Study on Measuring System of Automatic Image Alignment Refractive Index Based on New Mathematical Model

2014 ◽  
Vol 609-610 ◽  
pp. 1319-1323
Author(s):  
Qing Hua Yao ◽  
Miao Cao ◽  
Chang Liu
Keyword(s):  
Refractive Index ◽  
Optical Transmission ◽  
Optical Glass ◽  
Measuring System ◽  
Practical Significance ◽  
High Demand ◽  
Accuracy Measurement ◽  
General Instrument ◽  
Measurement Repeatability ◽  
High Accuracy Measurement

With the development of measuring technology,the measuring accuracy of optical glass refractive index of the increasingly high demand,V prism refractometers is major general instrument for measuring the refractive index of optical glass,not only the simple device,convenient measurement,and this method has high precision performance,however,the accuracy is only attained ,which in the regulation of national metrology verification and the introduction of V prism refractometers in the literature,the classic formula calculation principle formula error caused by refractive index has more than .Based on the mechanical structure and optical transmission to improve the original V prism refractometers the refractive index of air,by considering the influence on measurement precision of V prism refractometer,to mathematical modeling of V prism refractometer the principle formula,V can be measured refractive prism refractometer rate accuracy increased to ,measurement repeatability less than ,has important practical significance for realizing high accuracy measurement of the refractive index of optical glass.

Research on Liquid Concentration Real-Time Detecting System Based on F-P Interferometer

2006 ◽  
Vol 326-328 ◽  
pp. 143-146
Author(s):  
Wen Li Wei ◽  
Xiu Fang Yang
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Tracking System ◽  
High Accuracy ◽  
Light Wavelength ◽  
Accuracy Measurement ◽  
Liquid Concentration ◽  
Dynamic Tracking ◽  
Transparent Liquid ◽  
High Accuracy Measurement

A kind of dynamic tracking system for conducting high accuracy measurement of transparent liquid concentration is designed by means of line matrix CCD receiving fringes in accordance with the relations between liquid concentration and refractive index as well as the relations among refractive index, interference light wavelength of optical fiber F-P interferometer and grade orders. The detecting system can recognize or detect 0.01% of concentration variations via measuring a group of alcohol.

scholarly journals A Theoretical Study of Broadband Extraordinary Optical Transmission in Gold Plasmonic Square Nanohole Arrays and its Application on Refractive Index Sensor

2021 ◽  
Author(s):  
Rehan Shafiq ◽  
Javed Iqbal ◽  
Adnan Daud Khan ◽  
Anees Ur Rehman
Keyword(s):  
Refractive Index ◽  
Optical Transmission ◽  
Near Infrared ◽  
Contrast Ratio ◽  
Extraordinary Optical Transmission ◽  
Index Of Refraction ◽  
Practical Significance ◽  
Localized Surface Plasmon ◽  
Refractive Index Sensor ◽  
Plasmonic Sensor

Abstract Extraordinary optical transmission (EOT) behaviour is investigated in a subwavelength plasmonic nanostructure, consisting of a gold film perforated with a square nanohole array and deposited on a silicon dioxide substrate. The essential aspect of the proposed structure is the periodic disorder that enables broadband transmission peaks in the visible and near-infrared region and reduces the structure's size, which mainly arises from the excitation of localized surface plasmon resonances (LSPRs). Optical cavity modes formed in the nanoholes and the hybridization of plasmon modes. Further, the performance of the proposed nanostructure as a plasmonic sensor is analyzed by increasing the index of refraction of the local environment; the EOT exhibit remarkable refractive index sensitivity of up to 944 nm/RIU, a figure of merit of 9.25 and a contrast ratio of 47% are realized. The proposed structure has some practical significance for designing low-cost and effective sensing devices.

scholarly journals High-accuracy measurement system for the refractive index of air based on a simple double-beam interferometry

2021 ◽  
Vol 29 (2) ◽  
pp. 1396
Author(s):  
Hongtang Gao ◽  
Zhongyu Wang ◽  
Wei Zou ◽  
Yuzhang Liu ◽  
Shuanghua Sun
Keyword(s):  
Refractive Index ◽  
Measurement System ◽  
High Accuracy ◽  
Accuracy Measurement ◽  
Double Beam ◽  
High Accuracy Measurement

Optically Transparent Polymethyl Methacrylate Composites made with Glass Fibers of Varying Refractive Index

1997 ◽  
Vol 12 (4) ◽  
pp. 1091-1101 ◽  
Author(s):  
Seunggu Kang ◽  
Hongy Lin ◽  
Delbert E. Day ◽  
James O. Stoffer
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Refractive Index ◽  
Mechanical Strength ◽  
Glass Fiber ◽  
Polymethyl Methacrylate ◽  
Optical Transmission ◽  
Annealing Temperature ◽  
Glass Fibers ◽  
Optically Transparent

The dependence of the optical and mechanical properties of optically transparent polymethyl methacrylate (PMMA) composites on the annealing temperature of BK10 glass fibers was investigated. Annealing was used to modify the refractive index (R.I.) of the glass fiber so that it would more closely match that of PMMA. Annealing increased the refractive index of the fibers and narrowed the distribution of refractive index of the fibers, but lowered their mechanical strength so the mechanical properties of composites reinforced with annealed fibers were not as good as for composites containing as-pulled (chilled) glass fibers. The refractive index of as-pulled 17.1 μm diameter fibers (R.I. = 1.4907) increased to 1.4918 and 1.4948 after annealing at 350 °C to 500 °C for 1 h or 0.5 h, respectively. The refractive index of glass fibers annealed at 400 °C/1 h best matched that of PMMA at 589.3 nm and 25 °C, so the composite reinforced with those fibers had the highest optical transmission. Because annealed glass fibers had a more uniform refractive index than unannealed fibers, the composites made with annealed fibers had a higher optical transmission. The mechanical strength of annealed fiber/PMMA composites decreased as the fiber annealing temperature increased. A composite containing fibers annealed at 450 °C/1 h had a tensile strength 26% lower than that of a composite made with as-pulled fibers, but 73% higher than that for unreinforced PMMA. This decrease was avoided by treating annealed fibers with HF. Composites made with annealed and HF (10 vol. %)-treated (for 30 s) glass fibers had a tensile strength (∼200 MPa) equivalent to that of the composites made with as-pulled fibers. However, as the treatment time in HF increased, the tensile strength of the composites decreased because of a significant reduction in diameter of the glass fiber which reduced the volume percent fiber in the composite.

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