Scanning heterodyne confocal differential phase and intensity microscope.

Area of Science:

• Optical Microscopy
• Image Analysis
• Metrology

Background:

• Differential phase contrast microscopy and differential interference contrast microscopy are valuable imaging techniques.
• Simultaneous acquisition in both modes can enhance sample characterization but presents technical challenges.
• Existing methods may require separate setups or compromise performance for simultaneous imaging.

Purpose of the Study:

• To describe the construction of a novel scanning heterodyne differential microscope.
• To demonstrate simultaneous imaging in both differential phase and differential intensity modes.
• To present methods for electronically controlling imaging parameters for optimized sample analysis.

Main Methods:

• Utilized a scanning heterodyne interferometry setup.
• Employed indirect interference by combining two signal beams with a common reference beam.
• Implemented electronic control for adjusting imaging mode and optical transfer function.

Main Results:

• Achieved simultaneous optimal performance in both differential phase and differential intensity imaging.
• Demonstrated the capability to electronically alter imaging modes.
• Showcased the ability to electronically adjust the optical transfer function within each mode.

Conclusions:

• The developed scanning heterodyne differential microscope enables simultaneous dual-mode imaging.
• Electronic control over imaging parameters allows for system performance matching to specific sample requirements.
• This versatile microscopy approach enhances the adaptability and effectiveness of microscopic analysis.