Content of research

In holographic diversity interferometry, multiple image sensors are arranged in combination with a polarizing optical element to enable precise detection of optical phase distribution in a single measurement without spatial completion error. We have developed an interferometric optical system using two image sensors and have greatly improved the measurement algorithm to achieve highly accurate phase measurement and enable 3D information processing using the measured phase distribution data. This technology can be applied directly to the acquisition of 3D optical information, optical tomography by digital phase conjugation, and 3D optical memory. In this research, we have also succeeded in developing a reference light-free phase detection system that filters the signal light spatially filtered and re-interacts with the signal light. This is expected to find applications in next-generation ultrahigh-speed optical communication systems using spatial modes and in the field of remote sensing.

Potential for social implementation

• ・3D Image Measurement
• ・3D tomography
• ・Digital phase conjugation
• ・3D optical memory/hologram
• ・Spatial mode optical communication

Appealing points to industry and local governments

The measurement and control of optical complex amplitudes will accelerate the integration of optical information processing and digital signal processing, contributing not only to speeding-up and lower power consumption of IT systems, but also to the creation of new technologies in a wide range of fields such as medical measurements and product design.