US 2024/0402084 A1Published application

Measurement of photoluminescence in a droplet

AssigneeAdvanced Nano Technologies Limited

InventorsNorman McMillan, Martina O'Neill, Stephen Smith

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Abstract

A system for measuring the photoluminescence in a droplet provides a source of light for exciting photoluminescence in a liquid, a stop positioned relative to the source so as to define a shadow zone in which excitation light from the source is blocked from direct transmission by the stop, and a sample-receiving region in the shadow zone. A redirection system positioned outside the shadow zone receives excitation light from the source and redirects the light towards the sample-receiving region inside the shadow zone. A detector, which is shielded from the excitation light by the stop, is positioned to receive photoluminescent radiation emanating from a droplet in the sample-receiving region. The redirection system extends around the shadow zone to redirect light into the sample-receiving region from a plurality of converging directions. This maximizes the illumination of the drop while shielding the detector from direct illumination from the source.

Claims38

Dependent claims

A system for measuring photoluminescence in a droplet, comprising:

a source of light for exciting photoluminescence in a liquid, said source being located at a first position;
a stop positioned relative to said source so as to define a shadow zone in which light of at least one wavelength emanating from said source is blocked from direct transmission by the stop, said shadow zone including a sample-receiving region;
a redirection system comprising at least one redirecting element positioned outside said shadow zone, wherein said at least one redirecting element is adapted to receive light from said source and to redirect said received light towards the sample-receiving region inside said shadow zone;
and
a detector receiving, at a second position, photoluminescent radiation emanating from the sample-receiving region;
and
wherein said redirection system extends around said shadow zone to redirect light into the sample-receiving region from a plurality of converging directions, such that the sample-receiving region receives light from said plurality of converging directions.

4 more elements

Dependencies are inferred from the claim text.