Ningbo Zhishi, your answer: There are probably many friends who are not very clear about the differences between calibration plates made of different materials, such as ceramic and optical glass. Our ceramic material calibration plate can reduce the reflectivity by 80%, and has excellent characteristics of high temperature resistance, wear resistance, and chemical corrosion resistance. Moreover, it has a low density, so in terms of optical performance, whether it is whiteness, transparency, or glossiness, it is very good.

Soda glass calibration plate is a commonly used optical material with stable chemical properties and good accuracy. This material is free of impurities and bubbles, making it a good material for high-precision calibration plates. Moreover, its price is not expensive. The refractive index of this calibration plate is 1.6x10 to the negative 6th power, and its color differentiation is also included. The calibration plate used in Russia is silver in color; Germany and neighboring countries around Austria have blue calibration plates; The calibration plates in the United States and Japan are all yellow in color. The color of the domestically produced calibration plate is yellow, which is determined by the coating process. However, the quality of the calibration plate cannot be judged solely by color.

The calibration plate made of quartz material has good light transmittance and its advantage is that its coefficient of expansion is relatively small. During the calibration process of the instrument, it is less affected by environmental temperature. The corresponding cost is also very high. Quartz materials are divided into JGS1 and JGS2. JGS1 is expensive. JGS2 is relatively cheap with bubbles inside.

The calibration board made of matte material has a matte finish, which is relative to polishing, that is, a non glossy surface. It can avoid light pollution and is more convenient to maintain. The surface of Yaguang is a bit rough, like the surface of frosted glass. Reflected light is diffuse reflection, and there is also a calibration plate made of metal material. The advantages of this type of calibration plate are its resistance to impact and durability, but its disadvantage is also prominent, which is that there is almost no accuracy in terms of accuracy. Therefore, friends who want to purchase high-precision calibration plates generally do not choose metal materials