Coherence Gated Three-dimensional Imaging System using Organic Photorefractive Holography

Abstract

This paper discusses a coherence-gated three-dimensional imaging system based on photorefractive holography, which was applied to imaging through turbid media with a view to developing biomedical instrumentation. A rapid response photorefractive device doped with 2,4,7-trinitro-9-fluorenylidene malononitrile was used to generate the hologram grating. The estimated depth resolution was 20 µm, which corresponds to the coherence length of the light source. In this coherence imaging system, tomographic imaging of a 3-dimensional object composed of a 50 µm thick cylindrical layer was achieved. The proposed coherence imaging system using an organic photorefractive material can be used as an optical tomography system for biological applications

Organic Optoelectronic Materials: Mechanisms and Applications

“…Applications of PR materials include holographic 3D displays, , image processors (amplifiers, novelty filters, optical correlators), − imaging through turbid medium (including coherence-gated holographic imaging for medical applications), ,− phase conjugation, optical limiting, noncontact surface defect control, , optical waveguiding, − temporal characterization of ultrafast pulses, and many others . Comprehensive discussions of earlier work can be found in refs , , and .…”

Off-Resonance Photosensitization of a Photorefractive Polymer Composite Using PbS Nanocrystals

“…Because of their compositional flexibility, performance, and low cost, polymer-based photorefractive (PR) composites are potentially suitable for an array of real-time optical information processing applications. − Accordingly, there has been a significant effort to develop these composites, resulting in millisecond response times and nearly 100% diffraction efficiencies . In addition to these notable figures of merit, this class of materials is also appealing because the components may be separately modified, allowing the resulting composite to be customized for a particular application.…”

Enhanced photorefractive performance of polymeric composites through surface plasmon effects of gold nanoparticles

“…Three-dimensional (3D) image processing and displays have recently received much attention in the research field of information technology [1][2][3][4]. Among various techniques and materials that have been studied for the 3D displays, the holography based on photorefractive (PR) materials is considered to be one of the most promising techniques because it is not only capable of reproducing high-quality images without any special eyewear but also applicable to dynamic image processing devices.…”