Structured Light Patterns Work Like a Hologram

• Published in: Applied sciences Vol. 13; no. 6; p. 4037
• Main Authors: Shoydin, Sergey Alexandrovich, Pazoev, Artem Levonovich
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.03.2023
• Subjects: 3D photography; Algorithms; Augmented Reality; digital holography; Electric waves; Electromagnetic radiation; Electromagnetic waves; Electromagnetism; Fourier transforms; holographic interference fringes; holography; interference; Light; single-sideband modulation; Russia
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app13064037

The subject of this investigation is light diffraction from a structure formed at the lateral projection of structured light on the surface of a 3D object. It is demonstrated that the patterns of vertically structured light fringes change their structure during the lateral illumination of a 3D object, and take on the properties of holograms. The diffraction of light from this structure forms several diffraction orders, and one of them can restore the image of the 3D object. Results of the numerical experiment demonstrating the possibility to restore 3D holographic images by these patterns at a wavelength corresponding to Bragg conditions are presented. The obtained result allows an order of magnitude higher compression of the holographic information about a 3D object to be transmitted along the communication channel, in a volume that is sufficient for visual perception, and for the observation of both the horizontal and vertical continuous parallax. Results of the experiments on the transmission of this compressed information are presented to demonstrate that the TV frame rate frequency of the 3D holographic video sequence is quite achievable.