Depth extension and sidelobe suppression in optical coherence tomography using pupil filters
We demonstrate a new focus engineering scheme to achieve both extended depth of focus (DOF) and sidelobe suppression in spectral-domain optical coherence tomography (SD-OCT) system. Each of the illumination pupil function and the detection pupil function is modulated using an annular pupil filter im...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/107114 http://hdl.handle.net/10220/25251 http://dx.doi.org/10.1364/OE.22.026956 |
| _version_ | 1826109907880902656 |
|---|---|
| author | Gu, Jun Cui, Dongyao Wu, Junying Yu, Xiaojun Liu, Xinyu Liu, Linbo |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Gu, Jun Cui, Dongyao Wu, Junying Yu, Xiaojun Liu, Xinyu Liu, Linbo |
| author_sort | Gu, Jun |
| collection | NTU |
| description | We demonstrate a new focus engineering scheme to achieve both extended depth of focus (DOF) and sidelobe suppression in spectral-domain optical coherence tomography (SD-OCT) system. Each of the illumination pupil function and the detection pupil function is modulated using an annular pupil filter implemented by center obscuration. The two pupil filters are arranged in a dark-field configuration such that the first sidelobe of the illumination point-spread function (PSF) matches the first minimum of the detection PSF in the lateral focal plane. We tested the feasibility of the proposed scheme numerically, and then constructed a dark-field OCT (DF-OCT) system to further verify its effectiveness experimentally. Simulation results show that a DOF gain of 4.2 can be achieved compared with a full aperture OCT (FA-OCT) system, with a suppression ratio of 2.9 dB for the first sidelobe compared with an annular-aperture bright-field OCT (BF-OCT) system. Experimental results show that the constructed DF-OCT extends the DOF by three-fold compared with the constructed FA-OCT, and suppresses the first sidelobe by 3.1 dB compared with the BF-OCT. The penalty for the extended DOF is an ~11.6 dB drop in sensitivity compared with the FA-OCT system. |
| first_indexed | 2024-10-01T02:25:47Z |
| format | Journal Article |
| id | ntu-10356/107114 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:25:47Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1071142019-12-06T22:25:01Z Depth extension and sidelobe suppression in optical coherence tomography using pupil filters Gu, Jun Cui, Dongyao Wu, Junying Yu, Xiaojun Liu, Xinyu Liu, Linbo School of Chemical and Biomedical Engineering School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics We demonstrate a new focus engineering scheme to achieve both extended depth of focus (DOF) and sidelobe suppression in spectral-domain optical coherence tomography (SD-OCT) system. Each of the illumination pupil function and the detection pupil function is modulated using an annular pupil filter implemented by center obscuration. The two pupil filters are arranged in a dark-field configuration such that the first sidelobe of the illumination point-spread function (PSF) matches the first minimum of the detection PSF in the lateral focal plane. We tested the feasibility of the proposed scheme numerically, and then constructed a dark-field OCT (DF-OCT) system to further verify its effectiveness experimentally. Simulation results show that a DOF gain of 4.2 can be achieved compared with a full aperture OCT (FA-OCT) system, with a suppression ratio of 2.9 dB for the first sidelobe compared with an annular-aperture bright-field OCT (BF-OCT) system. Experimental results show that the constructed DF-OCT extends the DOF by three-fold compared with the constructed FA-OCT, and suppresses the first sidelobe by 3.1 dB compared with the BF-OCT. The penalty for the extended DOF is an ~11.6 dB drop in sensitivity compared with the FA-OCT system. NRF (Natl Research Foundation, S’pore) Accepted version 2015-03-23T07:04:11Z 2019-12-06T22:25:01Z 2015-03-23T07:04:11Z 2019-12-06T22:25:01Z 2014 2014 Journal Article Yu, X., Liu, X., Gu, J., Cui, D., Wu, J., Liu, L. (2014). Depth extension and sidelobe suppression in optical coherence tomography using pupil filters. Optics express, 22(22), 26956-26966. 1094-4087 https://hdl.handle.net/10356/107114 http://hdl.handle.net/10220/25251 http://dx.doi.org/10.1364/OE.22.026956 en Optics express © 2014 Optical Society of America. This is the author created version of a work that has been peer reviewed and accepted for publication by Optics Express, Optical Society of America. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1364/OE.22.026956]. 11 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Gu, Jun Cui, Dongyao Wu, Junying Yu, Xiaojun Liu, Xinyu Liu, Linbo Depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| title | Depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| title_full | Depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| title_fullStr | Depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| title_full_unstemmed | Depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| title_short | Depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| title_sort | depth extension and sidelobe suppression in optical coherence tomography using pupil filters |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics |
| url | https://hdl.handle.net/10356/107114 http://hdl.handle.net/10220/25251 http://dx.doi.org/10.1364/OE.22.026956 |
| work_keys_str_mv | AT gujun depthextensionandsidelobesuppressioninopticalcoherencetomographyusingpupilfilters AT cuidongyao depthextensionandsidelobesuppressioninopticalcoherencetomographyusingpupilfilters AT wujunying depthextensionandsidelobesuppressioninopticalcoherencetomographyusingpupilfilters AT yuxiaojun depthextensionandsidelobesuppressioninopticalcoherencetomographyusingpupilfilters AT liuxinyu depthextensionandsidelobesuppressioninopticalcoherencetomographyusingpupilfilters AT liulinbo depthextensionandsidelobesuppressioninopticalcoherencetomographyusingpupilfilters |