Fabrication and testing of micro imaging lens
Microlens is increasingly becoming an important part of the medical industry. It can be attached to a fiber optic in order to improve the resolution of images as compared to just having the fiber optic alone. This project is a continuation of a previous study which focused on Poly(methyl...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/10356/53940 |
| _version_ | 1811678468720558080 |
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| author | Kuan, Nicodemus Jinwei. |
| author2 | Tor Shu Beng |
| author_facet | Tor Shu Beng Kuan, Nicodemus Jinwei. |
| author_sort | Kuan, Nicodemus Jinwei. |
| collection | NTU |
| description | Microlens is increasingly becoming an important part of the medical industry. It can be
attached to a fiber optic in order to improve the resolution of images as compared to
just having the fiber optic alone.
This project is a continuation of a previous study which focused on Poly(methyl
methacrylate) ‐ PMMA and Zeonor 1060R – ZNR in the fabrication of the microlens. This
project shall focus on the use of Topas COC 5013L‐10.
After a series of DOE trials, optimal fabrication parameters for Topas lens was
determined to be : Molding temperature at 115°C, demolding temperature at 35°C and
holding time of 60s. Signal‐to‐noise ratio data revealed that demolding temperature had
the most significant impact on the surface roughness of the lens. In the batches
produced, the average radius of curvature did not differ significantly and focal length
between theoretical and actual was also comparable.
Improvement of resolution was also seen when the lens was attached, with the ability to
resolve group 4 element 1 images using the 1951 USAF resolution test chart.
A final comparison was also made between the 3 different materials namely – PMMA, ZNR
and Topas.
The most significant result is the difference in focal spot size. PMMA gives us the
smallest spot size which means better ability to focus on small structures. The focal spot
size for ZNR is inconclusive due to the heavy spread of light at the 1/e2 value. Also, the
temperature difference shows us that Topas has the lowest change and can be
considered the most energy efficient material for fabrication. All other parameters such
as radius of curvature and resolution can be considered to be similar. |
| first_indexed | 2024-10-01T02:53:45Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/53940 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:53:45Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/539402023-03-04T18:23:11Z Fabrication and testing of micro imaging lens Kuan, Nicodemus Jinwei. Tor Shu Beng School of Mechanical and Aerospace Engineering DRNTU::Engineering Microlens is increasingly becoming an important part of the medical industry. It can be attached to a fiber optic in order to improve the resolution of images as compared to just having the fiber optic alone. This project is a continuation of a previous study which focused on Poly(methyl methacrylate) ‐ PMMA and Zeonor 1060R – ZNR in the fabrication of the microlens. This project shall focus on the use of Topas COC 5013L‐10. After a series of DOE trials, optimal fabrication parameters for Topas lens was determined to be : Molding temperature at 115°C, demolding temperature at 35°C and holding time of 60s. Signal‐to‐noise ratio data revealed that demolding temperature had the most significant impact on the surface roughness of the lens. In the batches produced, the average radius of curvature did not differ significantly and focal length between theoretical and actual was also comparable. Improvement of resolution was also seen when the lens was attached, with the ability to resolve group 4 element 1 images using the 1951 USAF resolution test chart. A final comparison was also made between the 3 different materials namely – PMMA, ZNR and Topas. The most significant result is the difference in focal spot size. PMMA gives us the smallest spot size which means better ability to focus on small structures. The focal spot size for ZNR is inconclusive due to the heavy spread of light at the 1/e2 value. Also, the temperature difference shows us that Topas has the lowest change and can be considered the most energy efficient material for fabrication. All other parameters such as radius of curvature and resolution can be considered to be similar. Bachelor of Engineering (Mechanical Engineering) 2013-06-10T06:41:55Z 2013-06-10T06:41:55Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/53940 en Nanyang Technological University 53 p. application/pdf |
| spellingShingle | DRNTU::Engineering Kuan, Nicodemus Jinwei. Fabrication and testing of micro imaging lens |
| title | Fabrication and testing of micro imaging lens |
| title_full | Fabrication and testing of micro imaging lens |
| title_fullStr | Fabrication and testing of micro imaging lens |
| title_full_unstemmed | Fabrication and testing of micro imaging lens |
| title_short | Fabrication and testing of micro imaging lens |
| title_sort | fabrication and testing of micro imaging lens |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/53940 |
| work_keys_str_mv | AT kuannicodemusjinwei fabricationandtestingofmicroimaginglens |