The high-efficiency fiber optical integrator, designed and patented by m·u·t, is used in our HELIAS system. It is a totally new development enabling customers to perform measurements up to six absorption units without the usually high noise. It opens a new field of absorption and transmission measurements for transmissive samples with high absorption factors.

Optical integrators, for instance integrating spheres, are based on reflection, which reduces the system’s overall sensitivity. The new fiber optical integrator collects the photons directly but not the reflection. About 500 single fibers are aligned in the shape of a sphere and are focused on the sample area to collect the scattered light. All fibers are bundled and can be fed into any spectrometer system. The light efficiency of the fiber-optical integrator compared to a usual integration sphere is 1,000 to 10,000 times higher.

The specimen is placed on top of the HELIAS fiber optical integrator. The measuring table ensures that the light beam of a Xe-light source is always focused perpendicular to the specimen. The HELIAS measuring table integrates this setup into a compact desktop unit.