Work

Phase-controlled, speckle-free holographic projection with applications in precision optogenetics

Year: 2018

Type: article

Abstract: Holographic speckle is a major impediment to computer-generated holographic (CGH) projections in applications ranging from display, optical tweezers, and machining to optogenetic neural control. We present an iterative phase retrieval algorithm that allows the projection of amplitude-controlled speckle-free one-dimensional patterns with a high degree of pattern uniformity. The algorithm, termed the weighted Gerchberg-Saxton with phase-control (GSW-PC), is shown to have the ability to simultaneously control both the phase and amplitude of projected patterns with high diffraction efficiencies. Furthermore, we show that the framework can address the challenge of projecting volumetric phase and amplitude-controlled patterns, by incorporating GSW-PC with the angular spectrum method. The algorithms' performance is numerically and experimentally tested, and further compared with conventional and modern CGH techniques.

Source: Neurophotonics

DOI: 10.1117/1.nph.5.2.025004

Authors: Tal Aharoni, Shy Shoham

Institutions: Technion – Israel Institute of Technology, NYU Langone Health, New York University

Language: English

Topic: Advanced Optical Imaging Technologies

Subfield: Media Technology

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: European Commission, National Institutes of Health, H2020 European Research Council

Awards: Advanced holographic optical neural stimulation for vision restoration and basic research, G434337789, Behavioral readout of spatiotemporal codes dissected by holographic optogenetics