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Logo: HOT – Hanover Centre for Optical Technologies
Logo Leibniz Universität Hannover
Logo: HOT – Hanover Centre for Optical Technologies
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Tailored Light

The impressive advance in the development of semiconductor light sources actually effects a far-reaching change in lighting technology. LEDs as light sources significantly increase the energy efficiency of lighting systems. Furthermore semiconductor light sources allow the precise definition of the local, temporal and spectral characteristics of the emitted light. In combination with optical structures, elements as actors on the micro- and nanoscale the separation between geometrical optics and wave optics dissipates. Diffractive optical elements, micro arrays and light sources with structures on the nanoscale are building blocks for completely new solutions.

Learn more:

https://www.tailored-light.uni-hannover.de/

Related projects

Lighting Technologies

Imaging in scattering media

Bild zum Projekt Imaging in scattering media

Supervisor:

Dr.-Ing. Maik Rahlves, Prof. Dr. Bernhard Roth

Funded by:

Lower Saxony Ministry for Science and Culture (MWK)

Brief description:

Due to the effects of strong scattering, imaging in complex media such as biological tissue remains one of the great challenges of modern optics. Recent studies have shown that these effects may be compensated by spatially manipulating the light´s wavefront with active optical devices. This project aims to apply wavefront-shaping techniques to established imaging methods to enhance imaging performance and penetration depth in strongly scattering samples.

 

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Diffractive Optics in Coherent Automotive Lighting

Bild zum Projekt Diffractive Optics in Coherent Automotive Lighting

Supervisor:

Dr.-Ing. Maik Rahlves, Prof. Dr. Bernhard Roth

Researcher:

Muhammad Shaukat Khan

Funded by:

Lower Saxony Ministry for Science and Culture (MWK)

Brief description:

Recent developments in illumination technologies in automotive industry are heading towards use of coherent light sources, because incoherent light is poorly formable. Numerous amount of work has been done in order to incorporate laser based illumination sources for headlamps, but rear end illumination is still under investigation. With the use of laser as illumination source, utilization of diffractive optical elements (DOEs) to diffract the illuminating laser beam in a predefined intensity distribution can be possible.

 

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Non-contact dermatoscope for detection and examination of suspicious skin lesions

Bild zum Projekt Non-contact dermatoscope for detection and examination
of suspicious skin lesions

Supervisor:

Prof. Dr. Bernhard Roth, Dr. rer. nat. Merve Wollweber, Prof. Dr. Uwe Morgner

Researcher:

M.Sc. Dierk Fricke

Brief description:

The standard method for the examination of skin lesions is contact dermoscopy . With the contemporary contact-type dermoscopes, lesions have to be scanned manually by imaging each lesion in direct contact with the skin. Although established this procedure has several drawbacks as it is time consuming, has poor reproducibility, and may even be painful for the patient. A non-contact remote dermoscope can overcome these drawbacks and furthermore allow automatized screening protocols. Thus, this project revolves about the development of a non-contact dermoscope for detection and examination of suspicious skin lesions.

 

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Laser Diode Pumped Remote Phosphor Lighting Systems

Bild zum Projekt Laser Diode Pumped Remote Phosphor Lighting Systems

Supervisor:

Dr. Chandrajit Basu

Brief description:

For the next generation of automotive headlamps, a diode laser pumped remote phosphor based white light source is very promising.

 

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Hologram embossing

Bild zum Projekt Hologrammprägen

Supervisor:

Prof. Dr. Bernhard Roth, Dr.-Ing. Maik Rahlves

Researcher:

Dr.-Ing. Maik Rahlves

 

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