Metal-Dielectric Hybrid Cube Beamsplitters

These hybrid cube beamsplitters provide a neutral response across the visible spectrum.  The coating is a combination of a reflecting dielectric film and an absorbing metallic film.  This type of coating is fairly insensitive to polarization producing equal s- and p- reflectance within 5%.  Hybrid cube beamsplitters can provide either a  1:1 or 2:1 split ratio.  They are about 10% absorbing and should only be used for low power applications.  External faces are anti-reflection coated with a broadband visible coating which provides a reflectance of less than 0.5% per face.

Cubes are often easier to use than plate reflectors and they provide protection for the coating, which is internal to the cube.

Split ratios are: T/R = 1:1,  T/R = 2:1

Four separate wavebands are offered: , 400 — 700 nm,  600 — 1000 nm,  900 — 1400 nm,  1200 — 1600 nm.

Standard cube sizes are  5, 6.35, 10, 12.7, 20, 25.4, 38.1 and 50.8 mm but other sizes can be supplied on request.

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