G
SECTION G — PHYSICS
  
INSTRUMENTS
 G02
OPTICS (making optical elements or apparatus B24B, B29D, C03, or other appropriate sub-class)
 G02F
MODULATING OR DEMODULATING LIGHT; OPTICAL LOGICAL ELEMENTS; OPTICAL ANALOGUE-DIGITAL CONVERTERS
 G02F 1/00
Modulating light
 G02F 1/00

Note(s)

This main group includes all devices in which the intensity, colour or polarisation of light is affected by electric or magnetic means or by sound or like mechanical vibrations and includes the, modulation of light by light, by radio waves and like electromagnetic waves and by electrons and other elementary particles.

 G02F 1/02
·  Modulating the production of light by a source, e.g. flame (by a laser H01S 3/00; light sources per se F21, H01J, H01K, H05B)
 G02F 1/04
·  ·  the source being an incandescent lamp
 G02F 1/06
·  ·  the source being an electric discharge lamp
 G02F 1/08
·  ·  the source being a cathode-ray tube (modulating television cathode-ray tubes H04N)
 G02F 1/10
·  ·  the source being an electric arc
 G02F 1/12
·  ·  the source being electroluminescent
 G02F 1/16
·  Modulating light arriving from an independent source
 G02F 1/18
·  ·  Modulating polarisation, e.g. by using scattering, Kerr magneto-optical effect
 G02F 1/20
·  ·  ·  by using optical rotation, e.g. electric
 G02F 1/22
·  ·  ·  ·  magnetic, e.g. Faraday rotation
 G02F 1/24
·  ·  ·  by using birefringence, e.g. mechanical
 G02F 1/26
·  ·  ·  ·  electric, e.g. Kerr electro-optical effect
 G02F 1/28
·  ·  Modulating intensity, e.g. variable-area modulation (G02F 1/18 takes precedence)
 G02F 1/30
·  ·  ·  by using variable interception of light, e.g. using direct interception
 G02F 1/32
·  ·  ·  ·  using diffraction
 G02F 1/34
·  ·  ·  ·  using reflection; using refraction
 G02F 1/36
·  ·  ·  by using variable absorption of light
 G02F 1/38
·  ·  ·  by using interference
 G02F 1/40
·  ·  Modulating colour (G02F 1/18 takes precedence)
 G02F 1/42
·  ·  ·  as to hue or predominating wavelength
 G02F 2/00
Demodulating light; Transferring the modulation of modulated light
 G02F 3/00
Optical logic elements (electro-optical circuits H03K 19/14)
 G02F 7/00
Optical analogue-digital converters