63-209 40 mm Dia. Calcium Fluoride Protective Flat Window; t=3 mm Uncoated

The 63-209 is a 40 mm diameter Calcium Fluoride (CaF2) protective flat window, with a thickness of 3 mm and no coating. This window is sourced from Edmund Optics, a reputable vendor in the optical industry.

The window is designed as a flat window, which is a type of optical window that does not alter the path of light. It is circular in base shape, making it suitable for a wide range of applications. The window's diameter is 40 mm, providing a substantial aperture for light to pass through. The thickness of the window is 3 mm, offering a good balance between strength and light transmission.

The window is made of Calcium Fluoride, a material with a high transmission range from the ultraviolet to the infrared. The material ID for this window is "caf2 mal-1963", indicating its specific type and properties. The window is designed to operate at a wavelength of 587.6 nm, which is in the visible light spectrum.

The window is uncoated, meaning it does not have any additional layers applied to its surface. This can be beneficial in certain applications where a natural surface is required or where additional layers could interfere with the light path.