Tag Archives: monochromator

Images for Illustrating Spectrometers

Posted on July 29, 2013 by David Harvey

Several of the posts in the Analytical Image and Video Exchange include schematic diagrams of spectrophotometers. Gathered here are jpeg files for the various components used to create these schematic diagrams. source shutter sample   blank   mirror   grating/monochromator … Continue reading →

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Double-Beam Spectrophotometer

Posted on July 29, 2013 by David Harvey

The illustration below shows a diagram of a scanning, double-beam spectrophotometer. A chopper directs the source’s radiation, using a transparent window to pass radiation to the sample and a mirror to reflect radiation to the blank. The chopper’s opaque surface … Continue reading →

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Single-Beam Spectrophotometer

Posted on July 29, 2013 by David Harvey

The illustration here shows a diagram of a single-beam spectrophotometer that uses a monochromator to select the wavelength. The analyst manually selects the wavelength by adjusting the wavelength dial. Battery-operated, hand-held single-beam spectrophotometers are available, which are easy to transport into … Continue reading →

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Wavelength Selection Using a Monochromator

Posted on July 26, 2013 by David Harvey

An absorption filter has one significant limitation—because a filter has a fixed nominal wavelength, if you need to make measurements at two different wavelengths, then you need to use two different filters. A monochromator provides an alternative method for selecting a … Continue reading →

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