Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics
The resolution performance of mobile phone camera optics was previously checked only near an infinite point. However, near-field performance is required because of reduced camera pixel sizes. Traditional optics are measured using a resolution chart located at a hyperfocal distance, which can only me...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/8/3350 |
| _version_ | 1797538382064123904 |
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| author | Hojong Choi Se-woon Choe Jaemyung Ryu |
| author_facet | Hojong Choi Se-woon Choe Jaemyung Ryu |
| author_sort | Hojong Choi |
| collection | DOAJ |
| description | The resolution performance of mobile phone camera optics was previously checked only near an infinite point. However, near-field performance is required because of reduced camera pixel sizes. Traditional optics are measured using a resolution chart located at a hyperfocal distance, which can only measure the resolution at a specific distance but not at close distances. We designed a new collimator system that can change the virtual image of the resolution chart from infinity to a short distance. Hence, some lenses inside the collimator systems must be moved. Currently, if the focusing lens is moved, chromatic aberration and field curvature occur. Additional lenses are required to correct this problem. However, the added lens must not change the characteristics of the proposed collimator. Therefore, an equivalent-lens conversion method was designed to maintain the first-order and Seidel aberrations. The collimator system proposed in this study does not move or change the resolution chart. |
| first_indexed | 2024-03-10T12:29:45Z |
| format | Article |
| id | doaj.art-3b084a27a06d45e4929b2fd459b1c762 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:29:45Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3b084a27a06d45e4929b2fd459b1c7622023-11-21T14:42:25ZengMDPI AGApplied Sciences2076-34172021-04-01118335010.3390/app11083350Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera OpticsHojong Choi0Se-woon Choe1Jaemyung Ryu2Department of Medical IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 39253, KoreaDepartment of Medical IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 39253, KoreaDepartment of Optical Engineering, Kumoh National Institute of Technology, Gumi 39253, KoreaThe resolution performance of mobile phone camera optics was previously checked only near an infinite point. However, near-field performance is required because of reduced camera pixel sizes. Traditional optics are measured using a resolution chart located at a hyperfocal distance, which can only measure the resolution at a specific distance but not at close distances. We designed a new collimator system that can change the virtual image of the resolution chart from infinity to a short distance. Hence, some lenses inside the collimator systems must be moved. Currently, if the focusing lens is moved, chromatic aberration and field curvature occur. Additional lenses are required to correct this problem. However, the added lens must not change the characteristics of the proposed collimator. Therefore, an equivalent-lens conversion method was designed to maintain the first-order and Seidel aberrations. The collimator system proposed in this study does not move or change the resolution chart.https://www.mdpi.com/2076-3417/11/8/3350collimation systemconvertor systemmobile opticsphone camera optics |
| spellingShingle | Hojong Choi Se-woon Choe Jaemyung Ryu Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics Applied Sciences collimation system convertor system mobile optics phone camera optics |
| title | Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics |
| title_full | Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics |
| title_fullStr | Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics |
| title_full_unstemmed | Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics |
| title_short | Optical Design of a Novel Collimator System with a Variable Virtual-Object Distance for an Inspection Instrument of Mobile Phone Camera Optics |
| title_sort | optical design of a novel collimator system with a variable virtual object distance for an inspection instrument of mobile phone camera optics |
| topic | collimation system convertor system mobile optics phone camera optics |
| url | https://www.mdpi.com/2076-3417/11/8/3350 |
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