Optical densitometry

Optical densitometry is a technique used to measure how much light is absorbed or transmitted by a sample, typically to assess transparency or density. In practice, a light source passes through the sample, and a sensor detects the amount of light that makes it through. The more light absorbed, the higher the optical density, indicating a denser or more opaque material. This method is common in fields like photography, medical imaging, and laboratory analysis to quantify changes in material properties, such as the concentration of a substance or the quality of a visual medium.