This is the OPSQ-10S02-4-5 10 x 10 mm UVFS Square Optical Parallel Flat Window, a high-quality optical component sourced from OptoSigma. The window, which has a base shape of a rectangle, measures 10 x 10 mm and has a thickness of 2 mm.
The window is made from UVFS, a material with the material ID "uvfs mal- 1965". This material is known for its excellent optical properties, making it suitable for a wide range of applications. The window is designed to operate at a wavelength of 588 nm, making it ideal for use in systems that operate in this wavelength range.
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 preferred. However, it's important to note that uncoated windows may not perform as well in high-reflectivity situations as coated windows.
The window is available from OptoSigma and, according to the vendor's website, it is currently in stock. For more information, you can visit the following link: https://www.optosigma.com/us_en/optical-parallels-synthetic-fused-silica-square-a-10-a-20-OPSQ-S.html