Fabrication of Integrated Lensless Cameras via UV-Imprint Lithography

We report on the construction of a lensless camera with a phase-modulating mask layer integrated directly on an image sensor using the UV-imprint lithography method. By replicating the master phase mask's surface structure directly on the image sensor, our method further simplifies the fabricat...

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Bibliographic Details
Published in:IEEE photonics journal 2022-04, Vol.14 (2), p.1-8
Main Authors: Lee, Yujin, Chae, Hyesuk, Lee, Kyung Chul, Baek, Nakkyu, Kim, Taeyoung, Jung, Jaewoo, Lee, Seung Ah
Format: Article
Language:English
Subjects:
Cameras
computational imaging
Digital imaging
Fabrication
fabrication method
Form factors
Glass
Image reconstruction
Image sensors
Imaging
Lensless imaging
Lithography
low-cost imaging device
Phase measurement
Prototypes
Surface structure
ultra-thin camera
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Summary:We report on the construction of a lensless camera with a phase-modulating mask layer integrated directly on an image sensor using the UV-imprint lithography method. By replicating the master phase mask's surface structure directly on the image sensor, our method further simplifies the fabrication of lensless cameras and delivers a rigid and durable device with a small form factor. Our prototype device has an open-faced design without any apertures and generates high-quality photographic reconstructions with high light collection efficiency. We analyze the performance of our prototype device and demonstrate various imaging applications, including the digital refocusing capabilities.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2022.3157373