Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames
Snapshot multispectral imaging of chemical species in the flame is essential for improved understanding of the combustion process. In this article, we investigate the different configurations of a structured laser sheet-based multispectral imaging approach called the Frequency Recognition Algorithm...
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MDPI AG
2024-02-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/2/144 |
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| author | Devashish Chorey Prasad Boggavarapu Devendra Deshmukh Ravikrishna Rayavarapu Yogeshwar Nath Mishra |
| author_facet | Devashish Chorey Prasad Boggavarapu Devendra Deshmukh Ravikrishna Rayavarapu Yogeshwar Nath Mishra |
| author_sort | Devashish Chorey |
| collection | DOAJ |
| description | Snapshot multispectral imaging of chemical species in the flame is essential for improved understanding of the combustion process. In this article, we investigate the different configurations of a structured laser sheet-based multispectral imaging approach called the Frequency Recognition Algorithm for Multiple Exposures (FRAME). Using FRAME, a snapshot of Laser-Induced Fluorescence (LIF) of Polycyclic Aromatic Hydrocarbons (PAH) excited by 283.5 nm laser and Laser-Induced Incandescence (LII) of soot particles excited by 532 nm laser are acquired simultaneously on a single FRAME image. A laminar diffusion flame of acetylene produced by a Gülder burner is used for the experiments. The standard FRAME approach is based on creating two spatially modulated laser sheets and arranging them in a cross-patterned configuration (X). However, the effect of using different configurations (angles) of the two laser sheets on the multispectral planar imaging of the flame has not yet been studied. Therefore, we have compared the FRAME approach in four different configurations while keeping the same flame conditions. First, we have compared the relation between laser fluence and LII signals with and without spatial modulation of the 532 nm laser sheet and found that both detections follow the same curve. When comparing the maps of flame species reconstructed from the standard FRAME configuration and other configurations, there are some dissimilarities. These differences are attributed to minor changes in the imaging plane, optical alignment, laser path length, different modulation frequencies of the laser sheet, laser extinction, laser fluence, etc. |
| first_indexed | 2024-03-07T22:16:32Z |
| format | Article |
| id | doaj.art-0bc089f4f76a4ccf868589e6befd5543 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-07T22:16:32Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-0bc089f4f76a4ccf868589e6befd55432024-02-23T15:31:39ZengMDPI AGPhotonics2304-67322024-02-0111214410.3390/photonics11020144Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of FlamesDevashish Chorey0Prasad Boggavarapu1Devendra Deshmukh2Ravikrishna Rayavarapu3Yogeshwar Nath Mishra4Department of Mechanical Engineering, Indian Institute of Technology, Indore 453552, IndiaDepartment of Mechanical Engineering, Indian Institute of Science, Bangalore 560012, IndiaDepartment of Mechanical Engineering, Indian Institute of Technology, Indore 453552, IndiaDepartment of Mechanical Engineering, Indian Institute of Science, Bangalore 560012, IndiaDepartment of Mechanical Engineering, Indian Institute of Technology, Indore 453552, IndiaSnapshot multispectral imaging of chemical species in the flame is essential for improved understanding of the combustion process. In this article, we investigate the different configurations of a structured laser sheet-based multispectral imaging approach called the Frequency Recognition Algorithm for Multiple Exposures (FRAME). Using FRAME, a snapshot of Laser-Induced Fluorescence (LIF) of Polycyclic Aromatic Hydrocarbons (PAH) excited by 283.5 nm laser and Laser-Induced Incandescence (LII) of soot particles excited by 532 nm laser are acquired simultaneously on a single FRAME image. A laminar diffusion flame of acetylene produced by a Gülder burner is used for the experiments. The standard FRAME approach is based on creating two spatially modulated laser sheets and arranging them in a cross-patterned configuration (X). However, the effect of using different configurations (angles) of the two laser sheets on the multispectral planar imaging of the flame has not yet been studied. Therefore, we have compared the FRAME approach in four different configurations while keeping the same flame conditions. First, we have compared the relation between laser fluence and LII signals with and without spatial modulation of the 532 nm laser sheet and found that both detections follow the same curve. When comparing the maps of flame species reconstructed from the standard FRAME configuration and other configurations, there are some dissimilarities. These differences are attributed to minor changes in the imaging plane, optical alignment, laser path length, different modulation frequencies of the laser sheet, laser extinction, laser fluence, etc.https://www.mdpi.com/2304-6732/11/2/144structured illuminationmultispectral imagingcombustion diagnosticslaser-induced incandescencesimultaneous imaginglaser-induced fluorescence |
| spellingShingle | Devashish Chorey Prasad Boggavarapu Devendra Deshmukh Ravikrishna Rayavarapu Yogeshwar Nath Mishra Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames Photonics structured illumination multispectral imaging combustion diagnostics laser-induced incandescence simultaneous imaging laser-induced fluorescence |
| title | Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames |
| title_full | Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames |
| title_fullStr | Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames |
| title_full_unstemmed | Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames |
| title_short | Comparison between Different Optical Configurations of Active-FRAME Setup in Multispectral Imaging of Flames |
| title_sort | comparison between different optical configurations of active frame setup in multispectral imaging of flames |
| topic | structured illumination multispectral imaging combustion diagnostics laser-induced incandescence simultaneous imaging laser-induced fluorescence |
| url | https://www.mdpi.com/2304-6732/11/2/144 |
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