5mm LED fibre optic coupler

thingiverse

12 times five-millimeter LED coupler securely connects high-powered light-emitting diodes to fiber-optic cables with remarkable reliability. When unencumbered, LEDs cast an image onto a printed circuit board or other transparent surface with ease, without compromising its structure in any way. This updated model prints LED holders independently, providing screw mounting options for a secure fastening to the main base plate using stainless steel or nylon zipties.