66-194 12.5 mm Dia. N-BK7 Ultra-Thin Protective Flat Window; t=0.2 mm MgF2 400-700nm

This product is a 12.5 mm diameter N-BK7 ultra-thin protective flat window, offered by the renowned optical components vendor, Edmund Optics. The window is characterized by its minimal thickness of 0.2 mm, making it an ideal choice for applications requiring lightweight and compact optical components.

The window is made from N-BK7, a popular borosilicate crown glass known for its excellent optical properties, including a high Abbe number and low dispersion. This material is often used in high-precision optical systems due to its superior homogeneity and excellent transmittance across a wide spectrum.

The window features a standard MgF2 coating on both the front and back surfaces. This coating is designed to enhance the window's performance in the 400-700 nm wavelength range, providing improved transmission and reduced reflection. The MgF2 coating is known for its durability and resistance to environmental factors, making it suitable for use in various applications.

The window's geometry is that of a thin lens, which can be beneficial in certain optical systems where a flat window may cause unwanted reflections or where a lens-like component is required. Despite its thinness, the window maintains the excellent optical properties of N-BK7, ensuring high-quality performance.