Ordinary optical glass mainly refers to traditional colorless optical glass used for various optical instruments, such as optical lenses, and colored optical glass used for filters. At present, there are 200 different grades of ordinary optical glass, the chemical elements in the periodic table has 2, more than 3 of the elements are introduced to the optical glass. For colorless optical glass, according to its chemical composition and optical constant characteristics, it is mainly divided into corona and Firestone. The content of PbO is generally less than 3% crown glass when the refractive index is relatively low (nd < 1.6), low dispersion (Md> 55) or a relatively high refractive index, low dispersion (nd> 1.6) (Md> 50) when the PbO content is more than 3, when the refractive index is relatively high (nd> 1.6), large dispersion (Md< 55). And each category can be further divided into many subclasses according to the characteristics of glass chemical composition, refractive index nd and dispersion Md. Figure 1 is colourless optical glass nd2Md.
Optical glass is the main material for the manufacture of optical lens and optical instrument. Xiamen Yi Wei te optical quartz glass (in ordinary borosilicate glass raw materials to add a small amount of light sensitive substances, such as AgCl, AgBr and so on, and add a very small amount of sensitizers, such as CuO, so that glass is more sensitive to light. Optical glass must have high accurate refractive index, Abbe number, high transparency and high uniformity. Optical glass is used in high purity silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium and barium oxide according to a specific formula mixing, high temperature melting in the platinum crucible, using ultrasonic stirring, and then after a long time to bubble; slowly cooling, to avoid glass block stress. The glass block after cooling must be measured by an optical instrument to determine whether the purity, transparency, uniformity, refractive index and dispersion rate conform to the specifications. The qualified glass blocks are heated and forging, and the lens hair of the lens is studied.
Product material: optical quartz glass;
Standard grade: surface finish: 60-40 three grade degree of smoothness; parallelism < 3
Precision grade: surface finish with 10-5 first degree of finish; parallelism < 10 seconds
External diameter tolerance: +0.00mm, -0.20mm; thickness tolerance: + 0.1mm;
Chamfering: 0.25mm X 45 degrees;
Aperture: 90% coating: coating according to the customer demand can be
The total solar radiation transmittance (total solar energy transmittance, solar factor) also known as solar heat gain coefficient (SolarHeat Gaint Cofficent) or (SHGC), also called G. It is defined as the value of glass, doors and windows or glass curtain wall into the indoor heat and solar radiation part is projected onto the glass, windows or glass curtain wall components the solar radiation intensity ratio. The solar radiation part of indoor heat gain is carried out, and the solar radiation is absorbed by the radiation and the solar radiation is absorbed by the components, and then is introduced into the two parts of the indoor heat.
Optical quartz glass using photolithography and ion exchange process, resulting in low loss waveguides, can be prepared by small size intensive light modulation integrated optical ultrafast all optical waveguide devices, provide practical components for the information highway communication network information in large scale data transmission and processing based on fast processing capacity and improve. Nonlinear optical materials and devices have become a microstructure and new type of photonics. The density of optical glass glass density is one of the basic physical properties of users and manufacturers must understand. In addition, the density of the data is required in the calculation of glass molecular volume and molecular refraction. A glass density measuring methods for the solid density of the glass used for discharging liquid weight-loss and Pycnometer method. The molten glass liquid density using platinum ball weight loss determination, heavy weight loss method. The proportion of liquid discharge. Bottle method. If the glass sample in a large number of bubbles; using the method is difficult to obtain accurate results, must be determined by Pycnometer method. Due to the influence of nonlinear optical density on the optical quartz glass, the first glass powder after crushing the bottle filled with the proportion of distilled water or other organic liquids, wells the proportion of bottle into the vacuum chamber pumped glass attached to the surface of the air, and then analysis the balance 51.3 - 4 Glass weighing. The results will close down by the following formula: the density of glass- Lower m - (Lu - 0.0012) +O.OOt2 (1.3-11) F01 ten FN - FN2: O: - glass weight (gram)