Skip to main content
. 2018 Oct 15;18(10):3457. doi: 10.3390/s18103457

Figure 2.

Figure 2

The normalized emitted light intensity spectra, obtained for light emitting diodes (LEDs) with peak wavelengths (λ) of 665 nm, 761 nm, 818 nm and 894 nm, and the extinction coefficient curves of Hb and HbO2, according to Zijlstra’s results.