CPC Subgroup
G01J 3/28 Investigating the spectrum (using colour filters G01J3/51)
Full Title
Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum (using colour filters G01J3/51)
18 direct subcodes
Child Classifications
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- G01J 3/30 Measuring the intensity of spectral lines directly on the spectrum itself (G01J3/42, G01J3/44 take precedence)
- G01J 3/40 Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)
- G01J 3/42 Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry (beam switching arrangements G01J3/08)
- G01J 3/44 Raman spectrometry; Scattering spectrometry
- G01J 3/443 Emission spectrometry
- G01J 3/447 Polarisation spectrometry
- G01J 3/45 Interferometric spectrometry
- G01J 3/457 Correlation spectrometry, e.g. of the intensity (G01J3/453 takes precedence)