Table 2.

Samples created to validate the proposed technique and the wavelengths at which they were sequentially illuminated using OS1 to generate PAM images and subsequently map the chromophores.

Chromophore targeted	Content sample	${\lambda }_1$ (nm)	${\lambda }_2$ (nm)
Melanin	Human hair	550	650
Hemoglobin	Water and dry hemoglobin (150 g/l)	550	650
Gelatine	Water and gelatine (150 g/l)	1200	1700
Glucose	Water and glucose (150 g/l)	1600	1700
Lipids	Water and chicken adipose fat	1200	1600