Densitometer

Heiland Densitometer TRDZ 1

A densitometer is a device that measures the degree of darkness (the optical density) of a photographic or semitransparent material or of a reflecting surface.[1] The densitometer is basically a light source aimed at a photoelectric cell.[2] It determines the density of a sample placed between the light source and the photoelectric cell from differences in the readings.[3] Modern densitometers have the same components, but also have electronic integrated circuitry for better reading.[4]

  1. ^ "301 Medical Densitometer - Black & White Film Measuring". X-Rite. Retrieved 2014-08-23.
  2. ^ "Unbound MEDLINE : An evaluation of a rotating drum densitometer and its application to precession photographs of protein crystal". Unboundmedicine.com. Retrieved 2014-08-23.
  3. ^ Health Physics Division annual progress report. Oak Ridge National Laboratory. Health Physics Division, Union Carbide Corporation, U.S. Atomic Energy Commission, United States. Energy Research and Development Administration, United States. National Bureau of Standards. Fracture and Deformation Division, United States. Dept. of Energy. Office of Fusion Energy, United States. National Bureau of Standards. p. 101. Retrieved 2014-08-23.
  4. ^ Singh, S. K. (2003). Industrial Instrumentation & Control (2nd ed.). Tata McGraw-Hill Education. p. 451. Retrieved 2014-08-23.