The lamina lucida is a component of the basement membrane which is found between the epithelium and underlying connective tissue (eg.epidermis and dermis of the skin). It is a roughly 40 nanometre wide electron-lucent zone between the plasma membrane of the basal cells and the (electron-dense) lamina densa

Lamina densa

The lamina densa is a component of the basement membrane zone between the epidermis and dermis of the skin, and is an electron-dense zone between the lamina lucida and dermis, synthesized by the basal cells of the epidermis, and composed of type IV collagen, anchoring fibrils made of type VII...

of the basement membrane.

Similarly, electron-lucent and electron-dense zones can be seen between enamel of teeth and the junctional epithelium. The electron-lucent zone is adjacent to the cells of the junctional epithelium and might be considered a continuation of the lamina lucida as both are seen to harbour hemidesmosomes. However, unlike the lamina densa, the electron-dense zone adjacent to enamel show no signs of hemidesmosomes.