Design and high-throughput fabrication of custom phase-masks for lensless cameras

Kyung Chul Lee; Junghyun Bae; Nakkyu Baek; Jaewoo Jung; Wook Park; Seung Ah Lee

doi:10.1117/12.2609069

5 March 2022 Design and high-throughput fabrication of custom phase-masks for lensless cameras

Kyung Chul Lee, Junghyun Bae, Nakkyu Baek, Jaewoo Jung, Wook Park, Seung Ah Lee

Proceedings Volume PC12012, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XV; PC120120R (2022) https://doi.org/10.1117/12.2609069
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Lensless photography is a recently-developed computational imaging technique that uses light-modulating phase masks instead of lenses to build ultra-compact and low-cost cameras. Here, we propose a method to design and fabricate custom phase-masks to create deterministic point spread functions for lensless imaging. Phase-masks are designed using our wave-optics-based algorithm and are fabricated in single-shot via grayscale maskless lithography technique. Using this method, we can design and fabricate phase-masks with various surface profiles and have validated that the fabricated masks match the designed profiles. Our technique allows for a fast and efficient process that can be applied to the fab-level fabrication of lensless cameras for commercialization. We also show that lensless cameras using our custom phase-masks can effectively obtain images in a compact form factor.

Conference Presentation

Citation Download Citation

Kyung Chul Lee, Junghyun Bae, Nakkyu Baek, Jaewoo Jung, Wook Park, and Seung Ah Lee "Design and high-throughput fabrication of custom phase-masks for lensless cameras", Proc. SPIE PC12012, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XV, PC120120R (5 March 2022); https://doi.org/10.1117/12.2609069

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