Multispectral imaging device with array of microlenses
AssigneeSilios Technologies
InventorsStephane Tisserand, Laurent Roux, Marc Hubert, Vincent Sauget, Aurelien Faiola
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Abstract
The invention relates to a multispectral imaging device including: a photosensitive detector DET made up of a matrix of pixels; an array of microlenses ML1, ML2, ML3 reproducing the matrix of pixels; and a filter module MF formed by a matrix of individual filters λ1, λ2, λ3 reproducing the matrix of pixels. The device is remarkable in that the array of microlenses is arranged directly in contact with the detector DET, and the filter module MF is made on a substrate SS that is put into contact with the array of microlenses.
Claims9
A multispectral imaging device comprising:
- a photosensitive detector made up of a matrix of pixels formed on a first substrate, each pixel comprising a photosensitive zone;
- an array of microlenses, each of the microlenses overlapping one corresponding pixel of the matrix of pixels, each of the microlenses configured for focusing incident light on a photosensitive zone of the corresponding pixel, each lens being a plano-convex lens with a flat side facing the photosensitive detector;
- and
- a filter module formed by a matrix of individual filters each facing one pixel of the matrix of pixels;
- wherein the filter module comprises a bidimensional matrix of at least four generally identical filter cells, each of the filter cells having at least two of the individual filters;
- wherein the filter module is formed on a second substrate and faces said array of microlenses, with one of the individual filters in direct contact with a convex side of a corresponding one of the microlenses;
- and
- said filter module is adhesively bonded to said detector by adhesive located at an outside edge of the filter module, so that there is no adhesive between the filter module and the photosensitive zones of the photosensitive detector.
Dependencies are inferred from the claim text.