NPCH-20-13000 20 x 20 mm 50:50 (R:T) N-BK7 Non-polarizing Cube Beamsplitter; t=20mm 1300nm

The NPCH-20-13000 is a non-polarizing cube beamsplitter from OptoSigma, designed for use in optical systems that require beam splitting at a 50:50 ratio. This beamsplitter is specifically designed for use with a 1300nm wavelength, making it suitable for applications in the near-infrared spectrum.

The beamsplitter is constructed from N-BK7 glass, a popular material for optical components due to its excellent optical properties and high damage threshold. The geometry of the beamsplitter is a perfect cube, with each side measuring 20mm, providing a compact and robust design.

The beamsplitter features ideal broadband anti-reflection coatings on all surfaces, including the hypotenuse faces, reducing unwanted reflections and increasing transmission. The hypotenuse faces are coated with an OptoSigma-specific coating, designated as 'opt npch-13000', further enhancing the performance at the specified 1300nm wavelength.

The beamsplitter's performance is characterized by a 50:50 split ratio for both reflection and transmission, ensuring equal distribution of light between the reflected and transmitted beams. This makes it an ideal choice for applications that require balanced beam splitting, such as interferometry, optical testing, and imaging systems.