL KNOWLEDGE

Detailed explanation-1: -In the optical glass industry, flint glass is any highly refractive lead-containing glass used to make lenses and prisms. Because it absorbs most ultraviolet light but comparatively little visible light, it is also used for telescope lenses.

Detailed explanation-2: -Optical glass is a high purity glass used in the production of lenses needed for high precision as in spectacles, telescopes, microscopes, cameras, etc. The major raw materials for these are sand, soda ash, lead oxide and boron.

Detailed explanation-3: -Flint glass is combination of silicon dioxide (SiO2) with lead or potassium. It creates a relatively high refractive index and high degree of light dispersing power compared to other types of glass. Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less.

Detailed explanation-4: -Prisms are usually made of glass, but any material can be used as long as the material is transparent and suitable to the designed wavelength. Common materials include glass, plastic and fluorite. Prisms are designed with different surface angles depending on the application field.