|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G02 |
OPTICS (making optical elements or apparatus Fulltext... Hierarchy... Expanded...B24B, Fulltext... Hierarchy... Expanded...B29D, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...H01S 3/00; light sources per se Fulltext... Hierarchy... Expanded...F21, Fulltext... Hierarchy... Expanded...H01J, Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...H03K 19/14)

|  | G02F 7/00 |
Optical analogue-digital converters