45-578 20 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm MgF2 400-700nm

This 45-578 optical window, sourced from Edmund Optics, is a precision protective flat window designed for optimal performance in the visible light spectrum. The window, which features a circular base shape with a diameter of 20 mm and a thickness of 3 mm, is made from N-BK7 glass, a popular choice due to its excellent optical properties and high Abbe number.

The window is coated with MgF2 on both the front and back surfaces, providing broadband anti-reflection properties in the 400-700 nm range. This coating is standard and offers a curve that is widely used in the industry, ensuring high transmission and low reflectance. The MgF2 coating is known for its durability and resistance to environmental conditions, making this window suitable for a wide range of applications.

The window is shaped as a thin lens, which is beneficial for applications where minimal thickness and weight are required. The window's design and construction make it ideal for use in various optical systems, including imaging systems, beam delivery systems, and laser systems.