87-684 50 mm Dia. N-BK7 Plano-Convex Spherical Mirror; EFL=50mm Protected Silver 450-10000nm

This 87-684 optical mirror, sourced from Edmund Optics, is a 50mm diameter plano-convex spherical mirror with a protected silver coating. The mirror's base shape is circular, and it features a convex curvature with a radius of 100mm. The mirror's thickness varies from 1.83mm at the edge to 5mm at the center, providing robustness and stability.

The mirror's effective focal length (EFL) is 50mm, making it suitable for a wide range of optical applications. It is designed to operate within the wavelength range of 450-10000nm, covering the visible light spectrum and extending into the near-infrared and infrared regions.

The mirror's material is N-BK7, a high-quality borosilicate glass known for its excellent optical properties. This material is often used in precision optics due to its low coefficient of thermal expansion and high homogeneity.

The front surface of the mirror is coated with a protected silver coating, identified as 'edm dprotsil3001000'. This coating enhances the mirror's reflectivity, particularly within the visible light spectrum, and provides durability, making it resistant to tarnish and corrosion.