20Z40DM.8 50.8 mm Dia. Zerodur Laser Line Dielectric Mirror; t=12.7mm 1520-1580nm

This is a 20Z40DM.8 Dielectric Mirror, a high-quality optical component sourced from MKS/Newport. The mirror has a base shape of a circle with a diameter of 50.8 mm, making it suitable for a wide range of optical applications. The mirror's thickness is 12.7 mm, providing sufficient structural integrity while maintaining a low profile.

The mirror is made of Zerodur, a special glass-ceramic material developed by Schott AG. Zerodur is known for its extremely low thermal expansion coefficient, making it an excellent choice for high-precision optical applications that require minimal thermal distortion.

The mirror is designed to operate at a wavelength of 1550 nm, right in the middle of the telecommunications C-band. It features a front coating of New DM.8 AOI 0, a broadband anti-reflection coating that provides high transmission and low reflection across the specified wavelength range.

The mirror's shape is that of a thin lens, which helps to minimize optical aberrations and ensures high-quality imaging. According to the vendor's website, the mirror is currently in stock, indicating that it is readily available for purchase and delivery.