Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.01252 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916379206090752 |
|---|---|
| author | Gu, Chengfu Zhang, Haoran Lan, Qi Zhang, Weiyi Liu, Chang Yang, Jianlong |
| author_facet | Gu, Chengfu Zhang, Haoran Lan, Qi Zhang, Weiyi Liu, Chang Yang, Jianlong |
| contents | Fiber-form optics extends the high-resolution tomographic imaging capabilities of Optical Coherence Tomography (OCT) to the inside of the human body, i.e., endoscopic OCT. However, it still faces challenges due to the trade-off between probe size, resolution, and Depth Of Focus (DOF). Here we introduce a method for extending the DOF in endoscopic OCT with high uniformity and efficiency. On the basis of multi-level diffractive optics, we leverage the multi-dimensional light field modulation capabilities of Computer-Generated Holography (CGH), to achieve precise control of the intensity distribution of the off-axis portion of the OCT probe light. Our method eliminates the need for an objective lens, allowing for direct fabrication at the distal facet of a single-mode fiber using femtosecond laser two-photon 3D printing. The superiority of our method has been verified through numerical simulation, beam measurement, and imaging results obtained with our home-built endoscopic OCT system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01252 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Computer-generated holography enables high-uniformity, high-efficiency depth-of-focus extension in endoscopic OCT Gu, Chengfu Zhang, Haoran Lan, Qi Zhang, Weiyi Liu, Chang Yang, Jianlong Optics Fiber-form optics extends the high-resolution tomographic imaging capabilities of Optical Coherence Tomography (OCT) to the inside of the human body, i.e., endoscopic OCT. However, it still faces challenges due to the trade-off between probe size, resolution, and Depth Of Focus (DOF). Here we introduce a method for extending the DOF in endoscopic OCT with high uniformity and efficiency. On the basis of multi-level diffractive optics, we leverage the multi-dimensional light field modulation capabilities of Computer-Generated Holography (CGH), to achieve precise control of the intensity distribution of the off-axis portion of the OCT probe light. Our method eliminates the need for an objective lens, allowing for direct fabrication at the distal facet of a single-mode fiber using femtosecond laser two-photon 3D printing. The superiority of our method has been verified through numerical simulation, beam measurement, and imaging results obtained with our home-built endoscopic OCT system. |
| title | Computer-generated holography enables high-uniformity, high-efficiency depth-of-focus extension in endoscopic OCT |
| topic | Optics |
| url | https://arxiv.org/abs/2409.01252 |