Figure 4From: Optical Nerve Detection by Diffuse Reflectance Spectroscopy for Feedback Controlled Oral and Maxillofacial Laser SurgeryPC loading. PC 1 has a consistent contribution of loading along the investigated wavelength range; PC 2 and PC 4 show a higher variation of loading with prominent peaks at 410, 540 and 580 nm; PC 5 and 9 are more disturbed by the influence of noise (not shown in the figure).Back to article page