...Peng Xue; Jie Zheng; Yue Xu; Haiyang Bao; Rui Zhang Purpose This study aims to analyze the transmission characteristics of a long-period grating (LPG) fabricated on plastic optical fibers (POFs) and its refractive index (RI) sensing. Design/methodology/approach The geometric optic method...

...Adel Abdallah; Mohamed M. Fouad; Hesham N. Ahmed Purpose The purpose of this paper is to introduce a novel intensity-modulated fiber optic sensor for real-time intrusion detection using a fiber-optic microbend sensor and an optical time-domain reflectometer (OTDR). Design/methodology/approach...

...Jianxing Gu; Chen Yu; ZhenZe Yang; Peng Xue; Ning Jing; Saimei Yan Purpose This study aims to optimize the structure of gold-sputtered U-shaped plastic fiber sensors. Design/methodology/approach A group of U-shaped Au-sputtered plastic optical fiber sensing probes with polishing angles of 45...

... and ε_yy (y) is the strain distribution on the FBG, p₁₁ and p₁₂ are coefficients of the stress-optic tensor. Pereira G proposed the non-uniform strain along the approximate grating effect on the FBG grating that was subject to stress fields at both parallel...

...Wei Wei; Jun Chang; Qingjie Huang; Qiang Wang; Yuanyuan Liu; Zengguang Qin Purpose As measurement results of optical gas sensors are constantly affected by the pressure of a target gas, approaches must be taken to modify the results. The purpose of this paper is to compare the traditional...

...@njau.edu.cn © Emerald Group Publishing Limited 2016 Agriculture Calibration Optical Crop nitrogen sensor Standard gray plate Standard detector Nitrogen plays an important role in crop growth and yield quality. Rapid and accurate detection, scientific and rational diagnosis, as well...

.... In this paper the principles and characteristics of conventional optical tooling, electronic triangulation, electronic trilateration, photogrammetry, laser trackers, and laser scanners are reviewed. Other requirements for space and sight are similar to electronic triangulation. It is also necessary...

... MEMS optical Keywords: MEMS, optical Colibrys SA and Coventor, Inc. have announced that they have entered into Joint Development and Preferred Manufacturing Partnership agreements for the development of micro-electro-mechanical systems (MEMS). The relationship will provide one...

... © MCB UP Limited 2002 --> Distance Optical Keywords: Distance, Optical With a resolution of 0.01 µm and a 2400 per second sample speed,Keyence's new range of high-speed, high-accuracy intelligent micrometers is a breakthrough in optical technology (Plate 6...