Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
When we are in a library looking for a book at the very bottom layer of a
book shelf, we always have to bend over or squat to read book names.
This is extremely inconvenient. Therefore we use the principle of refraction,
deploying a spine reflector at the bottom layer of the book shelf, to enable
people to recognize book names there without any extra effort.