20131214-DSLR_IMG_0274-Edit.jpg by pwnell, on Flickr
iPhone5s, 40x/0.6, iPhone's own retina screen illumination, HF C
Second shot, the transistors are off and it is only illuminated by the epi-illuminator with polarizers:
20131214-DSLR_IMG_0293-Edit.jpg by pwnell, on Flickr
iPhone5s, 40x/0.6, EPI+POL, HF B
The new iPhone 5s has a dual flash system that tries to better balance the flashes' colour with the ambient light. To do this they most likely changed some phosphor in the tiny flash heads to generate a warmer and cooler flash. Here it is with epi polarization:
20131214-DSLR_IMG_0310.jpg by pwnell, on Flickr
iPhone5s dual flash, 4x, EPI+POL
And for the finale - with auto fluorescence:
20131214-DSLR_IMG_0313.jpg by pwnell, on Flickr
iPhone5s dual flash, 4x, FLUO-C4 (Exc: 330-480µm)
Interesting thing is that these flash heads did not fluoresce at all when the excitation spectrum was 327 - 404µm, implying that it must fluoresce somewhere between 405µm and 480µm.
