G
SECTION G — PHYSICS
  
INSTRUMENTS
 G01
MEASURING (counting G06M); TESTING
 G01J
MEASUREMENT OF INTENSITY, VELOCITY, OR SPECTRAL CONTENT OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating optical properties of materials, fluid cells G01N)
 G01J

Note(s)

  1. Attention is drawn to the notes immediately following the class title (G01).
  2. This sub-class includes the detection of the presence or absence of infra-red, visible, or ultra-violet light, not otherwise provided for.
 G01J 1/00
Photometry, e.g. photographic exposure meter (spectrophotometry G01J 3/00; specially adapted for radiation pyrometry G01J 5/00)
 G01J 1/02
·  Details
 G01J 1/04
·  ·  Optical or mechanical part
 G01J 1/06
·  ·  ·  Restricting the angle of incident light
 G01J 1/08
·  ·  Arrangements of light sources specially adapted for photometry
 G01J 1/10
·  by comparison with reference light or electric value
 G01J 1/12
·  ·  using wholly visual means (G01J 1/20 takes precedence)
 G01J 1/14
·  ·  ·  using comparison with a surface of graded brightness
 G01J 1/16
·  ·  using electric radiation detectors (G01J 1/20 takes precedence)
 G01J 1/18
·  ·  ·  using comparison with a reference electric value
 G01J 1/20
·  ·  intensity of the measured or reference value being varied to equalise their effects at the detector, e.g. by varying incidence angle
 G01J 1/22
·  ·  ·  using a variable element in the light-path, e.g. filter, polarising means (G01J 1/34 takes precedence)
 G01J 1/24
·  ·  ·  ·  using electric radiation detectors
 G01J 1/26
·  ·  ·  ·  ·  adapted for automatic variation of the measured or reference value (regulation of light intensity G05D 25/00)
 G01J 1/28
·  ·  ·  using variation of intensity or distance of source (G01J 1/34 takes precedence)
 G01J 1/30
·  ·  ·  ·  using electric radiation detectors
 G01J 1/32
·  ·  ·  ·  ·  adapted for automatic variation of the measured or reference value (regulation of light intensity G05D 25/00)
 G01J 1/34
·  ·  ·  using separate light-paths used alternately or sequentially, e.g. flicker
 G01J 1/36
·  ·  ·  ·  using electric radiation detectors
 G01J 1/38
·  using wholly visual means (G01J 1/10 takes precedence)
 G01J 1/40
·  ·  using limit of visibility or extinction effect
 G01J 1/42
·  using electric radiation detectors (optical or mechanical part G01J 1/04; by comparison with a reference light or electric value G01J 1/10)
 G01J 1/44
·  ·  Electric circuits
 G01J 1/46
·  ·  ·  using a capacitor
 G01J 1/48
·  using chemical effects
 G01J 1/50
·  ·  using change in colour of an indicator, e.g. actinometer
 G01J 1/52
·  ·  using photographic effects
 G01J 1/54
·  ·  by observing photo-reactions between gases
 G01J 1/56
·  using radiation pressure or radiometer effect
 G01J 1/58
·  using luminescence generated by light
 G01J 1/60
·  by measuring the pupil of the eye
 G01J 3/00
Spectrometry; Spectrophotometry; Monochromators; Measuring colour; Colorimeters (specially adapted for radiation pyrometry G01J 5/00)
 G01J 3/02
·  Details
 G01J 3/04
·  ·  Slit arrangements
 G01J 3/06
·  ·  Scanning arrangements
 G01J 3/08
·  ·  Beam-switching arrangements
 G01J 3/10
·  ·  Arrangements of light sources specially adapted for spectrometry or colorimetry
 G01J 3/12
·  Generating the spectrum; Monochromators
 G01J 3/14
·  ·  using refracting elements, e.g. prism (G01J 3/18, G01J 3/26 take precedence)
 G01J 3/16
·  ·  ·  with autocollimation
 G01J 3/18
·  ·  using diffraction elements, e.g. grating (gratings per se G02B)
 G01J 3/20
·  ·  ·  Rowland circle spectrometers
 G01J 3/22
·  ·  ·  Littrow mirror spectrometers
 G01J 3/24
·  ·  ·  using gratings profiled to favour a specific order
 G01J 3/26
·  ·  using multiple reflection, e.g. Fabry-Perot interferometer
 G01J 3/28
·  Investigating the spectrum (using colour filters G01J 3/48)
 G01J 3/30
·  ·  Measuring the intensity of spectral lines directly on the spectrum itself (G01J 3/42, G01J 3/44 take precedence)
 G01J 3/32
·  ·  ·  Investigating bands of a spectrum in sequence by a single detector
 G01J 3/34
·  ·  ·  ·  using electric radiation detectors
 G01J 3/36
·  ·  ·  Investigating two or more bands of a spectrum by separate detectors
 G01J 3/38
·  ·  ·  ·  using electric radiation detectors
 G01J 3/40
·  ·  Measuring the intensity of spectral lines by determining density of a photograph of the spectrum (G01J 3/42, G01J 3/44 take precedence)
 G01J 3/42
·  ·  Absorption spectrometry; Double-beam spectrometry; Flicker spectrometry (beam-switching arrangements G01J 3/08)
 G01J 3/44
·  ·  Raman spectrometry
 G01J 3/46
·  Measurement of colour; Colorimeters (measuring colour temperature G01J 5/60)
 G01J 3/48
·  ·  using colour filters
 G01J 3/50
·  ·  ·  using electric radiation detectors
 G01J 3/52
·  ·  using colour charts
 G01J 5/00
Radiation pyrometry (photometry in general G01J 1/00; spectrometry in general G01J 3/00)
 G01J 5/02
·  Details
 G01J 5/04
·  ·  Casings
 G01J 5/06
·  ·  Arrangements for eliminating effects of disturbing radiation
 G01J 5/08
·  ·  Optical features
 G01J 5/10
·  using electric radiation detectors
 G01J 5/12
·  ·  using thermoelectric elements, e.g. thermocouples (thermoelectric elements per se H01V 1/00)
 G01J 5/14
·  ·  ·  Electrical features
 G01J 5/16
·  ·  ·  ·  Arrangements with respect to the cold junction; Compensating influence of ambient temperature or other variables
 G01J 5/18
·  ·  ·  ·  Special adaptation for indicating or recording (indicating or recording measured values in general G01D)
 G01J 5/20
·  ·  using resistors, thermistors, or semiconductors sensitive to radiation
 G01J 5/22
·  ·  ·  Electrical features
 G01J 5/24
·  ·  ·  ·  Use of a specially-adapted circuit, e.g. bridge circuit
 G01J 5/26
·  ·  ·  ·  Special adaptation for indicating or recording (indicating or recording measured values in general G01D)
 G01J 5/28
·  ·  using photo-emissive, photo-conductive, or photo-voltaic cells
 G01J 5/30
·  ·  ·  Electrical features
 G01J 5/32
·  ·  ·  ·  Special adaptation for indicating or recording (indicating or recording measured values in general G01D)
 G01J 5/34
·  ·  using capacitors
 G01J 5/36
·  ·  using ionisation of gases
 G01J 5/38
·  using extension or expansion of solids or fluids
 G01J 5/40
·  ·  using bimetallic elements
 G01J 5/42
·  ·  using Golay cells
 G01J 5/44
·  ·  using change of resonant frequency, e.g. of piezo-electric crystal
 G01J 5/46
·  using radiation pressure or radiometer effect
 G01J 5/48
·  using wholly visual means
 G01J 5/50
·  using techniques specified in the sub-groups below
 G01J 5/52
·  ·  using comparison with reference sources, e.g. disappearing-filament pyrometer
 G01J 5/54
·  ·  ·  Optical features
 G01J 5/56
·  ·  ·  Electrical features
 G01J 5/58
·  ·  using absorption; using polarisation; using extinction effect
 G01J 5/60
·  ·  using determination of colour temperature
 G01J 5/62
·  ·  using means for chopping the light
 G01J 7/00
Measuring velocity of light