Paraytec Limited

Authentix, Inc.

David Goodall

Kevin James Moon

Edmund Thomas Bergstrom

Ian Eastwood

Erwin Dorland

Edmund Bergström

Alexander Chapman

James Hershell Lenke

Mohammed Salem Al-Jafari

Nigel Martin Allinson

The present invention relates to a method of (and system for) characterizing the permeation of a permeant of interest between a first liquid or semi-solid and a second liquid across an interface (eg through a membrane) by using UV imaging.

Method for determining the permeation of a permeant through a membrane

An optical apparatus and method comprising a light source, an array detector for area imaging and an optical cell assembly. The optical cell assembly comprises a chamber which is arranged to receive a sample of a material including an analyte, a fluid inlet and a fluid outlet coupled to the chamber. A fluid dissolution medium stream passes through the chamber such that the sample can dissolve into the dissolution medium. The chamber is in at least one light path created between the light source and the array detector. The array detector comprises a two dimensional array of detector locations arranged to provide an output signal indicative of the light absorbance of the analyte within the chamber such that the output of the array detector is indicative of the concentration profile of the analyte near the surface of the sample.

Optical assembly and method

The present invention relates to an apparatus and methods for the identification or authentication of liquid products by the addition of an anti-Stokes marker. The invention features an apparatus and method for the identification of a liquid, dynamic or static, that includes adding an anti-Stokes luminescent marker compound to the liquid followed by exposing the compound to a light source of a known wavelength or known wavelengths and then detecting one or more shorter wavelength emissions from the marker, where the identity of the liquid is confirmed by the emission wavelength or wavelengths that are detected and quantified. The irradiating source of light includes, but is not limited to, a laser and other conventional light sources.

Method and apparatus for monitoring liquid for the presence of an additive

An optical assembly comprising a light source, at least one sample vessel and a detector. The detector comprises a plurality of detector locations and the vessel comprises a wall and core of relative shape and dimensions adapted to contain a sample for detection and to define at least two spatially separated transmitted light paths, a first wall path which enters and exits the vessel walls only, spatially separated from a second core path which enters and exits the vessel walls and additionally the vessel core. The spatially separated wall and core paths are coupled to individual detector locations on the detector, a module or clip-on device therefor. Methods for detection and uses of the optical assembly are also disclosed.

Optical assembly and method for detection of light transmission

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York, United Kingdom

David Goodall