39-266 31.75 mm Dia. AR Coated Sapphire Protective Flat Window; t=1 mm NIR II 750-1550nm

The 39-266 is a 31.75 mm diameter, 1 mm thick flat window made from sapphire, a highly durable and scratch-resistant material. Sapphire, or aluminum oxide (Al2O3), is a popular choice for optical components due to its excellent transparency in the near-infrared (NIR) spectrum, making it ideal for applications in the 750-1550nm range.

This window features an anti-reflective (AR) coating on both the front and back surfaces, specifically designed for the NIR II range. The coating, provided by Edmund Optics, follows their standard curve for optimal performance. This coating reduces surface reflections, enhancing the transmission of light through the window and minimizing losses due to reflection.

The window's thin lens shape and circular geometry make it suitable for a wide range of applications. The item data indicates that it is in stock and available for purchase from Edmund Optics, as confirmed by the valid weblink status.