Traditional Fresnel optic technology
Fresnel optic technology was firstly used on lighthouses in Atlantic seaports, as it has been used widely until now on lighthouses, detectors etc. for its high efficiency, small size, and good focusing performance.
Improved Fresnel technology of SELF company
Fresnel optic technology cannot be directly applied in ceiling lighting, SELF is the first company in the lighting industry to improve Fresnel optic technology, through our tough secondary innovation, finally we designed out new improved Fresnel optic technology which can be used in ceiling lighting.
Complex design and highly precise equipment for production.
To ensure the quality of optical lenses, a large amount of mathematical multiple differential calculations are required during the design of new optic, a mathematical model for each point is set up, then to the whole lens. The nanoscale equipment also necessary, is developed by SELF company which can not be purchased from the market.
Fresnel Lens/Differential Ripple Lens
Due to the large amount of multiple differential calculations carried out during the optic design process and the final shape of the lens like a droplet of water dropping into the water surface, we also call the Fresnel lens as the differential ripple lens.