G
SECTION G — PHYSICS
  
INSTRUMENTS
 G02
OPTICS (making optical elements or apparatus B24B, B29D 11/00, C03, or other appropriate subclasses or classes; materials per se, see the relevant places, e.g. C03B, C03C)
 G02

Note(s)

In this class, the following expression is used with the meaning indicated:

  • "optical" applies not only to visible light but also to ultra-violet or infra-red radiations.

 G02F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS (optical transfer means between sensing member and indicating or recording part in connection with measuring G01D 5/26; devices in which mathematical operations are carried out with optical elements G06G 9/00; electrical signal transmission systems using optical means to convert the input signal G08C 19/36; information-recording by electric or magnetic means and reproducing by sensing optical properties G11B 11/00; static stores using optical elements G11C 13/04; transmission systems employing electromagnetic waves other than radio waves, e.g. light, infra-red radiation, H04B 9/00; pictorial communication, e.g. television H04N)
 G02F 1/00
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics (thermometers using change of colour or translucency G01K 11/12; optical devices or arrangements using movable or deformable elements for controlling light independent of the light source G02B 26/00; control of light in general G05D 25/00; indicating arrangements for variable information by selection or combination of individual elements G09F 9/00; arrangements or circuits for control of indicating devices using static means to present variable information G09G; control of light sources H01S 3/10, H05B 33/08, H05B 35/00-H05B 43/00)
 G02F 1/00

Note(s)

This group covers only:

  • devices or arrangements, e.g. cells, the optical operation of which is modified by changing the optical properties of the medium of the devices or arrangements by the influence or control of physical parameters, e.g. electric fields, electric current, magnetic fields, sound or mechanical vibrations, stress or thermal effects; [2]
  • devices or arrangements in which the electric or magnetic field component of the light beams influences the optical properties of the medium, i.e. non-linear optics; [2]
  • control of light by electromagnetic waves, e.g. radio waves, or by electrons or other elementary particles. [2]

 G02F 1/01
·  for the control of the intensity, phase, polarisation or colour (G02F 1/29 takes precedence; polarizing elements per se G02B 5/30; static storage per se G11C; image tube screens acting as light valves by shutter operation H01J 29/12; such screen acting by discoloration H01J 29/14)  [2]
 G02F 1/015
·  ·  based on semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction (G02F 1/03 takes precedence)  [3]
 G02F 1/03
·  ·  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect  [2]
 G02F 1/05
·  ·  ·  with ferro-electric properties  [2]
 G02F 1/055
·  ·  ·  the active material being a ceramic  [4]
 G02F 1/07
·  ·  based on electro-optical liquids exhibiting Kerr effect  [2]
 G02F 1/09
·  ·  based on magneto-optical elements, e.g. exhibiting Faraday effect  [2]
 G02F 1/11
·  ·  based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves (acousto-optical deflection G02F 1/33)  [3]
 G02F 1/13
·  ·  based on liquid crystals (liquid crystal materials C09K 19/00)  [2]
 G02F 1/133
·  ·  ·  Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements  [3]
 G02F 1/135
·  ·  ·  ·  Liquid crystal cells structurally associated with a supplementary layer, e.g. a photoconducting or a ferro-electric layer, the properties of which can be electrically or optically varied  [3]
 G02F 1/137
·  ·  ·  characterised by a particular electro- or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction, dynamic scattering  [3]
 G02F 1/17
·  ·  based on variable absorption elements (G02F 1/015-G02F 1/137 take precedence)  [2]
 G02F 1/19
·  ·  based on variable reflection or refraction elements (G02F 1/015-G02F 1/137 take precedence)  [2]
 G02F 1/21
·  ·  by interference  [2]
 G02F 1/23
·  ·  for the control of the colour (G02F 1/03-G02F 1/21 take precedence)  [2]
 G02F 1/25
·  ·  ·  as to hue or predominant wavelength  [2]
 G02F 1/29
·  for the control of the position or the direction of light beams, i.e. deflection (static stores with electric or magnetic read-in and optical read-out G11C; lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted H01S 3/101)  [2]
 G02F 1/31
·  ·  Digital deflection devices (G02F 1/33 takes precedence)  [2]
 G02F 1/315
·  ·  ·  based on the use of controlled total internal reflection  [3]
 G02F 1/33
·  ·  Acousto-optical deflection devices  [2]
 G02F 1/35
·  Non-linear optics (lasers using stimulated Brillouin or Raman effect H01S 3/30)  [2]
 G02F 1/37
·  ·  for second-harmonic generation  [2]
 G02F 1/39
·  ·  for parametric generation or amplification of light, infra-red, or ultra-violet waves (electrical parametric amplifiers H03F 7/00)  [2]
 G02F 2/00
Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light (G02F 1/35 takes precedence; photoelectric detecting or measuring devices G01J, H01J 40/00, H01L 31/00; demodulating laser arrangements H01S 3/10; demodulation or transference of modulation of modulated electromagnetic waves in general H03D 9/00)  [2]
 G02F 2/02
·  Frequency-changing of light, e.g. by quantum counters (luminescent materials C09K 11/00)  [2]
 G02F 3/00
Optical logic elements (electro-optical circuits H03K 19/14)
 G02F 7/00
Optical analogue/digital converters
 G02F 7/00

Note(s)

This group covers only converters based in substantial manner on elements which are provided for in group G02F 1/00.