Hanlon Katharine L
a Division of Media Services , Mayo Clinic Florida , Jacksonville , FL , USA.
b Division of Pediatric Dermatology , Cincinnati Children's Hospital Medical Center , Cincinnati , OH , USA.
J Vis Commun Med. 2018 Jan;41(1):3-8. doi: 10.1080/17453054.2018.1420418. Epub 2018 Jan 10.
Cross-polarisation, with regard to visible light, is a process wherein two polarisers with perpendicular orientation to one another are used on the incident and reflected lights. Under cross-polarised light birefringent structures which are otherwise invisible become apparent. Cross-polarised light eliminates glare and specular highlights, allowing for an unobstructed view of subsurface pathology. Parallel-polarisation occurs when the polarisers are rotated to the same orientation. When cross- or parallel-polarisation is applied to photography, images can be generated which aid in visualisation of surface and subsurface elements. Improved access to equipment and education has the potential to benefit practitioners, researchers, investigators and patients.
关于可见光，交叉偏振是一个过程，即在入射光和反射光上使用两个相互垂直取向的偏振器。在交叉偏振光下，原本不可见的双折射结构变得明显。交叉偏振光消除了眩光和镜面高光，从而可以无障碍地观察表面下的病变。当偏振器旋转到相同取向时，就会发生平行偏振。当将交叉或平行偏振应用于摄影时，可以生成有助于观察表面和表面下元素的图像。改善设备获取和教育机会有可能使从业者、研究人员、调查人员和患者受益。
