WL11050-C15 1in Dia. AR Coated; N-BK7 Broadband Precision Window; t=5 mm 523-532/1047-1064nm

The WL11050-C15 is a high-quality, broadband precision window offered by Thorlabs. This window is designed with a flat profile, featuring a 1-inch (25.4 mm) diameter and a thickness of 5 mm, making it suitable for a wide range of optical applications.

The window is made from N-BK7, a popular glass type in the optical industry, known for its excellent optical properties and high damage threshold. This material, also known as Schott BK7, is a borosilicate crown glass with a low coefficient of thermal expansion, making it resistant to thermal shock.

The WL11050-C15 is coated with a broadband anti-reflective coating, specifically the Thorlabs C155235321047106 coating. This coating is designed to reduce surface reflections and increase transmission across the 523-532 nm and 1047-1064 nm wavelength ranges. The coating is applied to both the front and back surfaces of the window, ensuring optimal performance.

The window is shaped as a thin lens, which is a lens with a very small focal length compared to its diameter. This shape allows for minimal distortion and a wide field of view, making it ideal for imaging applications.