TFA-25C05-20 25 mm Dia. N-BK7 Flat Aluminum Mirror λ/20; t=5mm by OptoSigma

The TFA-25C05-20 is a high-quality metallic mirror offered by OptoSigma, a leading vendor in the optical industry. This mirror, with a 25 mm diameter and 5 mm thickness, is designed for use with a wavelength of 588 nm, making it suitable for a wide range of optical applications.

The mirror's base shape is circular, providing a broad, uniform reflective surface. It is made from N-BK7 Schott, a popular optical glass known for its excellent optical properties, including high transparency and low auto-fluorescence. This material ensures the mirror delivers reliable and consistent performance.

The mirror's coating is a crucial component of its design. The front surface is coated with TFA aluminum and protected by a magnesium fluoride (MgF2) layer, which enhances its durability and resistance to environmental factors. This coating provides a reflectivity of 45% at the specified wavelength, making it an ideal choice for applications requiring high reflectivity.

The mirror's geometry is that of a thin lens, which is beneficial in many optical systems due to its minimal thickness and weight. This feature also allows for easy integration into existing setups.