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PCE
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DIFF Subgroup
G01J 1/60

by measuring the pupil of the eye

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Photometry, e.g. photographic exposure meter > by measuring the pupil of the eye

CPC:

Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > by measuring the pupil of the eye

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