Optical sensor having apertures
Systems and methods for optical imaging are disclosed. An optical sensor includes: an image sensor array comprising a plurality of pixels; and a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels in the plurality of pixels, and wherein the multiple light collimating apertures are disposed over different portions of the photosensitive area of the one of the pixels.
1. An optical sensor, comprising:
an image sensor array comprising a plurality of pixels; and
a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels in the plurality of pixels, and wherein the multiple light collimating apertures are disposed over different portions of the photosensitive area of the one of the pixels,
wherein the image sensor array comprises a plurality of photodiodes formed on a glass thin film transistor substrate, wherein the photosensitive area of one of the plurality of pixels corresponds to a single one of the photodiodes.
2. The optical sensor of claim 1 , wherein the multiple light collimating apertures are arranged in a hexagonal packing arrangement.
3. The optical sensor of claim 1 , wherein the multiple light collimating apertures are arranged in a square packing arrangement.
4. An optical sensor, comprising:
an image sensor array comprising a plurality of pixels; and
a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and a light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels of the plurality of pixels;
wherein the plurality of light collimating apertures includes an array of clusters of light collimating apertures, each cluster including multiple light collimating apertures disposed within a photosensitive area of a respective single one of the pixels of the plurality of pixels;
wherein the pixels of the plurality of pixels are arranged in a square array, wherein the array of clusters is arranged in a square array corresponding to the plurality of pixels, and wherein the multiple light collimating apertures in each of the clusters are arranged in a square packing arrangement,
wherein a row of light collimating apertures in the square packing arrangement is rotated 45 degrees relative to a row of pixels in the square array.
5. The optical sensor of claim 4 , wherein the spacing between adjacent apertures in at least one of the clusters is irregular and is shifted by a random amount.
6. An optical sensor, comprising:
an image sensor array comprising a plurality of pixels, and
a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and a light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels of the plurality of pixels;
wherein the plurality of light collimating apertures includes an array of clusters of light collimating apertures, each cluster including multiple light collimating apertures disposed within a photosensitive area of a respective single one of the pixels of the plurality of pixels;
wherein the pixels of the plurality of pixels are arranged in a square array, wherein the array of clusters is arranged in a square array corresponding to the plurality of pixels, and wherein the multiple light collimating apertures in each of the clusters are arranged in a square packing arrangement,
wherein a spacing between adjacent apertures in one of the clusters is less than a spacing between adjacent apertures from a neighboring pair of the clusters.