Polarized Light Examination and Photography of the Skin

摘要: • Light reflected from skin has two components: regular reflectance, or "glare" arising the surface, and light backscattered within tissue. The reflectance contains visual cues related to surface texture, whereas component pigmentation, erythema, infiltrates, vessels, other intracutaneous structures. Unlike component, preserves plane of polarization polarized incident light. Thus, viewing through a linear polarizer, under linearly illumination, separates components tissue reflectance. Thirty patients were examined photographed in this manner. When planes are parallel, images with enhanced detail obtained. orthogonal, wrinkles disappear, an view vasculature pigmented lesions is Simple, clinically useful techniques presented. ( Arch Dermatol. 1991;127:1000-1005)