Optical setups for measuring the shape of three-dimensional objects by the method of band projection

Vishnyakov, G. N.; Loshchilov, K. E.

doi:10.1364/jot.78.000115

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…For this reason, an algorithm was proposed that provides the transmission of 3D holographic information in the form of two basic modalities of a 3D image, namely, the surface texture of the holographic object (the 3D scene) and its topographic depth map [7], which allows the necessary compression of the holographic information and its transmission similar to the transmission of a radio signal by means of single-sideband modulation (SSB). One of the methods of depth mapping is the technology of structured light lateral projection [8][9][10][11][12][13]. The vertical fringes of structured light form a pattern of spatial bands similar to a spatial frequency carrier hologram, and their deformation is similar to deviations containing the information on the 3D object.…”

Section: Introductionmentioning

confidence: 99%

Structured Light Patterns Work Like a Hologram

Shoydin

Pazoev

2023

Applied Sciences

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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.

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