Contactless Braille sensing based on GaN optical devices integrated with epoxy lenses.

ABSTRACT: Braille serves as an efficient means for visually impaired individuals to access textual information and engage in communication. However, the process of reading Braille can often be cumbersome and time-intensive, particularly in bidirectional human-machine interaction. In this work, a compact optical device for contactless detection of Braille is fabricated and characterized. The GaN-on-sapphire chip, which employs monolithic integration, serves as the core for both light emission and photodetection, significantly reducing its overall footprint. The incorporation of the semi-ellipsoid epoxy lens with optimized dimensions ensures consistent and accurate detection. The sensing device demonstrates high stability and fast response through its line-scanning capabilities on Braille codes. The c

SUBMITTER: Cheng H 

PROVIDER: S-EPMC11978887 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature