G01J1/28 - CPC Classification Index

ClassID:

165861 ⎘

G01J1/28 - CPC Classification

Classification description:

Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source

Sub-classes:

G01J1/30 » using electric radiation detectors 14

Recent Application in this class:

20220317023

2022-10-06

Optical measurement instrument, server device, and optical measurement method

20170211976

2017-07-27

Variable modulation of radiation and components

20150192773

2015-07-09

Variable modulation of radiation and components

20110279812

2011-11-17

Test apparatus, test method, and device interface for testing a device under test using optical signaling

20110163233

2011-07-07

Optical proximity sensor with improved dynamic range and sensitivity

20100051782

2010-03-04

Image reading device, computer readable medium, and light amount adjusting method

20080265131

2008-10-30

Electronic device having LED with variable brightness

20080225926

2008-09-18

IN SITU OPTICAL SURFACE TEMPERATURE MEASURING TECHNIQUES AND DEVICES

20080137945

2008-06-12

Apparatus and method for equalizing illumination of light sources for digital image test member, and apparatus and method for testing color of digital image using the same

#10

20060140248

2006-06-29

In situ optical surface temperature measuring techniques and devices

#11

20050013341

2005-01-20

Laser brightness