G01J MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)
Introduced: September 1968
Description
G01J encompasses instruments and methods for measuring physical properties of electromagnetic radiation in the infrared, visible, and ultraviolet wavelength ranges. The subclass covers intensity measurement, spectral analysis, polarization characteristics, phase determination, and temporal pulse properties of light, as well as colorimetric analysis and radiation pyrometry for non-contact temperature measurement. Applications include spectrophotometers, photometers, spectrographs, polarimeters, interferometers, and thermal imaging systems used in scientific research, manufacturing quality control, and materials characterization.
Title
Titles differ between systems:
IPC: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
CPC: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)
Full Title
Full titles differ between systems:
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)
Additional Content IPC
Limiting references
Non-optical measurement of temperature Semiconductor devices sensitive to light , ,
Application references
Measuring length, thickness or similar linear dimensions by optical means; Instruments therefor , Investigating or analysing materials by optical means, e.g. by ellipsometry Prospecting or detecting by optical means Controlling or varying light intensity, spectral composition or exposure time in photographic printing apparatus Exposure in photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces
IPC and CPC are identically structured here. All 7 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01J 1/00 Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) IPC+CPC Available in IPC and CPC
- G01J 11/00 Measuring the characteristics of individual optical pulses or of optical pulse trains since 1990 +1 CPC IPC+CPC Available in IPC and CPC
- G01J 3/00 Spectrometry; Spectrophotometry; Monochromators; Measuring colours +2 CPC IPC+CPC Available in IPC and CPC
- G01J 5/00 Radiation pyrometry, e.g. infrared or optical thermometry +12 CPC IPC+CPC Available in IPC and CPC
- G01J 9/00 Measuring optical phase difference (devices or arrangements for controlling the phase of light beams G02F1/01); Determining degree of coherence; Measuring optical wavelength (spectrometry G01J3/00) since 1980 +3 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class G01,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 41,447
- CHINESE ACADEMY OF SCIENCES 32,952
- ROBERT BOSCH DE 16,470
- SAMSUNG ELECTRONICS COMPANY KR 10,052
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
- ZHEJIANG UNIVERSITY 9,529
- GUANGDONG POWER GRID CORPORATION 8,615
- TSINGHUA UNIVERSITY 7,805
- HALLIBURTON ENERGY SERVICES GROUP US 7,796
- QUALCOMM US 7,171
Top Applicants (CPC)
Class G01,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 21,460
- ROBERT BOSCH DE 17,801
- SGCC(STATE GRID CORPORATION OF CHINA) 17,347
- SAMSUNG ELECTRONICS COMPANY KR 13,192
- QUALCOMM US 9,900
- HALLIBURTON ENERGY SERVICES GROUP US 9,742
- PHILIPS ELECTRONICS NL 7,249
- MITSUBISHI ELECTRIC CORPORATION JP 6,503
- ZHEJIANG UNIVERSITY 6,414
- DENSO CORPORATION JP 6,382