Computer generated polarization holograms: phase recording by polarization effect in photodichroic materials

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Traditional holography often relies on detour phase or optical path difference for phase information.
• Photodichroic materials offer unique light interaction properties.

Purpose of the Study:

• To introduce a new computer holography algorithm.
• To enable phase information recording without conventional methods.

Main Methods:

• Utilizing anisotropic light interaction with photodichroic materials.
• Employing M centers in alkali halide crystals (e.g., sodium fluoride).
• Controlling polarization of the illuminating beam for wavefront recording.

Main Results:

• Demonstration of phase information recording without detour phase or optical path difference.
• Detailed description of information recording and reconstruction principles.
• Discussion of technical merits and challenges.

Conclusions:

• The proposed algorithm enables real-time holographic systems.
• Accurate recordability and high storage capacity are achievable.
• This method offers a new approach to wavefront recording through polarization control.