TECHSPEC® λ/20 First Surface Mirrors
By: Edmund Optics
Edmund Optics® (EO), the premier provider of optical components, introduces its new TECHSPEC® λ/20 First Surface Mirrors, featuring a surface quality of 20-10. They are polished to industry-leading surface accuracy and quality specifications to minimize reflected wavefront error. The coated surface is designed to face the incident light, minimizing energy loss by preventing the light from passing through the glass substrate. TECHSPEC λ/20 First Surface Mirrors are manufactured using a precision fused silica substrate with a low coefficient of thermal expansion, allowing use over a large temperature range. These mirrors are ideally suited for applications that require the mirror to be mounted at a 45° angle, creating a 90° bend in the light path, which is used for a wide variety of precision optics purposes such as beam steering and reflection applications.
TECHSPEC λ/20 First Surface Mirrors use metal coatings with a protective dielectric overcoat layer to prevent damage of the coating from the atmosphere or cleaning. This increases the durability of the metal coating and provides protection from oxidation, with little impact on the coating performance. Enhanced aluminum mirrors use a multi-layer film of dielectrics, which also increases reflectance in the VIS or UV regions. Sixteen new enhanced aluminum models offer >95% average reflectance in the 450 - 650nm wavelength range. Sixteen new protected silver models provide an average reflectance of >98% at 500-800nm and >98% at 2000-10000nm. The protective coating reduces silver's tendency to tarnish for optimal durability and ease of handling. Sixteen new protected gold models provide >96% average reflectivity from 700 - 2000nm and >96% from 2000 - 10000nm for applications requiring high reflectance in the NIR and IR regions. RoHS compliant TECHSPEC ?/20 First Surface Mirrors are available in 48 standard models with diameters from 10mm to 75mm and dimensions from 10 x 10mm to 75 x 75mm.