Freeform Lens Overview
The freeform lens allows you to create a collimating lens, a user irradiance target-based lens or a user intensity target-based lens with a complex shape.
In the automotive industry, headlamps play a key role in the vehicle's signature. Therefore, designers put more and more efforts in styling the visible parts of the lens system (the front or outer face of the lenses) contained in the headlights.
Complex or freeform shapes are used to model the front faces of projection lenses. As a result, the back face of the lens has to be adjusted by optical designers in order to compensate such complex shapes.
Freeform lenses are often made out of plastic as it is easier to shape and compatible with LED projector modules.
In Speos, the definition of the freeform lens is mainly automatic. The algorithm calculates and designs the back face of the lens based on the shape of the front face to build a lens with the expected optical behavior.
- For a collimating lens, it only requires the front face of your lens. Once selected, the lens is automatically built to meet your freeform surface profile
- For a user target-based lens, you design your own target and control the light distribution on the target.
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| Freeform Surface | Result after construction | image-based result |