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,partic...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 semiellipsoid 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 captured signals are analyzed using a microcontroller,and the Braille recognition results are wirelessly transmitted to a portable mobile device,enabling the conversion into audio and visual formats.This innovative design not only facilitates Braille reading but also holds the potential to advance human-machine interaction.展开更多
基金financial support from the National Natural Science Foundation of China under Grant 12074170in part by the Shenzhen Fundamental Research Program under Grant JCYJ20220530113201003.
文摘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 semiellipsoid 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 captured signals are analyzed using a microcontroller,and the Braille recognition results are wirelessly transmitted to a portable mobile device,enabling the conversion into audio and visual formats.This innovative design not only facilitates Braille reading but also holds the potential to advance human-machine interaction.
