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Hi all,



 



I am trying to desing an imaging imaging lens for single color, 19:16,  microdisplay.



Got good enough mtf in both geometric and FFT. However, when using the extended scene analysis>>image simulation,  it seems like the mtf is much worse(Checked against the cooke triplet, attched bellow also).



I tried to change the sampling in both the pupil, psf etc. but still get blurry image. 



What am I doing wrong?



Many thanks,



Nadav



 



 





EDIT:



With only one color at the image simulation it's much better. I assume this is the problem?



Hello Nadav,



I believe you are right here with the single wavelength. When RGB is chosen it will propagate three wavelengths at 0.606,0.535 and 0.465 micrometers. Since your system is optimized for 0.589 micrometers it will not propagte these other wavelengths well. We can double check this by looking at the Optical Path difference when we plug in a few extra wavelengths to your system. We can see that the error for 0.465 microns is much higher than the other wavelengths causing chromatic aberration.





Best,



Kaleb



 

Hello Kaleb,



 



Thanks for the detailed answer!



 



Best regards,



Nadav

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