I found only one noteworthy idea out of 21 image sensor related applications published this week.
Samsung US20080023624 presents an idea of a drastic reduction of CRA. The proposal is to place a refractive plate, such as fresnel lens, just in front of microlens. It refracts the light in such a way that it comes almost perpendicular to the silicon surface across whole the array, edge to edge. Then the side and corner pixels get essentially same optical conditions as the center ones. No need in metal, microlens and color filter shifts. Neat. I believe fresnel lens is not the best way to implement this. Graded refractive index lens would work better here.
No comments:
Post a Comment
All comments are moderated to avoid spam and personal attacks.