Patent ID: 7879598

Claim:
An optical system for luminescence determination, comprising at least two excitation light sources, a sensor platform which comprises a multitude of discrete measurement areas, and an optical component with several discrete facets for deflecting a light beam arranged such that the angle of divergence between excitation light falling onto different facets of said optical component is increased or reduced by at least a factor of 1.2 in the optical path departing from said optical component, in comparison to the original divergence angle between said light rays irradiated onto said different facets, whereby said sensor platform is a planar optical waveguide and said planar optical waveguide comprises a first optically transparent layer on a second optically transparent layer and wherein the second optically transparent layer has a lower refractive index than the first optically transparent layer which comprises at least one first diffractive grating structure modulated therein for in-coupling of excitation light and the sensor platform is characterized by a coupling angle wherein resonance condition for in-coupling into the first optically transparent layer is met.