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Deterministic Diffusers
Deterministic diffusers scatter efficiently the light in a well-designed angular distribution and allow the homogenization of light sources. As deep structures they act achromatic and can be used for white light sources. They are realized with grayscale photolithography.
deterministic diffuser forms a star-shaped far-field pattern
deterministic diffuser forms a star-shaped far-field pattern
TECHNICAL SERVICE
Fraunhofer-Institute for Applied Optics and Precision Engineering IOF
Wafer-scale
[SOFTWARE SOLUTIONS] optical design and simulations (commercial and custom solution) [OPTICAL ELEMENTS] grayscale photolithography - maskless [OPTICAL ELEMENTS] dry etching [REPLICATION] UV-NIL replication
AR/VR Automotive Consumer electronics Healthcare & Life sciences Imagers & Displays Lighting Optical instrumentation Transportation

Tailored-light diffusers are designed according your specifications considering fabrication processes. The surface structures are realized by direct-writing grayscale photolithography into resist and by subsequent replication into UV-curable polymers. Transmissive and reflective designs are possible.

The design using an iterative Fourier-transform algorithm may consider a simulaneous (global) chief-ray angle deflection or local deflection leading to a lens function envelope. The approach allows a local scattering alteration as well.

- Mastering and replication for prototyping, piloting, and small series
- Transfer of master for your replication technology

- Wavelength and light-source characteristics
- Angluar light distribution
- number and size of elements
- material (criteria, i.e. environmental stability, wavelength, laser power)
- AR coating or reflective coating, if needed

tailored-light diffuser as fluorescent tube-replacement
tailored-light diffuser as fluorescent tube-replacement