What Does OD Stand For?

OD stands for Optical Density

Optical Density (OD) is a measure of the absorption of light by a medium, quantified as the logarithm of the ratio of incident to transmitted light intensity. It is commonly used in fields such as optics, photometry, and biomedical applications to evaluate the concentration of substances in solutions, assess the performance of optical devices, and characterize materials. Higher optical density values indicate greater absorption of light, which is crucial for determining the properties of materials and solutions in various scientific and industrial contexts.

Other Meanings for OD