Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection
Field-portable observation and analysis of particulate matter (PM) is required to enhance healthy lives. Various types of the PM measurement methods are in use; however, each of these methods has significant limitations in that real time measurement is impossible, the detection system is bulky, or t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/8/2745 |
| _version_ | 1797537787691401216 |
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| author | Haechang Yang Sanghoon Shin Dongmin Seo Jaewon Park Sungkyu Seo |
| author_facet | Haechang Yang Sanghoon Shin Dongmin Seo Jaewon Park Sungkyu Seo |
| author_sort | Haechang Yang |
| collection | DOAJ |
| description | Field-portable observation and analysis of particulate matter (PM) is required to enhance healthy lives. Various types of the PM measurement methods are in use; however, each of these methods has significant limitations in that real time measurement is impossible, the detection system is bulky, or the measurement accuracy is insufficient. In this work, we introduce an optical method to perform a fast and accurate PM analysis with a higher-contrast microscopic image enabled by a side-illuminated total internal reflection (TIR) technique to be implemented in a compact device. The superiority of the proposed method was quantitatively demonstrated by comparing the signal-to-noise ratio of the proposed side-illuminated TIR method with a traditional halogen lamp-based transmission microscope. With the proposed device, signal-to-noise ratios (SNRs) for microbeads (5~20 µm) and ultrafine dust particles (>5 µm) increased 4.5~17 and 4~10 dB, respectively, compared to the conventional transmission microscope. As a proof of concept, the proposed method was also applied to a low-cost commercial smartphone toy microscope enabling field-portable detection of PMs. We believe that the proposed side-illuminated TIR PM detection device holds significant advantages over other commonly used systems due to its sufficient detection capability along with simple and compact configuration as well as low cost. |
| first_indexed | 2024-03-10T12:21:13Z |
| format | Article |
| id | doaj.art-667a317d846043d296dc5bbe2d43b7b8 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T12:21:13Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-667a317d846043d296dc5bbe2d43b7b82023-11-21T15:26:12ZengMDPI AGSensors1424-82202021-04-01218274510.3390/s21082745Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal ReflectionHaechang Yang0Sanghoon Shin1Dongmin Seo2Jaewon Park3Sungkyu Seo4Department of Electronics and Information Engineering, Korea University, Sejong 30019, KoreaDepartment of Electronics and Information Engineering, Korea University, Sejong 30019, KoreaMaritime Safety Research Division, Korea Research Institute of Ships & Ocean Engineering, Daejeon 34103, KoreaSchool of Microelectronics, Southern University of Science and Technology, Shenzhen 518055, ChinaDepartment of Electronics and Information Engineering, Korea University, Sejong 30019, KoreaField-portable observation and analysis of particulate matter (PM) is required to enhance healthy lives. Various types of the PM measurement methods are in use; however, each of these methods has significant limitations in that real time measurement is impossible, the detection system is bulky, or the measurement accuracy is insufficient. In this work, we introduce an optical method to perform a fast and accurate PM analysis with a higher-contrast microscopic image enabled by a side-illuminated total internal reflection (TIR) technique to be implemented in a compact device. The superiority of the proposed method was quantitatively demonstrated by comparing the signal-to-noise ratio of the proposed side-illuminated TIR method with a traditional halogen lamp-based transmission microscope. With the proposed device, signal-to-noise ratios (SNRs) for microbeads (5~20 µm) and ultrafine dust particles (>5 µm) increased 4.5~17 and 4~10 dB, respectively, compared to the conventional transmission microscope. As a proof of concept, the proposed method was also applied to a low-cost commercial smartphone toy microscope enabling field-portable detection of PMs. We believe that the proposed side-illuminated TIR PM detection device holds significant advantages over other commonly used systems due to its sufficient detection capability along with simple and compact configuration as well as low cost.https://www.mdpi.com/1424-8220/21/8/2745particulate matter (PM)optical detectionside illuminationtotal internal reflection (TIR)field-portable microscope |
| spellingShingle | Haechang Yang Sanghoon Shin Dongmin Seo Jaewon Park Sungkyu Seo Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection Sensors particulate matter (PM) optical detection side illumination total internal reflection (TIR) field-portable microscope |
| title | Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection |
| title_full | Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection |
| title_fullStr | Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection |
| title_full_unstemmed | Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection |
| title_short | Detection of Particulate Matters with a Field-Portable Microscope Using Side-Illuminated Total Internal Reflection |
| title_sort | detection of particulate matters with a field portable microscope using side illuminated total internal reflection |
| topic | particulate matter (PM) optical detection side illumination total internal reflection (TIR) field-portable microscope |
| url | https://www.mdpi.com/1424-8220/21/8/2745 |
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