Digital micromirror device as a spatial illuminator for fluorescence lifetime and hyperspectral imaging

Area of Science:

• Microscopy and Imaging Technologies
• Biophotonics
• Spectroscopy

Background:

• Time-domain fluorescence lifetime imaging (FLIM) and hyper-spectral imaging (HSI) are crucial for biological research.
• Traditional FLIM and HSI methods often involve complex, costly setups with trade-offs in precision, speed, and resolution.

Purpose of the Study:

• To propose and evaluate a novel digital micromirror device (DMD) based system for time-domain FLIM and HSI.
• To leverage DMD's unique capabilities for enhanced spatial control and efficiency in imaging.

Main Methods:

• Utilized a digital micromirror device (DMD) as a spatial illuminator with a laser diode excitation source.
• Implemented random and parallel access to regions of interest (ROIs) for rapid data acquisition.
• Developed a DMD system for efficient global analysis in FLIM.

Main Results:

• Acquired spectral and lifetime images with precision comparable to single-point systems but with greater spatial flexibility.
• Demonstrated effective spectral and temporal separation for target identification using phantoms with fluorescent dyes.
• Showcased the DMD system's capability for efficient global analysis in FLIM.

Conclusions:

• The proposed DMD-based system offers a flexible, precise, and efficient approach for advanced FLIM and HSI.
• This method overcomes limitations of traditional scanning techniques, improving data acquisition and analysis.
• DMD-enhanced FLIM and HSI are valuable for target identification and detailed analysis in biological samples.