A tunable 3D optical diffraction tomography system with high measurement accuracy

2019 ◽  
Author(s):  
Xing Lv ◽  
Shuo Cao ◽  
Mi Li ◽  
Guanghui Wang ◽  
Jiabi Chen
Keyword(s):  
Measurement Accuracy ◽  
Optical Diffraction ◽  
Diffraction Tomography ◽  
Optical Diffraction Tomography ◽  
Tomography System ◽  
High Measurement ◽  
High Measurement Accuracy

Total-shear grating based optical diffraction tomography

2021 ◽  
Author(s):  
Piotr Zdańkowski ◽  
Julianna Winnik ◽  
Paweł Gocłowski ◽  
Maciej Trusiak
Keyword(s):  
Optical Diffraction ◽  
Diffraction Tomography ◽  
Optical Diffraction Tomography ◽  
Total Shear

Optic Method to Measure the Density of Gas and the Analysis on Uncertainty of Measurement

2011 ◽  
Vol 361-363 ◽  
pp. 226-231
Author(s):  
Chang Li Guo ◽  
Yan Qing Zhang
Keyword(s):  
Refractive Index ◽  
Measurement Accuracy ◽  
Uncertainty Of Measurement ◽  
Interference Theory ◽  
Interference Fringes ◽  
Air Chamber ◽  
High Measurement ◽  
Wedge Structure ◽  
High Measurement Accuracy ◽  
Optical Wedge

A optic method to measure the density of gas is put forward. That is, by using the optical Wedge structure to build air chamber and chamber for gas under test, and by measuring the differences of the optical Wedge interference fringes of the two rooms, the density of gas has been measured. The interference theory of Wedge has been theoretical analyzed, and a formula which can be used to measure the refractive index of gas is put forward, and the uncertainty of the measurement has been analyzed. The parameters of gas density, refractive index and gas thickness have been used in the formula. The results show that the method of optical Wedge interference is practical, and high measurement accuracy is achievement when the density of gas is high.

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