47-839 40 mm Dia. UVFS Round Protective Flat Window; t=4 mm VIS 0 425-675nm

The 47-839 is a 40 mm diameter, 4 mm thick flat window made from UVFS material, specifically UVFS Mal-1965. This window is designed for use in the visible spectrum, with a central wavelength of 587.6 nm. The window is coated on both the front and back surfaces with an EDM Vis-0 standard curve coating, which provides excellent transmission characteristics and protection against environmental factors.

The window's geometry is defined by its 40 mm diameter and 4 mm thickness, making it suitable for a wide range of optical applications. The flat shape of the window ensures minimal distortion and maintains the integrity of the light path. The window is classified as a thin lens, indicating its minimal curvature and focusing power.

This window is sourced from Edmund Optics and is currently in stock. The product's webpage provides more detailed information, including technical specifications and purchasing options. The window's robust design, high-quality coating, and compatibility with the visible spectrum make it a versatile and reliable choice for various optical applications.