![]() These mirrors are crafted for various angles of incidence, and offer a stress-minimized and durable solution, especially for applications with high laser power. Furthermore, dielectric mirror coatings provide precise control over transmitted wavelengths. They can reflect up to 99.9% of light while heating up less than their metallic counterparts. When mirrors with even higher reflectivity are needed, we employ dielectric materials. Considering the lower mechanical strength and chemical resistance of metal coatings, it’s beneficial to additionally protect them with a dielectric layer. For the NIR range, chemically resistant gold-coated optical mirrors are preferred. Different metals serve different applications: aluminium provides high reflectivity for UV light, while silver, with its minimal light absorption in the VIS and NIR spectrum, is a go-to for budget-conscious systems. The advantage of metallic mirrors lies in their cost-effectiveness and broad reflectivity, making them suitable for devices such as spectrometers and telescopes. Metallic mirrors achieve around 96% reflectivity, with the remaining light (about 4%) typically absorbed, causing the mirror to heat up under intense light. ![]()
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