A retro-reflective communication system uses self-aiming color-changing elements to modulate incoming light for directional data transmission.
Quasi-periodic sub-wavelength arrays replace bulky corner cubes, reducing weight while maintaining reliable retroreflection for optical modulators.
Multiple concentric optical interference layers deposited on a solid spherical core enhance retroreflective brightness through constructive interference.
An adhesive layer containing whiteness enhancing and infrared blocking materials reduces halation while maintaining plate visibility.