49-597 50.8 mm Dia. Borofloat λ/4 Precision Concave Spherical Mirror; EFL=152.4mm Uncoated

This is a 49-597 50.8 mm Dia. Borofloat λ/4 Precision Concave Spherical Mirror, sourced from the reputable optical components vendor, Edmund Optics. The mirror has a diameter of 50.8 mm and a thickness at the edge of 12.7 mm, making it a compact yet robust option for various optical applications.

The mirror's effective focal length (EFL) is 152.4 mm, which is a crucial specification for determining the mirror's curvature and its suitability for specific optical systems. The mirror's concave spherical shape is defined by a radius of curvature (R1) of -304.8 mm, which indicates that the mirror is a converging mirror, bringing light rays to a focus.

The mirror is made of borofloat33, a type of glass known for its high thermal resistance, chemical durability, and excellent transmission properties in the visible spectrum. This makes the mirror suitable for use in environments with varying temperatures and where chemical resistance is a necessity.

Notably, this mirror is uncoated. While coatings can enhance the mirror's performance by increasing its reflectivity or reducing surface scatter, an uncoated mirror can be advantageous in certain applications, such as when broadband anti-reflection is required or when cost is a significant factor.