Microscopic three-dimensional imaging and phase quantification for objects hidden behind a scattering medium by using in-line phase-shift digital holography are proposed. A spatial resolution of 1.81 µm highly accurate quantitative demonstrated scatter plate. Three-dimensional was confirmed with depth difference 1.32 mm. Further, performed rat skin as demonstration through complex multilayer medium, where close to the theoretically predicted value achieved experiment.

Fringe projection profilometry is a high-precision method used to measure the 3D shape of an object by projecting sinusoidal fringes onto object. However, projected metallic or shiny are distorted nonlinearly, which causes significant measurement errors. A for objects that employs computer graphics (CG) and deep learning proposed. We trained neural network on in CG space. Our results show can reduce nonlinear fringe distortion caused gloss real

A novel cross-domain image retrieval system that is based on a high-speed optical correlator with coaxial holographic presented. Our newly designed conversion module for the allows various kinds of data to be converted pagedata uniform intensity by using an autoencoder, which difficult other conventional methods. By our module, existing model deep learning could utilized as feature extractor. sketch-based goal discovering similar photos querying freehand human sketches was experimentally...

A digital holographic microscope (DHM) can noninvasively acquire amplitude and quantitative phase information such as the thickness refractive index of microscopic objects. However, conventional DHMs with a two-beam interference optical system require strict alignment, large complex system, other optomechanical parts. In this paper, we present planar lightwave circuit DHM (PLC-DHM) no moving parts lenses, developed by optimizing design PLC systems. The PLC-DHM accurately acquires intensity...

Abstract A computation speed of more than 100 Gbps is experimentally demonstrated using our developed ultrahigh-speed optical correlator. To verify this high practically, the speeds correlator and conventional digital image matching are quantitatively compared. We use a population count function that achieves fastest calculation when calculating binary by central processing unit (CPU). The dramatically faster CPU (2.40 GHz × 4) 16 GB random access memory, especially data large-scale.

Optical fiber sensors have numerous advantages over electrical sensors. However, in some cases, sensing systems based on optical are inferior to terms of cost because expensive instruments required. Therefore, cost-effective options must be developed. Here, inexpensive transceivers (OTRs) for Ethernet were used instead a broadband light source and spectrum analyzer, CO2 laser-induced long-period grating (LPFG) was as temperature sensor. The system implemented introducing OTRs LPFG an...

The importance of encryption in free-space optical communication systems has been increasing due to their widespread use. Herein, for the first time, authors propose a novel two-dimensional system using two spatial patterns as keys. A data stream is physically encrypted with signals reduce risk unauthorised third-party intrusion into communication. and restoration binary proposed are confirmed by simulation results. believe that, future, could be used an method at physical layer level...

A high-speed volume holographic optical correlator is developed, which takes advantage of a coaxial system. We have realized this using an optimal design the signal pattern, improves shift multiplex recording pitch. The speed was further improved by increasing number pixels in spatial light modulator and high rotating actuator. This correlation system successfully achieved equal error rate 0% performing over 900 times. It also experiment, at pitch 2.45 µm disk rotation rpm. In terms...

Abstract This letter reports a proof‐of‐concept experiment conducted on novel application of the multi‐core fibre (MCF), where image reconstruction is based single‐pixel imaging (SPI) technique and diffraction pattern emitted from an MCF. The intended to reduce size SPI system, applications which can now be extended with help this study.

Using a holographic disc memory on which huge amount of data can be stored, we constructed an ultra-high-speed, all-optical correlation system. In this method, multiplex recording is, however, restricted to "one page" spot." addition, signal information must normalized as the same size, even if object size is smaller. Therefore, system difficult apply part scene (i.e., partial searching and template matching), while maintaining high accessibility programmability. paper, develop by time...

Computational ghost imaging (CGI) has received increasing attention as a single pixel technique. However, the application of CGI technique to moving objects requires further investigation because it large number patterns at high speeds. In this study, we propose and experimentally demonstrate optical correlator-based step towards high-speed CGI. Our correlator plays role spatial light modulator correlates target object known general computational imaging. We verified that RMS error...

We propose a network management method using novel adapter that translates OpenFlow-based commands and vendor-specific single-board computer to achieve low-cost centralized of heterogeneous devices including various vendors.The is implemented in wired wireless its operation verified.Moreover, we compare the cost two scenarios, i.e., smart home small-and medium-sized enterprise network.The results show proposed works efficiently than conventional method.

To realize a highly sensitive glass-capillary-encapsulated long-period fiber grating (LPFG) sensor, we propose filling the capillary with liquid-phase material, which was not proposed previously.It found theoretically that high sensitivity can be achieved by using liquidphase filler thermal conductivity of 0.1 W/(m ‧ K) or more, large negative thermo-optic coefficient (TOC), and refractive index 1.46 (optical cladding index) less.On basis theoretical results, ethanol, ethylene glycol,...

A new lens-less planar lightwave circuit digital holographic microscope (PLC-DHM) with higher relative refractive index difference between the core and cladding of PLC has been developed to improve spatial resolution.

Automatic video identification is important for indexing, search purposes, and removing illegal material on the Internet. By combining a high-speed correlation engine web-scanning technology, we developed Fast Recognition Correlation system (FReCs), FReCs an application thatsearches through number of websites with user-generated content (UGC) detects that violates copyright law. In this paper, describe configuration approach to investigating UGC using FReCs. The paper also illustrates...

Single-pixel imaging (SPI) has recently drawn considerable attention as a new technique. An SPI system using multi-core fiber (MCF-SPI system) that we proposed the potential to make very compact. This study is concerned with features and reconstruction properties of MCF-SPI system. In this system, quality varies widely depending on number placement cores. It necessary use algorithms suitable for considering performance limitations patterns, improve output quality. The speckle patterns...

It is important to reduce the cost of sensing system promote social implementation optical fiber sensors. The light source and photodetector with analysis functions, e.g., spectrum analyzer, are most expensive components an system. To solve this problem, we have proposed Ethernet-based temperature This uses inexpensive transceiver (OTR) as a for Ethernet single-board computer evaluation functions cost. In letter, propose method enhance function in our by using multiple OTRs different output...

With increased use of smartphones and social networking services, the amount unstructured image data has been increasing significantly. A high-speed search method is required to such for big analysis. Holographic optical correlation a promising technique this purpose. This study introduces recording that realizes speedup in an correlator. High-density effective achieving not only speedup, but also high capacity. However, high-density by shortening shift shift-multiplexed results large error...

We previously proposed a three-dimensional microscopic imaging system for objects hidden behind scattering media using in-line phase-shift digital holography, which simultaneously captures amplitude and phase information. However, as the thickness of medium increases, influence is enhanced, reconstructed image object deteriorates. In this paper, we report evaluation near-infrared light source with wavelength 780 nm that capable deep tissue penetration. A favorable rat-skin sample 912...

A single-pixel imaging (SPI) system using a multi-core fiber (MCF), which is referred to as MCF-SPI, proposed. It combines the MCF technology and SPI algorithm. preliminary experiment of spatial pattern generation was demonstrated an MCF.