68-399 12.5 mm Dia. 60:40 (R:T) N-BK7 Plate Beamsplitter; t=3mm VIS 400-700nm

The 68-399 is a high-quality beam splitter from Edmund Optics, designed for use in the visible light spectrum, specifically between 400 and 700nm. This beam splitter features a circular geometry with a diameter of 12.5mm and a thickness of 3mm, making it suitable for a wide range of optical applications.

The beam splitter is made from N-BK7, a popular optical glass due to its excellent optical properties and high Abbe number. This material ensures high transmittance and low dispersion, making it ideal for applications that require precise optical performance.

The 68-399 features a 60:40 (R:T) split ratio, meaning that approximately 60% of the incident light is reflected, while 40% is transmitted. This ratio is consistent across the visible light spectrum, providing a reliable and predictable performance.

The front surface of the beam splitter is coated with the EDM 68-399 coating, which is specifically designed to enhance the performance of the beam splitter in the visible light spectrum. This coating ensures high transmittance and low reflectance, contributing to the overall efficiency and performance of the optical system.