NPCH-15-6328 15 x 15 mm 50:50 (R:T) N-BK7 Non-polarizing Cube Beamsplitter; t=15mm 632.8nm

The NPCH-15-6328 is a non-polarizing cube beamsplitter offered by OptoSigma, designed for use with a wavelength of 632.8nm. This beamsplitter is a crucial component in various optical systems, particularly those involving laser applications.

The beamsplitter features a robust geometry, with each side measuring 15mm, making it suitable for applications requiring a compact and sturdy optical element. The cube shape ensures stability and durability, while the 15mm x 15mm size provides a reasonable aperture for many laser-based setups.

The NPCH-15-6328 offers a 50:50 reflection-to-transmission ratio, meaning it splits incoming light equally between its reflected and transmitted paths. This characteristic is particularly useful in interferometry and other applications requiring balanced light distribution.

The beamsplitter's material is N-BK7, a high-quality borosilicate glass from Schott. This material is known for its excellent optical properties, including low auto-fluorescence and high damage threshold, making it an ideal choice for laser applications.

The NPCH-15-6328's coatings are another notable feature. Both the front and back surfaces are coated with ideal broadband anti-reflection (AR) coatings, reducing unwanted reflections and increasing transmission. The hypotenuse faces are coated with OptoSigma's proprietary NPCH-6328 coating and ideal broadband AR coating, further enhancing performance.