Abstract: Embodiments of the present invention provide a hyperspectral endoscope system, comprising a memory for storing data therein, an endoscope arranged to, in use, receive radiation reflected from a sample and to output wide-field image data and line-scan hyperspectral data corresponding to the sample, a processor coupled to the memory, wherein the processor is arranged, in use, to determine registration information between portions of the wide-field image data, and determine wide-area hyperspectral image data in dependence on the registration information and the line-scan hyperspectral data.

Abstract: A method is provided of producing an optical filter. The method comprises depositing a first mirror layer onto a substrate; depositing an insulating layer on the first mirror; exposing at least some of a plurality of portions of a surface of the insulating layer to a dose of energy; developing the insulating layer in order to remove a volume from the at least some of the plurality of portions of the insulating layer, wherein the volume of the insulating layer removed from each portion is related to the dose of energy exposed to each portion, and wherein a remaining thickness after the removal of the volume from each portion of the insulating layer is related to the dose of energy exposed to each portion. The method further comprises depositing a second mirror layer on the remaining thickness of each of the plurality of portions of the insulating layer.