Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An Optical Encryption Method Based on Metasurface Holographic Technology

A technology of holographic technology and encryption method, applied in the field of micro-nano optics and information encryption, to achieve the unique effect of interpreting rules

Active Publication Date: 2022-02-15
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many optical encryption methods, based on fractional Fourier transform or double random phase encoding. Improve the computer encryption algorithm to achieve a more secure encryption method, but there are still innovations in this direction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An Optical Encryption Method Based on Metasurface Holographic Technology
  • An Optical Encryption Method Based on Metasurface Holographic Technology
  • An Optical Encryption Method Based on Metasurface Holographic Technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The overall flow chart of the optical encryption method based on metasurface holographic technology in the present invention is as follows figure 1 shown;

[0070] Step 1: The information sender uses the three-image association algorithm to generate holographic phase images A, B, and C;

[0071] The information sender first uses the traditional GS binary phase holographic algorithm to calculate the original images of three target holograms and five binary phase holograms corresponding to two blank images without information. The five phase holograms contain only two phase holograms. phase value and and Satisfied that the phase difference is about π Then bring the generated five images into the three-image association algorithm, optimize the mixing ratio involved in the neutralization operation of the algorithm, and obtain the holographic phase images A, B, and C. The flow chart of the three-image association computer holographic algorithm is as follows figure...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an optical encryption method based on metasurface holographic technology, belonging to the field of micro-nano optics and information encryption. The miniature holographic display integrating liquid crystal and metasurface of the present invention is composed of liquid crystal and an improved spatial light modulator, can realize regional electric control on a two-dimensional plane, and is light, thin and compact. The three-image correlation algorithm can generate three binary phase holograms that have a mathematical inclusion relationship, and the three holograms correspond to the three voltage distribution images one-to-one. Three voltage distribution maps are successively loaded on the micro-holographic display integrated with liquid crystal and metasurface, and the three basic maps for subsequent deciphering can be reproduced in the far field. The plaintext information can be restored by further referring to the ciphertext and the ciphertext lookup table. The optical encryption method has certain security and can cover multiple types of plaintext content, and can be used for information encryption and safe transmission process of specific occasions and specific objects.

Description

technical field [0001] The invention relates to an optical encryption method based on metasurface holographic technology, which has better uniqueness and security. The micro-holographic display integrated with liquid crystal and metasurface covers a wide range of encrypted information and can be applied in specific occasions In the safe transmission of information or information encryption, it belongs to the field of micro-nano optics and information encryption. Background technique [0002] Metasurfaces are two-dimensional arrays of subwavelength-sized metallic or dielectric nanoantennas. By optimizing the design of the nanoantenna array, each pixel unit on the metasurface can introduce a phase mutation at the interface between the two media, so that the incident electromagnetic wave is imposed with an arbitrary phase distribution. Based on this, researchers have used metasurfaces to achieve many meaningful theoretical and experimental studies such as anomalous refraction,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/00G03H1/04G03H1/08
CPCG03H1/0011G03H1/0443G03H1/0808G03H1/0866G03H2001/0022
Inventor 黄玲玲祝双琦王涌天李晓炜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com