WHF4000-AU1 40 mm Dia. UVFS Round Window; t=3mm AR 248-400nm

The WHF4000-AU1 is a 40 mm diameter UVFS (UltraViolet Fused Silica) round window with a thickness of 3mm, featuring Anti-Reflective (AR) coating for the UV range of 248-400nm. This window is sourced from Knight Optical, a reputable vendor known for its high-quality optical components.

This window is classified as a Flat Window, which is a type of optical window designed to provide a clear aperture without introducing any optical power. The Flat Window's primary function is to protect the optical system from environmental contaminants while maintaining the optical path's integrity.

The window's Base Shape is circular, making it suitable for applications requiring a circular field of view. The geometry specifies a diameter of 40mm and a thickness of 3mm, ensuring robustness and minimal distortion.

The window is made of UVFS material, which is known for its excellent transparency in the UV region. This material is also highly resistant to thermal shock and has a low coefficient of thermal expansion, making it an ideal choice for applications involving extreme temperatures.

The window features a coating on both the front and back surfaces. The coating is Knight Optical's AU1, an Anti-Reflective coating designed to reduce surface reflections and increase transmission in the UV range of 248-400nm. This coating ensures optimal performance in UV applications.

The window's shape is defined as a Thin Lens, indicating that it has minimal optical power and is primarily used for protective or windowing purposes. This shape further enhances the window's suitability for UV applications.