DU spectrophotometer
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The DU spectrophotometer or Beckman DU, introduced in 1941, was the first commercially viable scientific instrument for measuring the amount of ultraviolet light absorbed by a substance. This model of
DU Spectrophotometer, National Technical Laboratories, 1947
Optical quality quartz crystals
Quartz photoelectric spectrophotometer, Cary & Beckman, 1941
Disassembled absorption cell and photo-tube compartment, Cary & Beckman, 1941
Spectrophotometry
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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. Spectr
DU spectrophotometer
…in 1941, was the first commercially viable scientific instrument for measuring the amount of ultraviolet light absorbed by a substance. This model of spectrophotometer enabled scientists to easily examine and identify a given substance based on its absorption spectrum, the pattern of light absorbed at different…
Table-top spectrophotometer
Beckman IR-1 Spectrophotometer, c. 1941
Hand-held spectrophotometer used in graphic industry
METTLER TOLEDO UV5Nano Micro-Volume Spectrophotometer