Unidirectional imaging with partially coherent light
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910670182678528 |
|---|---|
| author | Ma, Guangdong Shen, Che-Yung Li, Jingxi Huang, Luzhe Isil, Cagatay Ardic, Fazil Onuralp Yang, Xilin Li, Yuhang Wang, Yuntian Rahman, Md Sadman Sakib Ozcan, Aydogan |
| author_facet | Ma, Guangdong Shen, Che-Yung Li, Jingxi Huang, Luzhe Isil, Cagatay Ardic, Fazil Onuralp Yang, Xilin Li, Yuhang Wang, Yuntian Rahman, Md Sadman Sakib Ozcan, Aydogan |
| contents | Unidirectional imagers form images of input objects only in one direction, e.g., from field-of-view (FOV) A to FOV B, while blocking the image formation in the reverse direction, from FOV B to FOV A. Here, we report unidirectional imaging under spatially partially coherent light and demonstrate high-quality imaging only in the forward direction (A->B) with high power efficiency while distorting the image formation in the backward direction (B->A) along with low power efficiency. Our reciprocal design features a set of spatially engineered linear diffractive layers that are statistically optimized for partially coherent illumination with a given phase correlation length. Our analyses reveal that when illuminated by a partially coherent beam with a correlation length of ~1.5 w or larger, where w is the wavelength of light, diffractive unidirectional imagers achieve robust performance, exhibiting asymmetric imaging performance between the forward and backward directions - as desired. A partially coherent unidirectional imager designed with a smaller correlation length of less than 1.5 w still supports unidirectional image transmission, but with a reduced figure of merit. These partially coherent diffractive unidirectional imagers are compact (axially spanning less than 75 w), polarization-independent, and compatible with various types of illumination sources, making them well-suited for applications in asymmetric visual information processing and communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_05449 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unidirectional imaging with partially coherent light Ma, Guangdong Shen, Che-Yung Li, Jingxi Huang, Luzhe Isil, Cagatay Ardic, Fazil Onuralp Yang, Xilin Li, Yuhang Wang, Yuntian Rahman, Md Sadman Sakib Ozcan, Aydogan Optics Computer Vision and Pattern Recognition Applied Physics Unidirectional imagers form images of input objects only in one direction, e.g., from field-of-view (FOV) A to FOV B, while blocking the image formation in the reverse direction, from FOV B to FOV A. Here, we report unidirectional imaging under spatially partially coherent light and demonstrate high-quality imaging only in the forward direction (A->B) with high power efficiency while distorting the image formation in the backward direction (B->A) along with low power efficiency. Our reciprocal design features a set of spatially engineered linear diffractive layers that are statistically optimized for partially coherent illumination with a given phase correlation length. Our analyses reveal that when illuminated by a partially coherent beam with a correlation length of ~1.5 w or larger, where w is the wavelength of light, diffractive unidirectional imagers achieve robust performance, exhibiting asymmetric imaging performance between the forward and backward directions - as desired. A partially coherent unidirectional imager designed with a smaller correlation length of less than 1.5 w still supports unidirectional image transmission, but with a reduced figure of merit. These partially coherent diffractive unidirectional imagers are compact (axially spanning less than 75 w), polarization-independent, and compatible with various types of illumination sources, making them well-suited for applications in asymmetric visual information processing and communication. |
| title | Unidirectional imaging with partially coherent light |
| topic | Optics Computer Vision and Pattern Recognition Applied Physics |
| url | https://arxiv.org/abs/2408.05449 |