G01J2001/186 - CPC Classification Index

ClassID:

165852 ⎘

G01J2001/186 - CPC Classification

Classification description:

Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors using comparison with a reference electric value Comparison or correction from an electric source within the processing circuit

Sub-classes:

G01J2001/188 » {on pulse train} 0

Recent Application in this class:

20230417596

Balanced light detector

20220214212

Optical measurement apparatus

20220205838

Balanced light detector

20210310859

LIGHT AMOUNT MEASUREMENT DEVICE AND CONTROL METHOD THEREFOR

20210055155

Balanced light detector

20200103274

Light obstruction sensor

20170261373

Light-detecting device and method for converting optical radiation on switched conductivity diodes

20150338269

Offset current compensation for photodiodes

20150323382

Light-detecting device and method for converting optical radiation on switched conductivity diodes

20150168211

Correction device and correction method for light reception power monitor

20150108328

Detector system and module for compensating dark current

20140363207

Light beam detection circuit, light beam scan unit and image forming apparatus to detect light beam that changes light-amount thereof

20130187029

Photodetector control circuit to control drive of a photodiode and current detection of a phototransistor