"Although organic dye color filters are widely used in color image sensors, such organic dye color filters absorb light in all but one certain wavelength band. Therefore, using such color image sensors may cause a relatively large amount of light energy loss and a low light efficiency."
So, a color separating beam splitter is proposed. The splitter is made of high refractive material diagonal stripe located inside a low refracting material layer:
Apparently, the simulation show quite high efficiency of the proposed color division scheme comparing with the traditional die based CFA:
But it can only work with FSI senor, am I right?
ReplyDeleteBSI version should work too, if FSI one works
DeleteBut if you deposit a thick dielectric layer on BSI sensor, then you will lost the advantage of BSI device. And also HOW can you deposit a thick dielectric layer?
DeleteCan it be organic material, similar to color filters and microlens?
DeleteHow would this proposition likely compare to the latest-gen Foveon sensors in real-world terms?
ReplyDeleteWhich real-world terms you had in mind? Foveon is hardly competetive at anything anyhow.
DeleteThe difference is that in Foveon devices, the color detection is done by three photodiodes arranged in a vertical stack so that all three images are geometrically aligned. The proposed detector still has the color detection elements next to each other as in a regular Bayer array.
DeleteThe Foveon sensor is one of the options for applications where color alignment is essential. The other options for this are prism-based cameras and sequential filtering or sequential illumination.
Foveon sensors are not generally competitive elsewhere primarily because they have low frame rates.
that similar MCS by panasonic
ReplyDelete