There are many varieties of glass, in which optical glass is one of them, it is able to change the light transmission bias. It is widely used in optical instruments, such as lenses, prism, etc.. Optical glass, it must be satisfied with the requirements of the light, it is not more than ordinary glass, the quality of the optical glass is also very high. Qualified optical glass it needs to meet the following requirements.

Chapeau, optical glass optical constants and unified group of glass optical constants for differences, first type optical glass of different wavelengths of light are rules of the standard index of refraction, serve as the basis for the optical system for optical planners plan.

The workshop production of optical glass optical constants required in these values must allow the category bias within, or will make the practice of into image quality with the plans for the expected consequences of inconsistent and affect the quality of optical instruments. At the same time, because the same batch of instruments often use the same batch of optical glass manufacturing, in order to facilitate the difference correction of the instrument, the refractive index of the same batch of glass to allow more than they and the norm value of the bias even more severe.

Secondly, it needs to be highly transparent, optical system imaging brightness and transparency of glass is proportional to. Optical glass of a lit light wavelength in the light absorption coefficient K performance. Light passes through a series of prism and lens, its energy is consumed at the interface of optical element to reflect and another part is medium (glass) oneself draw lessons from. The former with glass refraction rate increases increases, the high refractive rate of glass this value very large, such as the heavy flint glass appearance of a light reflecting consumption about 6% about.