G03H HOLOGRAPHIC PROCESSES OR APPARATUS
Introduced: July 1974
Classification Context
- Section:
- PHYSICS
- Class:
- PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- Subclass:
- HOLOGRAPHIC PROCESSES OR APPARATUS
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.
Scope Notes
Glossary: rainbow hologram or Benton hologram rainbow hologram Benton hologram rainbow holograms Benton holograms microrelief structure consisting from multiple numbers of microdimensional grooves. The rainbow hologram separates out components wavelengths of white light and sends them in different directions, so that the viewer sees the image by light of only one wavelength. multiplex hologram multiplex holograms is produced by combining a large number of photographs in a holographic manner. | Limiting references: Holograms used as optical elements Analogue computers performing mathematical operations with the aid of optical elements Arrangements for recognition printed or written characters using holographic masks | Application references: Holograms used on information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof Interferometers using holographic techniques Holograms used for marking record carriers Holograms using for recording or reproducing of information on carriers, e.g. holographic storage , Television signal recording using holographic recording
Related Keywords
3 direct subcodes
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
- 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
- G03H 5/00 Holographic processes or apparatus using particles or using waves other than those covered by groups or for obtaining holograms; Processes or apparatus for obtaining an optical image from them