1, colorless optical glass: there are specific requirements for optical constants, with a visible area of high transmission, no selective absorption of coloring and other characteristics. According to the size of the Abbey number is divided into coronal and flint glass, all kinds of refractive index is divided into a number of species, and according to the refractive index of the size of the sequential arrangement. Used as telescopes, microscopes, cameras and other lenses, prisms, mirrors, etc. 2, anti-irradiation optical glass: high-energy irradiation has a very large absorption capacity, there are high-lead glass and CaO-B2O2 system of glass, the former can prevent γ-rays and X-rays from irradiation, the latter can absorb slow and thermal neutrons, mainly used in the nuclear industry, the field of medicine as a shielding and peeping window materials. 3, irradiation-resistant Optical glass: in a certain γ-ray, X-ray irradiation, the visible area of the transmittance changes less, varieties and grades with the same colorless optical glass, used in the manufacture of high-energy irradiation under the optical instruments and peep windows. 4, tinted optical glass

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