G01J2001/161 - CPC Classification Index

ClassID:

165832 ⎘

G01J2001/161 - CPC Classification

Classification description:

Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors Ratio method, i.e. Im/Ir

Sub-classes:

G01J2001/1615 » {Computing a difference/sum ratio, i.e. (Im - Ir) / (Im + Ir)} 2
G01J2001/1621 » {Comparing a duty ratio of pulses} 0

Recent Application in this class:

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2019-08-22

Gas detection apparatus and method

20180217056

2018-08-02

Gas detection apparatus and method

20170343411

2017-11-30

Laser wavelength detectors

20150202887

2015-07-23

Method of manufacturing print head, print head and image forming apparatus, using light density data for print head correction