W-BKS004 12.5 mm Dia. N-BK7 Standard Flat Window; t=3mm Uncoated

The W-BKS004 is a 12.5 mm diameter N-BK7 Standard Flat Window, with a thickness of 3mm, sourced from the reputable optical components vendor, Ross Optical. This window is a type of optical element, specifically designed for use as a flat window, which is a simple optical component that primarily serves to protect the more sensitive elements within an optical system from environmental factors such as dust, dirt, or moisture.

The window is made from N-BK7, a type of glass commonly used in optical applications due to its excellent optical properties. This material, also known as Borosilicate Crown Glass, is known for its low coefficient of thermal expansion, making it resistant to thermal shock. It also has a high Abbe number, which means it has low chromatic dispersion, making it an ideal choice for a wide range of optical applications.

The window has a base shape of a circle, which is the most common shape for flat windows due to its ease of manufacturing and integration into optical systems. The window is uncoated, meaning it does not have any additional layers applied to its surface to alter its optical properties. This can be beneficial in certain applications where the natural properties of the glass are desired.

The window is designed to work at a wavelength of 633 nanometers, which is a common wavelength used in many optical systems. It has a shape described as a thin lens, which indicates its thickness is significantly less than its diameter, making it ideal for use in applications where a flat window is required, but space is limited.