Nondestructive measurement of refractive index of capillary in non-paraxial conditions
| Autor: | 翟影 Zhai Ying, 李强 Li Qiang, 普小云 Pu Xiaoyun, 杨瑞芬 Yang Rui-fen |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Accuracy and precision
Materials science business.industry Physics::Optics Atomic and Molecular Physics and Optics Collimated light Electronic Optical and Magnetic Materials Physics::Fluid Dynamics Spherical aberration Normalized frequency (fiber optics) Optics Oil immersion Focal length Step-index profile business Refractive index |
| Zdroj: | Optics and Precision Engineering. 21:616-623 |
| ISSN: | 1004-924X |
| DOI: | 10.3788/ope.20132103.0616 |
| Popis: | A new method to calculate the refractive index of a capillary wall simply and accurately was proposed to reduce the effects of the spherical aberration and the depth of field on measurement results under a non-paraxial condition.Firstly,two kinds of standard liquids with known refractive indexes were filled into a capillary,respectively,and the distance between two focal positions were measured when the collimated light passed through the capillary.Then,by using the formula of the refractive index of capillary wall and the focal length,the refractive index of the wall-material could be obtained.The experimental results indicate that the measurement accuracy of refractive index is better than 0.003 when the refractive index of wall-material is less than 1.51 in the proper inner and outer diameters of a capillary.It is demonstrated when two kinds of low(high) refractive index liquids are chosen as standard liquids,the measurement accuracy can be improved.The introduced method has a simpler calculation process and its measurement precision of refractive index meets the requirements of general scientific research. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|