Related Experiment Video
Updated: Mar 31, 2026
09:30
Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points
Published on: March 2, 2011
16.3K
Digital micromirror device-based laser-illumination Fourier ptychographic microscopy
Optics Express
|October 20, 2015
Summary
This study introduces a new Fourier ptychographic microscopy (FPM) method using a digital micromirror device (DMD) and a coherent laser for faster, high-resolution imaging. The novel approach enables shot-noise limited imaging, overcoming limitations of previous systems.
Area of Science:
- Optics and Photonics
- Microscopy Techniques
- Digital Imaging
Background:
- Traditional Fourier ptychographic microscopy (FPM) relies on partially coherent illumination, limiting imaging speed and brightness.
- Existing FPM systems face throughput limitations due to insufficient illumination brightness.
- High-speed imaging in FPM is crucial for dynamic sample analysis.
Purpose of the Study:
- To develop a novel Fourier ptychographic microscopy (FPM) approach for enhanced imaging speed and resolution.
- To utilize a digital micromirror device (DMD) for generating spatially modulated illumination in FPM.
- To enable shot-noise limited high-speed imaging using a coherent laser source.
Main Methods:
- Employed a digital micromirror device (DMD) for generating spatially modulated sample illumination with a 532 nm coherent laser source.
- Imaged the DMD onto the back focal plane of the illumination objective to control illumination angles.
- Varied illumination plane wave angles at speeds exceeding 4 kHz by coding DMD states.
- Reconstructed high-resolution images from intensity images acquired with different oblique illuminations.
Main Results:
- Demonstrated a novel FPM system utilizing a DMD and coherent laser for high-speed, high-resolution imaging.
- Achieved illumination angle modulation at speeds over 4 kHz, significantly increasing imaging throughput.
- Successfully reconstructed high-resolution images from a USAF resolution target and a fiber sample without significant laser speckle.
- Showcased the potential for shot-noise limited imaging, improving image quality.
Conclusions:
- The developed DMD-based FPM approach offers a significant advancement in imaging speed and resolution.
- This method overcomes the brightness and speed limitations of partially coherent illumination in conventional FPM.
- Future integration with coded-aperture compressive-sensing algorithms promises further improvements in DMD-based FPM imaging speed.
