IPC 6 English version G02F-G02F 7/00

G02F-G02F00700

SECTION G– PHYSICS

G 02

OPTICS (making optical elements or apparatus B 24 B, B 29 D 11/00, C 03, or other appropriate subclasses or classes; materials per se, see the relevant places, e.g. C 03 B, C 03 C)

G 02 F

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 G 01 D 5/26; devices in which mathematical operations are carried out with optical elements G 06 E 3/00; electrical signal transmission systems using optical means to convert the input signal G 08 C 19/36; information-recording by electric or magnetic means and reproducing by sensing optical properties G 11 B 11/00; static stores using optical elements G 11 C 13/04; transmission systems employing electromagnetic waves other than radio waves, e.g. light, infra-red radiation, H 04 B 10/00; optical multiplex systems H 04 J 14/00; pictorial communication, e.g. television H 04 N) [2,4]

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 G 01 K 11/12, using changes in fluorescence G 01 K 11/32; light guide devices G 02 B 6/00; optical devices or arrangements using movable or deformable elements for controlling light independent of the light source G 02 B 26/00; control of light in general G 05 D 25/00; visible signalling systems G 08 B 5/00; indicating arrangements for variable information by selection or combination of individual elements G 09 F 9/00; control arrangements or circuits for visual indicators other than cathode-ray tubes G 09 G 3/00; control of light sources H 01 S 3/10, H 05 B 33/08, H 05 B 35/00 to H 05 B 43/00) [2,4]

Note

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]

for the control of the intensity, phase, polarisation or colour (G 02 F 1/29 takes precedence; polarizing elements per se G 02 B 5/30; static storage per se G 11 C; image tube screens acting as light valves by shutter operation H 01 J 29/12; such screen acting by discoloration H 01 J 29/14) [2]

015

based on semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction (G 02 F 1/03 takes precedence) [3]

025

in an optical waveguide structure [5]

based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect [2,4]

035

in an optical waveguide structure [5]

with ferro-electric properties (G 02 F 1/035, G 02 F 1/055 take precedence) [2,5]

055

the active material being a ceramic (G 02 F 1/035 takes precedence) [4,5]

based on electro-optical liquids exhibiting Kerr effect [2]

based on magneto-optical elements, e.g. exhibiting Faraday effect [2]

095

in an optical waveguide structure [5]

based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves (acousto-optical deflection G 02 F 1/33) [2]

125

in an optical waveguide structure [5]

based on liquid crystals, e.g. single liquid crystal display cells (liquid crystal materials C 09 K 19/00) [2]

133

Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix G 09 G 3/36) [3]

1333

Constructional arrangements (G 02 F 1/135, G 02 F 1/136 take precedence) [5]

1335

Structural association of optical devices, e.g. polarisers, reflectors or illuminating devices, with the cell [5]

1337

Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers [5]

1339

Gaskets; Spacers; Sealing of the cell [5]

1341

Filling or closing of the cell [5]

1343

Electrodes [5]

1345

Conductors connecting electrodes to cell terminals [5]

1347

Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells [5]

135

Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied [3]

136

Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit (G 02 F 1/135 takes precedence) [5]

137

characterised by a particular electro- or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction, dynamic scattering [3]

139

based on orientation effects in which the liquid crystal remains transparent [6]

141

using ferroelectric liquid crystals [6]

based on electrochromic elements [5]

153

Constructional arrangements [5]

155

Electrodes [5]

157

Structural association of optical devices, e.g. reflectors or illuminating devices, with the cell [5]

161

Gaskets; Spacers; Sealing of the cell; Filling or closing of the cell [5]

163

Operation of electrochromic cells; Circuit arrangements [5]

167

based on electrophoresis [5]

based on variable absorption elements (G 02 F 1/015 to G 02 F 1/167 take precedence) [2,5]

based on variable reflection or refraction elements (G 02 F 1/015 to G 02 F 1/167 take precedence) [2,5]

by interference [2]

225

in an optical waveguide structure [5]

for the control of the colour (G 02 F 1/03 to G 02 F 1/21 take precedence) [2]

as to hue or predominant wavelength [2]

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 G 11 C; lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted H 01 S 3/101) [4]

295

in an optical waveguide structure (G 02 F 1/313, G 02 F 1/335 take precedence) [5]

Digital deflection devices (G 02 F 1/33 takes precedence) [2]

313

in an optical waveguide structure [5]

315

based on the use of controlled total internal reflection [3]

Acousto-optical deflection devices [2]

335

having an optical waveguide structure [5]

Non-linear optics (optical bistable devices G 02 F 3/02; lasers using stimulated Brillouin or Raman effect H 01 S 3/30) [2,5]

for second-harmonic generation [2]

for parametric generation or amplification of light, infra-red, or ultra-violet waves (electrical parametric amplifiers H 03 F 7/00) [2]

Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light (G 02 F 1/35 takes precedence; photoelectric detecting or measuring devices G 01 J, H 01 J 40/00, H 01 L 31/00; demodulating laser arrangements H 01 S 3/10; demodulation or transference of modulation of modulated electromagnetic waves in general H 03 D 9/00) [2]

Frequency-changing of light, e.g. by quantum counters (luminescent materials C 09 K 11/00) [2]

Optical logic elements (electric-pulse generators using opto-electronic devices as active elements H 03 K 3/42; logic circuits using opto-electronic devices H 03 K 19/14); Optical bistable devices [5]

Optical bistable devices [5]

Optical analogue/digital converters

Note

This group covers only converters based in substantial manner on elements which are provided for in group G 02 F 1/00. [4]