What are the commonly used optical glasses?

  Optical glass is a kind of glass who can change the direction of light transmission,also can be used in the manufacture of optical instruments in the lens, mirrors, etc. There are many types of optical glass. The production of optical glass is mainly made of high quality quartz sand, this kind of glass like some cameras, telescopes, etc. will be used.
1. Colorless optical glass
  It has a specific requirement for optical constants, with a high visible area, no choice to absorb coloring and other characteristics. According to the size of the Abbe number is divided into crown and flint glass, all kinds of high and low according to the refractive index is divided into several kinds, according to the size of the order of refraction. It is used as a telescope, microscope, camera and other lenses, prisms, mirrors and so on.
  2. Anti - radiation optical glass
There is a high absorption capacity for high energy irradiation, with high lead glass and CaO-B2O2 system glass, which prevents gamma rays and X-ray irradiation, which absorbs slow neutrons and thermal neutrons, mainly for nuclear industry , Medical field as a mask and peep window material.
  3. Radiation - resistant optical glass
In some γ-ray, X-ray irradiation, the visible area permeability changes less, varieties and grades are the same as colorless optical glass, for the manufacture of high-energy irradiation under the optical instruments and peep window.
  4. Colored optical glass
Also known as filter glass. Visible, visible, infrared specific wavelength selective absorption and permeability, according to spectral characteristics are divided into selective absorption, cut-off and neutral gray. According to the coloring mechanism is divided into ion coloring, metal colloid coloring and sulfur selenide coloring, mainly used in the manufacture of filters.
  5. UV and infrared optical glass
  In the ultraviolet or infrared band has a specific optical constant and high transmittance, used as UV, infrared optical instruments or as window material.
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