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Spectrophotometry

Table-top spectrophotometer
Beckman IR-1 Spectrophotometer, ca. 1941
Beckman Model DB Spectrophotometer (a double beam model), 1960
Hand-held spectrophotometer used in graphic industry[1]

Spectrophotometry is a branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength.[2] Spectrophotometry uses photometers, known as spectrophotometers, that can measure the intensity of a light beam at different wavelengths. Although spectrophotometry is most commonly applied to ultraviolet, visible, and infrared radiation, modern spectrophotometers can interrogate wide swaths of the electromagnetic spectrum, including x-ray, ultraviolet, visible, infrared, and/or microwave wavelengths.

  1. ^ ISO 12647-2: Graphic technology — Process control for the production of halftone colour separations, proof and production prints — Part 2: Offset lithographic processes. Geneva: International Organization for Standardization. 2013. p. 13.
  2. ^ Allen, DW; Cooksey, C; Tsai, BK (Nov 13, 2009). "Spectrophotometry". NIST. Retrieved Dec 23, 2018.