63-204 20 mm Dia. UVFS Round Protective Flat Window; t=2 mm Uncoated

The 63-204 is a 20 mm diameter, 2 mm thick uncoated flat window made from UVFS material, sourced from Edmund Optics. This window is a type of optical element designed to protect other optical components from environmental hazards such as dust, dirt, and moisture, while minimally affecting the light path.

The window's base shape is circular, which is a common shape for optical elements due to its symmetry and ease of integration into various optical systems. The geometry of the window includes a diameter of 20 mm and a thickness of 2 mm, making it a thin and lightweight component suitable for applications where space and weight are critical factors.

The material of the window is UVFS, which is a type of fused silica. Fused silica is known for its excellent optical properties, including a low coefficient of thermal expansion, high thermal shock resistance, and high transmittance across a wide range of wavelengths. The UVFS material specifically is designed for use in the ultraviolet region of the spectrum, making it ideal for applications in UV spectroscopy, UV curing, and other UV-based technologies.

The window is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This can be advantageous in some applications where the reflectance of the window surfaces is not a concern, or where the cost of additional coatings is prohibitive. However, it should be noted that uncoated windows can have higher reflectance than coated windows, which can lead to losses in optical power and reduced system performance.