Tootfinder

🔊 New technique uses focused sound waves and holograms to control brain circuits
https://medicalxpress.com/news/2025-08-technique-focused-holograms-brain-circuits.html

New technique uses focused sound waves and holograms to control brain circuits
A new study provides the first visual evidence showing that brain circuits in living animals can be activated by ultrasound waves projected into specific patterns (holograms).

There's ice in the house and my computer is back--again. See what else is going on this week.
https://www.bobmuellerwriter.com/cooling-it-down/

Cooling It Down – Bob Mueller
A quiet night turns chaotic, a computer gets rebuilt, AI brings the dead back to life. From icemakers to holograms, it’s been a strange week.

Multi-Channel Amplitude-Phase Asymmetric-Encrypted Janus Acoustic Meta-Holograms
Haohan Zeng, Zhenyu He, Tianxiang Zhang, Xiao Guo, Xinghao Hu, Youyu Mo, Tingting Li, Feilong Mao, Haiyan Fan, Xudong Fan, Weiwei Kan, Yifan Zhu, Hui Zhang, Guodong Yin, Badreddine Assouar
https://arxiv.org/abs/2510.05789

Multi-Channel Amplitude-Phase Asymmetric-Encrypted Janus Acoustic Meta-Holograms
Encrypted optical and acoustic meta-holograms only focus on the encrypted hologram in a single channel, viz. modulating spatial amplitude to project a holographic image. In this research, the unique concept of multi-channel amplitude-phase asymmetric-encrypted Janus acoustic meta-holograms is proposed, demonstrating remarkable capabilities of generating, encrypting, and decrypting both amplitude and phase holographic images on both sides of a metascreen. The flexible and decoupled manipulation …

Cooling It Down
The house was completely silent—until it wasn’t. A sudden thud and rush of noise had me bracing for an expensive repair. From that small surprise to AI reviving legends, it’s been a week of odd resurrections.
https://www.bobmuellerwriter.com/cooling-it-down/

Cooling It Down – Bob Mueller
A quiet night turns chaotic, a computer gets rebuilt, AI brings the dead back to life. From icemakers to holograms, it’s been a strange week.

🪞 New technology turns paintings into holograms, bringing art to life
#display

New technology turns paintings into holograms, bringing art to life
Artists are always looking for new ways to create and express themselves. A growing trend is the use of multiple layers of see-through materials, such as Plexiglas, to create paintings that have real depth, transforming two-dimensional images into three-dimensional illusions that feel more realistic and lifelike. But can these layered works be made even more immersive?

Axial resolution post-processing engineering in Fresnel incoherent correlation holography
Shivasubramanian Gopinath, Joseph Rosen, Vijayakumar Anand
https://arxiv.org/abs/2509.26179

Axial resolution post-processing engineering in Fresnel incoherent correlation holography
Fresnel incoherent correlation holography (FINCH) is a self-interference-based incoherent digital holography method. In FINCH, light from an object point is split into two beams, modulated differently using two lenses with different focal distances, and creates a self-interference hologram. At least three phase-shifted holograms are recorded and synthesized into a complex hologram, which reconstructs the object image without twin image and bias noises. Compared with conventional imaging, FINCH …

Random-phase Gaussian Wave Splatting for Computer-generated Holography
Brian Chao, Jacqueline Yang, Suyeon Choi, Manu Gopakumar, Ryota Koiso, Gordon Wetzstein
https://arxiv.org/abs/2508.17480

Random-phase Gaussian Wave Splatting for Computer-generated Holography
Holographic near-eye displays offer ultra-compact form factors for virtual and augmented reality systems, but rely on advanced computer-generated holography (CGH) algorithms to convert 3D scenes into interference patterns that can be displayed on spatial light modulators (SLMs). Gaussian Wave Splatting (GWS) has recently emerged as a powerful CGH paradigm that allows for the conversion of Gaussians, a state-of-the-art neural 3D representation, into holograms. However, GWS assumes smooth-phase d…