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What requirements does an customized Optical Element need to meet to qualify
There are many types of customized Optical Element, among which Optical Element is one of them, which can change the propagation direction of light. It is widely used in lenses, prisms, etc. of optical instruments. Customized Optical Element It must meet the requirements of optical imaging, it is not better than ordinary glass, and the quality requirements of customized Optical Element are also very high. Qualified customized Optical Element it needs to meet the following requirements.
First, the optical constants of the customized Optical Element and the same batch of glass must be consistent. The first type of optical glass has a specified standard refractive index value for different wavelengths of light, as the basis for the optical designer to design the optical system.
Therefore, the optical constants of the customized Optical Element produced by the factory must be within a certain tolerance range of these values, otherwise the actual imaging quality will not match the expected results during design and affect the quality of the optical instrument. At the same time, because the same batch of instruments are often made of the same batch of optical glass, in order to facilitate the unified calibration of the instruments, the allowable deviation of the refractive index of the same batch of glass is stricter than their deviation from the standard value.
Secondly, the customized Optical Element needs to have a high degree of transparency, and the brightness of the optical system imaging is proportional to the transparency of the glass. The transparency of optical glass to light of a certain wavelength is represented by the light absorption coefficient Kλ. After the light passes through a series of prisms and lenses, part of its energy is lost to the interface reflection of the optical components and the other part is absorbed by the medium (glass) itself. The former increases with the increase of the refractive index of the glass, and this value is very large for the high refractive index glass, such as the reflection loss of a surface light of the heavy flint glass is about 6%.