48-420 75.0 x 75.0 mm B270 Glass Protective Flat Window; t=3 mm MgF2 400-700nm

The 48-420 is a high-quality glass protective flat window, measuring 75.0 x 75.0 mm, sourced from the renowned optical components vendor, Edmund Optics. This window is designed to protect optical surfaces from damage, while maintaining excellent optical quality.

The window is made from B270 glass, a popular choice in the optical industry due to its excellent optical properties and durability. The glass has a thickness of 3 mm, providing a good balance between strength and weight.

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 400-700nm wavelength range, reducing reflection and increasing transmission. The coating is also hardened to resist scratching and abrasion, ensuring the window maintains its optical performance over time.

The window is shaped as a thin lens, which is a type of lens where the thickness of the lens is much less than the diameter of the lens. This shape is often used in optical systems where a flat window is required, but a lens shape provides additional functionality.