Optical system offering an efficient "Variable" beam angle solution

This technology exists for different type of lamps. The goal here is to deviate all or a portion of the rays by mechanically changing location and angle of some optical surfaces.

System efficiency usually remains high but design and assembly cost are higher due to more components and precise mechanical features in those systems to adjust properly the critical surfaces. The use of a liquid crystal technology is also available but cost is still expensive and is only an option for high end products.

Of course additional components increase lamp weight and its CO2 emission during manufacturing..

With this solution you have to use different type of diffuser placed at the light exit location of the optical system.

It can be a film or solid piece with a texture or microstructure on it and you need to store different type of diffuser depending of the beam angle you need.

So the cons are:

• the storage of the diffusers
• a manual replacement of them that can be an issue if  access to the lamp is difficult
• an extra layer to your optical system that generates extra losses
• a limitation of the beam angle option

One diffuser = One beam angle

• Source: 1 x High power LEDs
• Flux: 475 Lm
• One collimator with a unique cross shape design
• One rotating diffusive lens

• 100 microns scale range texture with a specular finish to minimize losses
• Variable texture with a smooth gradient transition
• Moldable texture with standard thermoplastic (PMMA, PC)