CM254-250-F01 Dia:1 in Concave Mirror; f=250.0 mm UV-Enhanced Aluminum

The CM254-250-F01 is a concave mirror offered by Thorlabs, a leading vendor in the optical industry. This mirror, with a diameter of 25.4 mm, is designed for use in a variety of optical systems, including beam expanders, interferometers, and laser resonators.

The mirror's concave shape, defined by a radius of curvature (R1) of -500 mm, provides a focal length (EFL) of 250 mm. This means that when light rays are parallel to the mirror's optical axis, they converge at a point 250 mm from the mirror's surface. This property is crucial in focusing and collimating light in optical systems.

The mirror is made from N-BK7 Schott glass, a common material in optical systems due to its high homogeneity, low auto-fluorescence, and excellent transmission properties in the visible and near-infrared regions. The mirror's thickness varies from 6 mm at the center to 6.2 mm at the edge, providing structural rigidity while minimizing weight.

The CM254-250-F01 features a UV-enhanced aluminum coating (Tho F01UVEHAlRefl12) on the front surface. This coating enhances the mirror's reflectivity in the ultraviolet region of the spectrum, making it suitable for applications that involve UV light. The coating's high reflectivity ensures minimal loss of light, thereby improving the efficiency of the optical system.