Koninklijke Philips Corporation N.v.

Marcello Balistreri

Derk Jan Wilfred Klunder

Maarten Van Herpen

The invention relates to an optical system that particularly allows an improved detection of signal light propagating from a light source () through a flat glass substrate (). SC-modes of this signal light that would normally be totally internally reflected at the backside () of the substrate () are coupled out by a first diffractive optical element DOE (). To map all signal light leaving the substrate () onto a single target location (), a focusing lens () and a second DOE () are disposed in the optical path behind the substrate (). The DOEs () may for example be a ID sinusoidal grating or a 2D blaze grating. The optical system may particularly be applied in an investigation apparatus for detecting multiple spots of a fluorescent sample material.

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Rosmalen, Netherlands

Marcello Balistreri