20D620ER.4 50.8 mm Dia. Borofloat Economy Broadband Metallic Mirror; t=12.7mm Protected Gold 650-20000nm

This is the 20D620ER.4, a 50.8 mm diameter Borofloat Economy Broadband Metallic Mirror, with a thickness of 12.7mm. The mirror is sourced from the reputable vendor, MKS/Newport.

The mirror is designed with a circular base shape and features a protected gold coating on the front, specifically the new ER.4 coating. This coating is designed to optimize performance within the wavelength range of 650-20000nm.

The mirror is categorized as a Metallic Mirror, which is a type of mirror that utilizes a metal coating to reflect light. This type of mirror is often used in applications where a high reflectivity is required, such as in lasers, interferometers, and other optical systems.

The mirror is also classified as a Thin Lens, indicating that it has a thin, uniform layer of material that bends light as it passes through. This can be beneficial in applications where a precise focus is required.

The mirror is made from Borofloat33, a type of glass that is known for its high thermal resistance and excellent transmission properties. This makes it an ideal choice for use in optical systems that operate in a wide range of temperatures.

According to the vendor's website, the mirror is currently in stock and available for purchase. For more information, please refer to the provided weblink.