PW4037C 4 in Dia. N-BK7 Round Plane Optical Window; t=0.375 in Uncoated

The PW4037C is a 4-inch diameter, flat window optical component made of N-BK7 glass, a popular material for its excellent optical properties and wide transmission range. This window, sourced from Laser Components, has a thickness of 0.375 inches and a clear aperture of 101.6 mm, making it suitable for various optical applications.

The N-BK7 glass, also known as Borosilicate Crown, is known for its low coefficient of thermal expansion and high transmittance in the visible and near-infrared regions, making it an ideal choice for applications that require high precision and durability.

The window features a flat, plano surface on both sides, which is essential for applications that require minimal optical distortion. The uncoated version of this window provides excellent chemical resistance and durability, making it suitable for harsh environments.

For more technical details, you can refer to the datasheet provided by Laser Components at https://www.lasercomponents.com/fileadmin/user_upload/home/Datasheets/lc-optics/substrates/round_plano_substrates.pdf. The datasheet also provides information about the stock availability of the product.