US Patent No. 10,924,696

HYPERSPECTRAL IMAGER FOR SNAPSHOT AND LINE-SCAN MODES


Patent No. 10,924,696
Issue Date February 16, 2021
Title Hyperspectral Imager For Snapshot And Line-scan Modes
Inventorship Julien Pichette, Leuven (BE)
Nicolaas Tack, Leuven (BE)
Assignee IMEC VZW, Leuven (BE)

Claim of US Patent No. 10,924,696

1. A method of acquiring an image of an object, said method comprising:acquiring a plurality of frames in a time sequence, each frame being acquired using at least a portion of an array of photo-sensitive areas on at least one sensor surface, which at least one sensor surface is arranged in relation to at least one optical system in an image plane defined by the at least one optical system, wherein the photo-sensitive areas are configured to detect incident light from an object imaged by the at least one optical system onto the image plane, wherein the photo-sensitive areas are arranged in columns and rows of the array and wherein a mosaic filter is associated with the array such that the array is divided into sub-groups of at least five photo-sensitive areas extending across at least two rows and at least two columns of the array, wherein the mosaic filter is configured to transmit at least five different multispectral light properties to the photo-sensitive areas within the sub-group such that each photo-sensitive area within the sub-group is associated with a unique filter portion and wherein the mosaic filter comprises a sequence of unique filter portions associated with a set of photo-sensitive areas along a row of the array such that the filter portions are configured to transmit mutually unique light properties to photo-sensitive areas in the set, wherein the set of photo-sensitive areas extend through more than one sub-group of photo-sensitive areas in the array;
during said time sequence, moving the at least one sensor surface in the image plane in relation to the at least one optical system in a direction extending along rows or columns of the array, wherein the plurality of frames, by said moving, are acquired using different positions of the at least one sensor surface in relation to the at least one optical system for imaging same portions of the object onto different photo-sensitive areas, whereby the plurality of frames acquires different light property information for the same portion of the object and a number of different light properties acquired for the same portion of the object is larger than the number of different light properties transmitted to photo-sensitive areas along a row or column within a sub-group.