43-464 25 mm Dia. N-BK7 Concave-Convex Spherical Mirror; EFL=10mm Protected Aluminum 400-2000nm

This 25 mm diameter concave mirror, sourced from Edmund Optics, boasts an effective focal length (EFL) of 10mm, making it suitable for a wide range of optical applications. The mirror's base shape is circular, and it features a protected aluminum coating that offers high reflectivity across the 400-2000nm wavelength range.

The mirror's geometry is spherical, with both radii of curvature (r1 and r2) measuring -20mm. This curvature, combined with its concave shape, allows for precise focusing and reflection of light. The mirror has a thickness of 3mm at the edge, providing sufficient structural integrity for most applications.

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

The mirror's coating, identified as "edm protal452008000", is a protected aluminum coating. This type of coating is highly reflective and durable, making it ideal for use in demanding optical environments. The protection layer ensures that the aluminum coating remains intact, even in the presence of minor surface scratches or contaminants.