39-394 25.4 mm Dia. Zinc Selenide Protective Flat Window; t=1 mm Uncoated

The 39-394 is a 25.4 mm diameter Zinc Selenide (ZnSe) protective flat window, with a thickness of 1 mm and no coating. This window, sourced from Edmund Optics, is a type of flat window, characterized by its base shape of a circle. The window is designed to protect optical systems from environmental hazards while minimally affecting the light path.

Zinc Selenide is a popular material for optical components due to its excellent transmission properties in the infrared region of the spectrum. This particular window has a wavelength of 587.6 nm, which falls within the visible light spectrum. The window's geometry, including its diameter and thickness, are precisely engineered to ensure optimal performance.

The window's shape is that of a thin lens, which is designed to reduce weight and thickness while maintaining the optical performance of a standard lens. This makes it an ideal choice for applications where space and weight are critical factors.

The window is uncoated, meaning it does not have any additional layers applied to its surface. While coatings can enhance the performance of optical components, an uncoated window can be advantageous in certain applications due to its simplicity, cost-effectiveness, and minimal impact on the light path.