Double-field-of-view, quasi-common-path interferometer using Fourier domain multiplexing

Area of Science:

• Optical Engineering
• Interferometry
• Imaging Science

Background:

• Traditional interferometers often face limitations in field of view (FOV) and complexity.
• Simultaneous imaging of multiple sample regions can enhance efficiency in various scientific applications.

Purpose of the Study:

• To develop and demonstrate a quasi-common-path interferometer capable of achieving a double field of view (FOV).
• To enable the imaging of two distinct sample areas concurrently using a single image sensor.

Main Methods:

• A novel quasi-common-path interferometer design utilizing three mirrors to split a laser beam.
• Utilizing Fourier domain multiplexing by modulating two sample images with different spatial carrier frequencies.
• Employing a reference beam derived from a clear area within the sample.

Main Results:

• Successful experimental demonstration of the double FOV interferometer.
• Acquisition of interferometric images from two different areas of a test target using a single image sensor.
• Validation of the Fourier domain multiplexing technique for spatial carrier frequency modulation.

Conclusions:

• The proposed quasi-common-path interferometer effectively achieves a double FOV.
• This technique offers a viable method for simultaneous multi-area imaging with enhanced efficiency.
• The experimental results confirm the feasibility and potential of this innovative interferometric approach.