One-step reconstruction of assembled 3D holographic scenes

Self Cite

We present an experimental off-axis optical holographic scheme employing a digital micromirror device (DMD) as projecting media instead of a liquid crystal spatial light modulator (SLM). The DMD allows projecting information through light reflection. We perform holographic recording in the Fourier and the Fresnel domains under similar experimental configurations to test our experimental scheme and verify the DMD performance as a binary amplitude SLM. For the digital holographic recovery process of Fourier holograms, we applied a non-linear modification that allows reducing the degradation in the recovered data. We also implement a multiplexing protocol enabling the packaging of an entire holographic dynamic scene into a single data. Furthermore, we use QR codes as information containers to achieve noise-free information recovery after holographic reconstruction. Experimental results demonstrate the viability and versatility of a DMD in an experimental holographic scheme.

Section: Introductionmentioning

confidence: 99%

Experimental Fresnel and Fourier digital holography using a digital micro-mirror device

Jaramillo-Osorio¹,

Quinchia²,

Muñoz³

et al. 2021

Self Cite

“…Among the applications of digital holography, we find metrology, microscopy, medical imaging, and optical security [1][2][3][4][5][6][7][8][9][10], to name a few. Specifically, digital holography allows for recording information from 2D and 3D objects [11,12], providing additional degrees of freedom for optical processing [13][14][15], and consequently making possible the reconstruction of scenes with depth [16].…”

Section: Introductionmentioning

confidence: 99%

Optical field data compression by opto-digital means

Vélez¹,

Barrera²,

Trejos³

et al. 2016

Self Cite

Compression of optical field data is of interest due to the many applications where this kind of information processing is necessary. In particular, holographic recording has significant requirements in a high volume of both phase and amplitude data. We analyze and present a comparison between the performances of two lossy compression methods applied over optical field data: the optical scaling compression technique based on a virtual optical system that performs a scaling of the optical field data, and the JPEG format. In particular, we study the compression of optical fields data extracted from off-axis digital holograms. Our results show that optical scaling is better suited for the compression of the highly random phase information found in the optical field data of 3D diffuse objects. Data loss and volume reduction for each method are measured and compared.

“…Processing in the Fourier domain represents another tactic by filtering non-relevant terms contained in the hologram [9]. Recent examples deal with multiplexing and reconstruction in one step of 3D scenes [10].…”

Section: Introductionmentioning

confidence: 99%

Optical approach for the efficient data volume handling in experimentally encrypted data

Trejos

Barrera

Vélez

et al. 2016

Self Cite

Experimental optical procedures generate a tremendous amount of data, which must be then processed for any practical application. We present a new optical approach in terms of the data volume for the efficient handling of multiple data obtained from an experimental cryptosystem. In order to achieve this goal, we use the combination of optical filtering and optical scaling of the experimentally registered data. The intention is to reduce by optical means the amount of data to be managed. We define a so called 'efficiency factor' to describe the effectiveness of the approach. We find that volume reduction depends on this factor and the number of objects to be processed. We achieved substantial data volume reductions up to 94.24%. We introduce the basic concepts as well as experimental results that support both the feasibility and the applicability of our approach.