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Abstract

A device for different applications of measuring properties of samples on e.g. microtitration plates and corresponding sample supports. It achieves more efficient illumination for activating a sample in measuring e.g. fluorescence. This is achieved by providing an illumination arrangement in an optical measurement instrumentation which includes at least one cavity which has walls with reflective inner surfaces. The light beams for the excitation of samples are guided through the cavity. With such a cavity it is possible to collect the radiation of the light source efficiently and guide the light into the sample with very small attenuation. The reflections from the cavity walls significantly improve the evenness of the radiation. This effect can be further increased by providing an uneven inner surface of the walls. It is also possible to collimate the light by using a cavity which has an increasing width/cross-section in the advancing direction of the light.

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First Claim