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This page discusses issues related to running broadband CMOS image sensor simulations. Typical users will follow these steps as they move from single wavelength simulations to broadband simulations:

1.Initially, run simulations at 3 different wavelengths to collect data for red, green and blue illumination.

2.Increase the bandwidth of the 3 simulations to collect light over a range of wavelengths associated with red, green and blue.

3.Eventually, it may be possible to simulate the entire spectrum in a single simulation.


The example simulations described in the previous pages used the initial approach and collected data at only one wavelength. Collecting results at more than a few wavelengths in this manner would be slow, since the entire set of simulations must be re-run at each frequency of interest. A better approach is to collect broadband (multiple frequencies) results from a single simulation, and this capability is a key advantage of using a time domain simulation method like FDTD. However, there are some complications related to broadband simulations that must be considered and this section explains how to address them.


See also

CMOS image sensors

Initial simulation

Broadband injection angles

Bloch BCs in broadband sweeps

Modify material fits

Related publications

Crocherie et al., “Three-dimensional broadband FDTD optical simulations of CMOS image sensor”, Optical Design and Engineering III, Proc. of SPIE, 7100, 71002J (2008)







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