May 21, 2025 by Kobe University edited by Sadie Harley , reviewed by Robert Egan scientific editor associate editor This article has been reviewed according to Science X's editorial process and policies . Editors have highlightedthe following attributes while ensuring the content's credibility: fact-checked peer-reviewed publication trusted source proofread
A groundbreaking development from Kobe University is poised to revolutionize holographic imaging. Scientists have successfully created a camera capable of recording three-dimensional movies using a single pixel, opening doors to unprecedented possibilities in holographic video microscopy and beyond. This innovative technique allows for the capture of images not only within the visible light spectrum but also through scattering media, such as tissues and biological samples. The research represents a significant leap forward, moving beyond the traditional reliance on lasers and complex holographic recording systems.
Traditionally, holography has been intrinsically linked to laser technology, demanding specialized equipment and processes. However, recent advancements have explored alternative methods for recording holograms using ambient light or light emitted from the object itself. Two primary approaches have emerged: FINCH, utilizing a 2D image sensor for visible light applications with unobstructed views, and OSH, employing a single-pixel sensor capable of penetrating scattering media and capturing light outside the visible spectrum – albeit limited to motionless objects. The Kobe University team, led by researcher Yoneda Naru, sought to combine the strengths of both approaches, addressing the speed limitations of the OSH system.
Narু and his team devised a novel setup incorporating a high-speed digital micromirror device. This device operates at an impressive 22 kHz, a refresh rate dramatically higher than previous devices which typically operate at just 60 Hz. This difference is likened to the contrast between a leisurely stroll and the speed of a Japanese bullet train, highlighting the transformative potential of this technology. The digital micromirror device projects the necessary patterns onto the object, enabling the recording of a holographic image. This advancement allows for the capture of dynamic scenes, overcoming the limitations of previously static holographic recordings.
Published in the journal Optics Express, the team’s proof-of-concept experiments demonstrated the camera’s ability to record 3D images of moving objects, with a particularly compelling demonstration using a mouse skull as a test subject. Despite a current frame rate of just over one frame per second, the researchers have calculated a theoretical maximum of 30 Hz, a standard frame rate for typical displays. This would be achieved through a sophisticated compression technique called ‘sparse sampling,’ which intelligently avoids recording every detail simultaneously, optimizing data usage. This represents a critical step towards real-time holographic video recording.
Looking ahead, the potential applications are vast. Yoneda Naru envisions this technology’s use in minimally invasive, three-dimensional biological observation, allowing scientists to visualize moving objects hidden behind scattering tissues. However, challenges remain. The team is focused on increasing the number of sampling points to enhance image quality and exploring the use of deep-learning algorithms to transform raw data into recognizable images. These efforts aim to refine the system and unlock its full potential. Further research will concentrate on optimizing the projection patterns and developing advanced image reconstruction methods. The ultimate goal is to create a robust and versatile holographic video camera with the capacity to capture dynamic scenes in complex environments. The research team’s findings represent a pivotal moment in the evolution of holographic imaging, promising a future where detailed, three-dimensional visualizations are accessible through remarkably compact and innovative devices. The implications extend beyond scientific research, potentially impacting fields like medical imaging, industrial inspection, and even entertainment. Continued development and refinement will undoubtedly lead to even more groundbreaking applications in the years to come. The team’s innovative approach, combining speed and penetration capabilities, sets a new standard for holographic video recording, paving the way for a new era of visual exploration.
