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DIFF Subgroup
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)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography

CPC: Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)

Full Title

Full titles differ between systems:

IPC:

Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum > Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography

CPC:

Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum (using colour filters G01J3/51) > Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.