Flat mirror,concave mirror,convex mirror,hot mirror,cold mirror,laser mirror,dielectric mirror,metal coated HR mirror,hyperbolical mirror etc.. Specifications of our mirror as follow: *Material:BK7 A glass, Quartz, CaF2,crystals or others *Clear Apenture:90% *Squares/Rectangles:1mm to110mm+/-0.2mm *Center thickness tolerance:+/-0.1mm *Surface quality:60-40 to 20/10 Scratch/Dig *Surface flatness:lambda/10 at 632.8nm *Parallelism:1 Arc min Mirror is a smooth,highly polished surface covered a thin coating.Mirror is usually a thin coating of metal or dielectrics. VY Optics designs and manufactures a great choice of various high and partially reflecting mirrors for the spectral range:UV,visible,near infrared,and infrared regions.Metallic coatings are more broadband while dielectric coatings are more efficient. Selecting the proper mirror for your application requires making a number of choices.A few of the many considerations include:Reflectivity,Laser Damage Resistance, Coating Durability,Thermal Expansion of the substrate,Wavefront Distortion,Scattered Light,and certainly Cost.