45-257 12.5 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm MgF2 400-700nm

This 45-257 optical window, sourced from Edmund Optics, is a high-precision component designed for protective applications. It features a circular base shape with a diameter of 12.5 mm and a thickness of 3 mm, providing a robust and stable platform for optical systems.

The window is made from N-BK7, a popular borosilicate glass known for its excellent optical properties. This material, also known as Schott glass, offers a high refractive index and low dispersion, making it an ideal choice for a wide range of optical applications.

The window is coated with MgF2 on both the front and back surfaces. This coating, standard from Edmund Optics, is designed to provide high transmission in the 400-700 nm range, making it suitable for use in visible light applications. The coating is also known for its durability and resistance to environmental factors, ensuring long-lasting performance.

The window is shaped as a thin lens, which is a type of lens with a small thickness compared to its diameter. This shape allows for minimal distortion and scattering of light, contributing to the high-quality performance of the window.