Tag Archives: instrument

FT-IR Spectrometer

The illustration below shows an FT-IR spectrometer equipped with a diamond ATR sample cell. The inserts show a close-up photo of the sample platform, a sketch of the ATR’s sample slot, and a schematic diagram showing how the source’s radiation … Continue reading

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Images for Illustrating Spectrometers

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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Diode Array Spectrometer

The illustration here shows a schematic diagram of a diode array spectrophotometer, in which we replace a single photomultiplier detector with an array of photodiodes. The source radiation passes through the sample and is dispersed by a grating. The photodiode array is … Continue reading

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Double-Beam Spectrophotometer

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

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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Filter Photometer

The illustration below is a diagram of a simple filter photometer, which uses an absorption filter (shown here) or interference filter to isolate a band of radiation. The analyst either inserts a removable filter or the filters are placed in a carousel, … Continue reading

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