The Near-infrared region is normally considered to cover the wavelength range from 750 nm to 2500 nm, and Starna have developed reference materials for wavelength qualification in this region. A new , NIST traceable wavelength reference has also been developed for the Mid-infrared. |
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NIR Wavelength Reference Solution Reference (900 – 2600 nm) |
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This Reference Material can be used to qualify the wavelength calibration, in the Near Infrared region of the spectrum of spectrophotometers in transmission mode with spectral bandwidths of 5 nm or less. Approximate peak wavelength values (in nm) are:
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NIR Transflectance Reference (900 – 2600 nm) |
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This Reference Material is specially designed for the wavelength qualification of near infrared reflectance spectrophotometers over the range. Approximate peak values are as stated for the transmission reference |
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Near-and Mid-infrared Polystyrene References
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This popular reference material is now available as a NIST-traceable CRM covering wavelengths from 1.1µm to 18.5 µm (9000 cm-1 to 540 cm-1). A total of 20 peaks is available for wavelength qualification purposes. |
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Some references used in the visible region have useful peaks in the NIR and are included here for information:
Didymium Glass Filter
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The Didymium (neodymium & praseodymium) Glass filter produces characteristic peaks in the visible region of the spectrum, with 11 well-defined peaks from 430 nm to 890 nm. Approximate peak wavelength values (in nm) are:
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Didymium Oxide Solution
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The spectrum of didymium in perchloric acid contains 14 peaks
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