Figure 2.

The applied system’s spectrum for blood PBM consists of a halogen reflector and a broadband NIR filter. The transmission of electromagnetic radiation in this system starts with a rising slope, which begins at approx. 700 nm. Then, two bands can be distinguished—the first, wide, with a maximum intensity of 800 nm, and the second, of low intensity, with a maximum of 960 nm. The radiation intensity consisted of 86% of the NIR spectral range waves, while 14% were electromagnetic waves from the red light range.