Michelson-interferometric-configuration-based incoherent digital holography with a geometric phase shifter

Area of Science:

• Optics and Photonics
• Digital Holography
• Interferometry

Background:

• Phase-shifting methods are crucial for extracting complex information from holograms.
• Traditional methods can be complex and introduce noise.
• Digital holographic systems require efficient and accurate phase retrieval.

Purpose of the Study:

• To develop a simplified geometric phase-shifting method for incoherent digital holography.
• To enable multi-color hologram recording with reduced exposure times.
• To validate the proposed method through multi-color hologram recording and reconstruction.

Main Methods:

• Utilized a geometric phase-shifting technique within a Michelson-type interferometer.
• Employed a horizontal polarizer and two achromatic quarter-wave plates for phase shifting.
• Achieved simultaneous recording of phase-shifted interferograms across different color channels.

Main Results:

• Successfully demonstrated multi-color hologram recording with fewer exposures.
• The geometric phase-shifting method proved effective in reducing bias and twin-image noise.
• Theoretical phase-shifting amount is wavelength-independent, facilitating multi-color recording.

Conclusions:

• The proposed geometric phase-shifting method offers a simple and efficient approach for digital holography.
• This technique enables practical multi-color hologram recording.
• The method provides a robust alternative to conventional phase-shifting devices.