I saw a blind person using some sort of laser pointer instead of one of those sight sticks. How does that work?
It’s a laser ranging system(like a radar but using lasers). They detect obstacles, stairs, curbs, etc… and relay information to the user with audible tones or tactile information.
A laser ranging system works by sending out a pulse of beams and timing how long it takes the pulses to reflect back.
Tags: Pointer
It’s a laser ranging system(like a radar but using lasers). They detect obstacles, stairs, curbs, etc… and relay information to the user with audible tones or tactile information.
A laser ranging system works by sending out a pulse of beams and timing how long it takes the pulses to reflect back.
References :
http://www.optoiq.com/index/photonics-technologies-applications/lfw-display/lfw-article-display/221422/articles/laser-focus-world/volume-41/issue-2/world-news/hand-held-laser-tool-assists-the-blind.html
http://en.wikipedia.org/wiki/Ladar