The SI-W-101.6-6 is a circular, flat window type optical element with a diameter of 101.6 mm and a thickness of 6 mm. This window is sourced from Alkor Technologies, a reputable vendor in the optical industry. The material used in the construction of this window is silicon, specifically identified as "silicon sal vil 1957".
This window is designed to be used as a thin lens, making it suitable for a wide range of optical applications. The wavelength of operation for this window is 633 nm, which is typically used in red laser systems. The window is uncoated, meaning it does not have any additional layers applied to its surface to alter its optical properties.
For more information about this product, including its availability and pricing, please refer to the vendor's website at http://www.alkor.net/Silicon_windows.html.