Optical materials must meet specific criteria, such as high visible light transmission and the absence of selective absorption that could lead to coloration. These properties are crucial for maintaining clarity and accuracy in optical applications. Based on the Abbe number, optical glasses are typically divided into two main categories: crown glass (enamel) and flint glass. Crown glass has a lower refractive index and higher Abbe number, making it less dispersive, while flint glass has a higher refractive index and lower Abbe number, leading to more dispersion.
The classification of optical glass also depends on its refractive index, with different types arranged in order of increasing refractive index. This categorization helps in selecting the right material for specific optical components. Optical glass is widely used in lenses, prisms, and mirrors for various precision instruments, including telescopes, microscopes, cameras, and other optical devices. Its performance directly affects the quality of image formation and the overall functionality of these systems.
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Co-extrusion polyolefin elastomers (POE) abrasion resistant inner layer plastic composite pipes is characterised by taking co-extrusion thermoplastic polyolefin elastomers as the abrasion resistant inner layer, using a combination of steel wires (or glass fiber) reinforcements and high-density polyethylene. In addition to good workability and physical and mechanical properties as HDPE pipes, such pipes have good wear resisting performance. Co-extrusion abrasion resistant composite pipeline is a kind of anti-abrasion pipe with high cost-effective performance.
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