To overcome the limitations of a low fill factor, on certain sensors an array of microlenses is placed on top of the color filter array in order to funnel the photons of a larger area into the smaller area of the light sensitive photodiode.
|Microlens funnels the light of a larger area into the photodiode (indicated in red) of the pixel||Electron microscope image of real microlenses|
This article is written by Vincent Bockaert,
author of The 123 of digital imaging Interactive Learning Suite
Click here to visit 123di.com