HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; ; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; )

Introduced: July 1974

Description

G03H covers holographic technologies for recording, reproducing, and displaying three-dimensional images using interference and diffraction of coherent light waves. This subclass encompasses hologram production methods (including photographic recording on sensitive media), apparatus for hologram generation and viewing, and reconstruction techniques for displaying stored holographic information. Inventions in this area include laser-based recording systems, display devices, security applications (e.g., holograms on identification documents), and data storage utilizing holographic principles. Related optical technologies such as conventional photography (G03B, G03C) and general diffractive optical elements are classified elsewhere.

Title

Titles differ between systems:

IPC: HOLOGRAPHIC PROCESSES OR APPARATUS

CPC: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; ; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; )

Full Title

Full titles differ between systems:

IPC:

HOLOGRAPHIC PROCESSES OR APPARATUS

CPC:

HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; ; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; )

CPC subdivides this area 5x more granularly than IPC with 12 additional codes.

12 codes are CPC-only extensions.

Note: 12 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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G03H 1/00 Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto since 1974 +1 CPC IPC+CPC Available in IPC and CPC
G03H 2210/00 Object characteristics 2nd only +7 CPC CPC only CPC only
G03H 2222/00 Light sources or light beam properties 2nd only +10 CPC CPC only CPC only
G03H 2223/00 Optical components 2nd only +16 CPC CPC only CPC only
G03H 2224/00 Writing means other than actinic light wave 2nd only +3 CPC CPC only CPC only
G03H 2225/00 Active addressable light modulator 2nd only +6 CPC CPC only CPC only
G03H 2226/00 Electro-optic or electronic components relating to digital holography 2nd only +4 CPC CPC only CPC only
G03H 2227/00 Mechanical components or mechanical aspects not otherwise provided for 2nd only +4 CPC CPC only CPC only
G03H 2230/00 Form or shape of the hologram when not registered to the substrate 2nd only +1 CPC CPC only CPC only
G03H 2240/00 Hologram nature or properties 2nd only +3 CPC CPC only CPC only
G03H 2250/00 Laminate comprising a hologram layer 2nd only +16 CPC CPC only CPC only
G03H 2260/00 Recording materials or recording processes 2nd only +6 CPC CPC only CPC only
G03H 2270/00 Substrate bearing the hologram 2nd only +7 CPC CPC only CPC only
G03H 3/00 Holographic processes or apparatus using ultrasonic, sonic or infrasonic waves for obtaining holograms; Processes or apparatus for obtaining an optical image from them (G03H1/22 takes precedence) since 1974 IPC+CPC Available in IPC and CPC
G03H 5/00 Holographic processes or apparatus using particles or using waves other than those covered by groups G03H1/00 or G03H3/00 for obtaining holograms; Processes or apparatus for obtaining an optical image from them (G03H1/22 takes precedence; construction of electron microscopes H01J37/26; ) since 1974 IPC+CPC Available in IPC and CPC