Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects
New variant of Background Oriented Schlieren (BOS) technique is proposed for the measurements of strongly refracting objects. The employed pattern presents a rectangular grid of color dots. Special color encoding makes every dot unique provided its nearest neighbors can be identified. This allows ro...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-05-01
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| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202723000824 |
| _version_ | 1797822066495324160 |
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| author | Nikolay A. Vinnichenko Angelina V. Andrianova Aleksei V. Pushtaev Yulia K. Rudenko Yulia Yu. Plaksina Alexander V. Uvarov |
| author_facet | Nikolay A. Vinnichenko Angelina V. Andrianova Aleksei V. Pushtaev Yulia K. Rudenko Yulia Yu. Plaksina Alexander V. Uvarov |
| author_sort | Nikolay A. Vinnichenko |
| collection | DOAJ |
| description | New variant of Background Oriented Schlieren (BOS) technique is proposed for the measurements of strongly refracting objects. The employed pattern presents a rectangular grid of color dots. Special color encoding makes every dot unique provided its nearest neighbors can be identified. This allows robust matching of the dot images for schlieren objects with arbitrary large apparent displacements. Also, possible formation of multiple images of the same dot due to strongly nonlinear variations of the refractive index can be used to improve the accuracy of the refractive index field measurement. Multi-frame approach is employed to improve the spatial resolution. Potential of the proposed technique is demonstrated by measurements of the diffusion layers in aqueous solutions of sodium chloride and ethanol. |
| first_indexed | 2024-03-13T10:02:21Z |
| format | Article |
| id | doaj.art-92b46ac9aa87449f8c3808f02a449660 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-03-13T10:02:21Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-92b46ac9aa87449f8c3808f02a4496602023-05-23T04:22:17ZengElsevierInternational Journal of Thermofluids2666-20272023-05-0118100364Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objectsNikolay A. Vinnichenko0Angelina V. Andrianova1Aleksei V. Pushtaev2Yulia K. Rudenko3Yulia Yu. Plaksina4Alexander V. Uvarov5Corresponding author.; Faculty of Physics, Lomonosov Moscow State University, Leninskiye Gory 1/2, Moscow 119991, RussiaFaculty of Physics, Lomonosov Moscow State University, Leninskiye Gory 1/2, Moscow 119991, RussiaFaculty of Physics, Lomonosov Moscow State University, Leninskiye Gory 1/2, Moscow 119991, RussiaFaculty of Physics, Lomonosov Moscow State University, Leninskiye Gory 1/2, Moscow 119991, RussiaFaculty of Physics, Lomonosov Moscow State University, Leninskiye Gory 1/2, Moscow 119991, RussiaFaculty of Physics, Lomonosov Moscow State University, Leninskiye Gory 1/2, Moscow 119991, RussiaNew variant of Background Oriented Schlieren (BOS) technique is proposed for the measurements of strongly refracting objects. The employed pattern presents a rectangular grid of color dots. Special color encoding makes every dot unique provided its nearest neighbors can be identified. This allows robust matching of the dot images for schlieren objects with arbitrary large apparent displacements. Also, possible formation of multiple images of the same dot due to strongly nonlinear variations of the refractive index can be used to improve the accuracy of the refractive index field measurement. Multi-frame approach is employed to improve the spatial resolution. Potential of the proposed technique is demonstrated by measurements of the diffusion layers in aqueous solutions of sodium chloride and ethanol.http://www.sciencedirect.com/science/article/pii/S2666202723000824Background Oriented SchlierenSynthetic schlierenM-arrayDot trackingDiffusion layer |
| spellingShingle | Nikolay A. Vinnichenko Angelina V. Andrianova Aleksei V. Pushtaev Yulia K. Rudenko Yulia Yu. Plaksina Alexander V. Uvarov Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects International Journal of Thermofluids Background Oriented Schlieren Synthetic schlieren M-array Dot tracking Diffusion layer |
| title | Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects |
| title_full | Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects |
| title_fullStr | Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects |
| title_full_unstemmed | Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects |
| title_short | Color-encoded M-array Background Oriented Schlieren for measurements of strongly refracting objects |
| title_sort | color encoded m array background oriented schlieren for measurements of strongly refracting objects |
| topic | Background Oriented Schlieren Synthetic schlieren M-array Dot tracking Diffusion layer |
| url | http://www.sciencedirect.com/science/article/pii/S2666202723000824 |
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