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Table 3 A summary of differences between Raman spectroscopy and hyperspectral imaging as used in this study

From: Comparing the effectiveness of hyperspectral imaging and Raman spectroscopy: a case study on Armenian manuscripts

 

Raman spectroscopy

HSI

Analysed area

Spot size: 30 µm diameter

Pixel size: 13,000 µm across

Counting time by spot or surface unit

≈ 5 min

≈ 0.33 mm s−1

Irradiance

0.4 mW

≈ 3.5 lux h

Advantages

Identification can be made unequivocally through the use of characteristic peaks

Identification relies upon the comparison of reflectance spectra and must be backed up by another method of analysis

Disadvantages

Limited spots can be analysed in a reasonable time frame

Larger areas can be scanned in a reasonable time allowing the user to ‘map’ important features