densitetsplotter

A densitometer is an instrument used to measure the optical density of a substance. Optical density, also known as absorbance, is a measure of how much light is absorbed by a sample. This is often used in fields like photography, printing, and medical diagnostics. In photography and printing, a densitometer is used to measure the density of photographic film or paper, ensuring consistent color and exposure. This allows for precise reproduction of images and gradients. In medical applications, densitometers can be used to analyze the density of blood or other biological samples, aiding in diagnosis. The measurement is typically based on the Beer-Lambert law, which relates the attenuation of light to the properties of the material through which the light is traveling. Densitometers come in various forms, including transmission densitometers, which measure how much light passes through a sample, and reflection densitometers, which measure how much light is reflected from a surface. The readings from a densitometer are usually expressed in logarithmic units.