220-0402E 38.1 mm Dia. N-BK7 Precision Round Window; t=8 mm Uncoated

The 220-0402E is a precision round window, boasting a diameter of 38.1 mm and a thickness of 8 mm. This window is fabricated from N-BK7, a popular glass type from Schott, known for its excellent optical properties. The window is uncoated, offering users a bare, high-quality optical surface for their applications.

As a flat window, the 220-0402E is designed to provide excellent transmissivity for a wide range of wavelengths. In this case, the window is optimized for a wavelength of 633 nm. This makes it suitable for applications that utilize red light, such as certain types of lasers or optical systems that require minimal chromatic aberration.

The window's geometry is defined by its thin lens shape, which is characterized by its large diameter relative to its thickness. This shape allows the window to minimize optical distortions while maximizing its light-handling capabilities. The window's circular base shape further enhances its versatility, making it a suitable choice for various optical systems that require a circular aperture.

This window is sourced from EKSMA Optics, a reputable vendor known for its high-quality optical components. According to the vendor, the window is currently in stock and available for immediate purchase, as indicated by its valid weblink status.