NPCH-15-4050 15 x 15 mm 50:50 (R:T) N-BK7 Non-polarizing Cube Beamsplitter; t=15mm 405nm

The NPCH-15-4050 is a non-polarizing cube beamsplitter offered by OptoSigma, designed for use in optical systems that require beam splitting at a 50:50 ratio. This beamsplitter is specifically designed for a wavelength of 405nm and features a 15mm x 15mm aperture, making it suitable for a wide range of applications.

The beamsplitter is constructed from N-BK7 glass, a popular material in optical systems due to its excellent optical properties and high damage threshold. The geometry of the beamsplitter is a cube, with each side measuring 15mm, providing a robust and compact design.

The coating on the beamsplitter is an ideal broadband anti-reflection (AR) coating on all surfaces, except for the hypotenuse faces. The front, back, left, and right faces are coated with an ideal broadband AR coating to minimize reflection and increase transmission. The hypotenuse faces, however, are coated with an Opt NPCH-4050 coating on one face and an ideal broadband AR coating on the other. This specific coating configuration ensures optimal performance at the specified 405nm wavelength.

The beamsplitter's physical data indicates a reflection of 0.5 and a transmission of 0.5 at the 405nm wavelength, confirming its 50:50 beam splitting ratio. This beamsplitter is available for purchase directly from the OptoSigma website, where it is currently in stock.