Plano-Concave Lenses

Dimensions (L×H×T): L=20mm, H=20mm, T=10mm Reflection Accuracy: ≤5 arc seconds Material: Optical glass

Corner Cube Retroreflectors are optical devices designed to reflect light back to its source with minimal scattering, ensuring high precision in optical systems.

Material: Germanium (Ge) Shape: Round Transmission Range: 2-16μm

The product shown is a circular, dark-gray metallic optical element, which is consistent with the appearance of a germanium (Ge) infrared optical window. Germanium windows are opaque in the visible band but offer excellent transmission in the mid-wave and long-wave infrared ranges, making them widely used as protective windows in thermal imaging cameras, infrared sensors, and IR spectroscopy systems. The product appears to be an unmounted round window with precision-polished surfaces, and it can typically be supplied with anti-reflection (AR) or diamond-like carbon (DLC) coatings optimized for the 8-12μm thermal imaging band.

Purity: ≥99.9999%(6N) Donor Impurity Content (P, As, Sb): ≤0.5ppba Acceptor Impurity Content (B, Al): ≤0.3ppba

Polycrystalline Silicon Chunks are high-purity silicon raw materials featuring a silvery-gray metallic luster and irregular fractured chunk morphology. Produced through refined chemical purification and deposition processes, the material achieves purity levels of 6N (99.9999%) and above, with strictly controlled donor, acceptor, carbon and metallic impurity contents. It serves as the essential feedstock for single crystal silicon ingot growth, semiconductor wafer manufacturing, solar photovoltaic production and the fabrication of infrared optical components such as silicon lenses and windows.

Appearance: White crystalline granules Color: White Form: Granular / Crystalline powder

The product shown is a white crystalline granular material, identified as high purity quartz sand (optical grade silica raw material). It features uniform particle distribution, bright white color, and high chemical purity. As a fundamental raw material in the optoelectronic industry, it is widely used for producing fused silica glass, optical fiber preforms, quartz glass components, optical lenses, and semiconductor-grade quartz products. Its low impurity content ensures excellent optical transparency, high thermal stability, and low thermal expansion in the finished optical components.

SiC Content: ≥98.5% Free Carbon (F.C) Content: ≤0.2% Fe2O3 Content: ≤0.15%

Black Silicon Carbide Abrasive Grains are sharp, angular black crystalline particles with a slight metallic luster, produced by smelting quartz sand and petroleum coke at high temperature in an electric resistance furnace. With a Mohs hardness of about 9.2, second only to diamond and boron carbide, and excellent cutting ability, thermal stability and chemical inertness, this material is widely used in the photonics and optics industry for grinding, lapping and polishing of optical glass, lenses, prisms, crystals and semiconductor wafers, as well as for manufacturing bonded and coated abrasive tools.