scholarly journals The Young Interferometer as an Optical System for a Variable Depolarizer Characterization

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3037 ◽  
Author(s):  
Aleksandra Kalbarczyk ◽  
Leszek R. Jaroszewicz ◽  
Noureddine Bennis ◽  
Monika Chrusciel ◽  
Pawel Marc
Keyword(s):  
Real Time ◽  
Optical System ◽  
Biological Tissue ◽  
Interferometric Method ◽  
Vertically Aligned ◽  
System Information ◽  
Polarization Phenomena

This article proposes an interferometric method for a variable depolarizer characterization with features that distinguish it from the polarimetric system. Information about the behavior of a vertically aligned nematic cell as a variable depolarizer can be extracted from Young interferometer measurements in real time. These results could be significant for understanding the polarization phenomena in depolarizing media such as biological tissue.

Real-time superresolution optical system using multiple lasers and a TV system

1976 ◽  
Vol 15 (4) ◽  
pp. 851
Author(s):  
Takuso Sato ◽  
Mitsuhiro Ueda ◽  
Ichiro Ogasawara
Keyword(s):  
Real Time ◽  
Optical System

scholarly journals Real-time measurement of diffusion exchange rate in biological tissue

2020 ◽  
Vol 317 ◽  
pp. 106782
Author(s):  
Nathan H. Williamson ◽  
Rea Ravin ◽  
Teddy X. Cai ◽  
Dan Benjamini ◽  
Melanie Falgairolle ◽  
...  
Keyword(s):  
Exchange Rate ◽  
Real Time ◽  
Biological Tissue ◽  
Time Measurement ◽  
Real Time Measurement

Pseudo-Color Coded Optical System Based on the Spatial Light Modulator and Charge-Coupled Device

2012 ◽  
Author(s):  
S. N. Zhao ◽  
H. Chang ◽  
J. Wei ◽  
Z. Wei
Keyword(s):  
Real Time ◽  
Optical System ◽  
Spatial Light Modulator ◽  
Processing System ◽  
Optical Processing ◽  
Gray Scale ◽  
Light Modulator ◽  
Time Modulation ◽  
Gray Scale Image ◽  
Pseudo Color

A new pseudo-color coded optical system based on the liquid crystal spatial light modulator (LC-SLM) and a digital camera (CCD) is proposed. The SLM is used to replace the holographic grating with gray-scale image information, a gray-scale image in real-time modulation methods is proposed by synthesizing phase hologram and Ronchi grating, combined with the 4f coherent optical processing system and spatial filtering. For the high resolution gray image processed with existing digital pseudo-color method, the color sensitivity is low, algorithm is very complex. For traditional optical pseudo-color method, the gray scale image needs chemical pretreatment. The process is complex and time-consuming, and the real-time modulation could not be achieved. Our new method has enhanced the flexibility and adaptability of the optical pseudo-color, and give full play to the high sensitivity, high-capacity, rich colors and other features of the optical processing mode. At the same time, it overcomes the disadvantages of pure optical system which could not perform real-time processing. Therefore, it can be widely used in the field of remote sensing, biomedical, environmental monitoring, public security and criminal investigation, etc.

A simple optical system for real-time size measurements of TRISO fuel pellets

2005 ◽  
Author(s):  
Thomas P. Karnowski ◽  
Andrew K. Kercher ◽  
John D. Hunn ◽  
L. Curt Maxey
Keyword(s):  
Real Time ◽  
Optical System ◽  
Triso Fuel ◽  
Fuel Pellets

A Sample-to-Answer Compact Optical System for On-Site Detection of Candidatus Liberibacter Asiaticus

2021 ◽  
Vol 64 (1) ◽  
pp. 95-102
Author(s):  
Cui Wu ◽  
Zhen Wang ◽  
Hui Wu ◽  
Zhan Lu ◽  
Cheng Qian ◽  
...  
Keyword(s):  
Low Temperature ◽  
Real Time ◽  
Optical System ◽  
Power Supply ◽  
Integrated System ◽  
Candidatus Liberibacter Asiaticus ◽  
Field Detection ◽  
Candidatus Liberibacter ◽  
3D Printed ◽  
Liberibacter Asiaticus

HighlightsA portable system based on real-time fluorescence analysis was developed for field detection of Candidatus Liberibacter asiaticus within 40 min from sample to answer.A smartphone-assisted device was designed for easy operation, reliable nucleic acid amplification, and highly sensitive fluorescence detection, with sensitivity comparable to that of a commercial instrument.A novel homemade 3D printed box was used for in-field reagent storage, and it could maintain low temperature (<4°C) for about 8 hours without power supply.This fully integrated system is stable, easy to use, inexpensive, and has great application prospects in resource-limited areas.Abstract. Candidatus Liberibacter asiaticus (Las) is a main causal agent of huanglongbing (HLB), a destructive disease that has greatly reduced citrus yields and quality. Instruments with high sensitivity and portability are urgently required for on-site testing. In this study, a novel sample-to-answer optical system for on-site detection of Las was developed. Three major functions, including DNA extraction, amplification, and detection, are integrated into a portable case. This system mainly consists of (1) a specially designed 3D printed box for on-site reagent storage that can maintain low temperature (below 4°C) for 7.5 h at ambient temperature (35°C); (2) a custom device, called the IF-Device, for DNA amplification and detection of HLB, with an optimized optical structure, a sensitive signal processing circuit, and a precise temperature control algorithm with an accuracy of ±0.1°C; and (3) a battery-based power supply for the whole system. In a typical test using sodium fluorescein as a standard model, the results showed that the sensitivity of this system (1.0 nM) could easily meet the requirements of fluorescence biosensors. The feasibility of this homemade system was evaluated with samples extracted from infected citrus leaves based on the loop-mediated isothermal amplification (LAMP) method, and the limit of detection (LOD) was approximately 1.0 × 10-4 ng µL-1. The whole detection process for eight samples could be simultaneously accomplished within 40 min, and the results could be displayed on a smartphone in real-time. Moreover, the portable case is anti-interference, low cost, and only 2 kg in weight. Considering its sensitivity, stability, and portability, this highly integrated system possesses promising prospects for in-field detection. Keywords: Field detection, Fluorescence biosensor, Huanglongbing, Isothermal amplification, Sample-to-answer.

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