Fourier DiffuserScope: single-shot 3D Fourier light field microscopy with a diffuser
Abstract
Light field microscopy (LFM) uses a microlens array (MLA) near the sensor plane of a microscope to achieve single-shot 3D imaging of a sample without any moving parts. Unfortunately, the 3D capability of LFM comes with a significant loss of lateral resolution at the focal plane. Placing the MLA near the pupil plane of the microscope, instead of the image plane, can mitigate the artifacts and provide an efficient forward model, at the expense of field-of-view (FOV). Here, we demonstrate improved resolution across a large volume with Fourier DiffuserScope, which uses a diffuser in the pupil plane to encode 3D information, then computationally reconstructs the volume by solving a sparsity-constrained inverse problem. Our diffuser consists of randomly placed microlenses with varying focal lengths; the random positions provide a larger FOV compared to a conventional MLA, and the diverse focal lengths improve the axial depth range. To predict system performance based on diffuser parameters, we, for the first time, establish a theoretical framework and design guidelines, which are verified by numerical simulations, and then build an experimental system that achieves 3 volume. Our diffuser design outperforms the MLA used in LFM, providing more uniform resolution over a larger volume, both laterally and axially.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 15, 2020
- Source ID
- 10.1364/oe.400876
Entities
People
- Fanglin Linda Liu
- Grace Kuo
- Kyrollos Yanny
- Laura Waller
- Nick Antipa
Organizations
- David and Lucile Packard Foundation
- Gordon and Betty Moore Foundation
- Office of Naval Research