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Free form optics

Compact and powerful optics for innovative products

Free form optics are bespoke precision optics which combine several optical functions in a single component. They are small, lightweight and they deliver additional functionalities.

As a rule, optical assemblies or beam delivery systems are based on a sophisticated system of precisely coordinated mirrors, lenses, and prisms. In the case of free form optics, however, a single component ideally suffices to implement the same range of functions. They enjoy a special status in optical applications and they are primarily used where several optical-functional components or surfaces must be combined due to limited space. Thanks to their low weight and compact design, free form optics can be installed where very little space is available.

 

Based on its many years of experience, WILD puts a great emphasis on the manufacturability of the final product already during the development phase of free form optics. Designers will consider the use of free-form optics especially when the product needs to be very lightweight and compact, e.g. for handheld devices. Moreover, by reducing the number of necessary optical components to a minimum, it is also possible to achieve lower manufacturing costs. Another argument in favour of free form optics is their simpler assembly, since they can potentially render the adjustment on the assembly obsolete. In addition, their surfaces can be designed in any desired shape. All in all, this allows for greater flexibility in the optical design while increasing the performance of the overall product.

 

High-power ring light

WILD has aptly demonstrated these advantages in a high power ring light (HPRL). The use of free form optics in this system made a compact design possible in the first place. The respective free form lens in front of each LED – always only one for each LED – allows for a special beam shaping and delivery for a homogeneous illumination of objects. If standard optics had been used, several lenses positioned in a row would have been necessary to achieve the same result. In addition to being continuously dimmable, this system also achieves top brightness while maintaining a stable, homogeneous illumination.

 

Another advantage is the adjustable position of the lens, which allows the user to ideally adjust brightness both at small and large working distances. These are all features of a modern lighting unit that can only be implemented using free form optics.

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