10B20BS.2 25.4 mm Dia. 50:50 (R:T) N-BK7 Broadband Dielectric Plate Beamsplitter; t=6.1mm 700-950nm

This is a 10B20BS.2 Beam Splitter, a high-quality optical component manufactured by MKS/Newport. The beamsplitter boasts a circular geometry with a diameter of 25.4 mm and a thickness of 6.1 mm, making it suitable for a wide range of optical applications.

The beamsplitter is made from n-BK7 Schott, a popular optical material known for its excellent optical properties. This material is particularly suitable for broadband applications, as it exhibits low dispersion and high transmission across a wide spectral range.

The beamsplitter features a broadband coating on both surfaces. The front surface is coated with a new BS.2 coating, while the back surface is coated with a new NC.2 coating. These coatings are designed to provide high reflectivity and high transmission, respectively, across the 700-950 nm wavelength range. Specifically, the beamsplitter offers a 50:50 (R:T) split ratio, meaning it reflects 50% of the incident light and transmits the remaining 50%.

The beamsplitter is designed in the shape of a thin lens, which helps to minimize unwanted optical effects such as aberrations and distortions. This makes it an ideal choice for applications that require high optical precision and accuracy.