Light pointers are required for point lighting or as a visual indication for systems in industry, in the equipment and design sector and in interior design. They create a sharply defined light spot on any object. due to the very narrow beam, light barrier applications can also be realized. Lasers often don’t come into question for reasons of eye safety but also long-term durability. The solution is an LED light source, whose beams are formed into a light beam with the narrowest possible beam angle.
Beam forming by lens
The basic principle of the construction is the homogenization of the LED light via ashort piece of poymer fiber, the polished end surface of which is projected onto the surface to be illumated by a lens. The LED pointer constructed in this way consists of a 1 W LED or PowerLED, whose heat loss is dissipated via a cylindrical aluminum housing. At the same time, the aluminum housing also serves as aholder for the imaging lens.
If a small slide with e.g. a pointer image is glued onto the end surface of the polymer fiber, this image is projected enlarged.
Beam forming by parabolic reflector
Alternatively, a narrow light cone can be generated by a parabolic reflector with the LED chip at its focal point. DieMount produces its submount reflectors using the metal forming process. In order to have not too long components, a plastic reflector is inserted into the parabolic submount reflector made of metal, which geometrically extends this paraboloid of the submount.
The inner wall of the plastic reflector reflects the light rays by total reflection into a narrow bundle. This construction is called Spotlight LED. It is available for small (12mil) and large (40mil) LED chips.