Research
Research Projects

Overview of research projects at the HOT

Lighting Technologies

  • Non-contact dermatoscope for detection and examination of suspicious skin lesions
    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.
    Team: M.Sc. Dierk Fricke
    Year: 2017
  • Diffractive Optics in Coherent Automotive Lighting
    Recent developments in lighting technologies in the automotive industry is heading towards coherent light sources, as incoherent light is difficult to shape. A lot of work has been done to integrate laser-based light sources for headlamps, butlaser based backlighting is still under investigation. Using the laser as a light source and diffractive optical elements (DOEs), high-resolution and thin rear lights can be realized.
    Year: 2017
    Sponsors: Niedersächsisches Ministerium für Wissenschaft und Kultur (MWK)
  • Imaging in Scattering Media
    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.
    Year: 2017
    Sponsors: Lower Saxony Ministry for Science and Culture (MWK)
  • Laser Diode Pumped Remote Phosphor Lighting Systems
    For the next generation of automotive headlamps, a diode laser pumped remote phosphor based white light source is very promising.
    Year: 2013

Optical Information Technologies

Optical Sensors

Numerical Optics and Simulations

Biophotonics and Analytics

Human Skin

  • Non-contact dermatoscope for detection and examination of suspicious skin lesions
    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.
    Team: M.Sc. Dierk Fricke
    Year: 2017
  • Determination of melanoma thickness via optoacoustics and optical coherence tomography (OCT)
    Development of a method for the preoperative determination of the thickness of melanoma suspicious skin lesions.
    Year: 2013
    Sponsors: BMBF
  • Hautkrebsscreening (HKS)
    Entwicklung eines digitalen Dermatoskopiegerätes mit erweitertem Diagnoseumfang für das automatisierte Ganzkörper-Hautkrebs-Screening (Melanom-früherkennung)
    Year: 2012

Polymeroptics and Photonics

  • PlanOS-SFB Sub-Project C05
    Subproject C05 is investigating polymer-based sensors for life science. These sensors enable the optical and spectroscopic analytics in fluidic systems. The aim is to design a sensor, which is able to detect lowest analytic concentrations (final target single-molecule sensitivity). Operating principle of the sensor are Whispering gallery resonances in microspheres.
    Year: 2013
    Sponsors: DFG
  • PlanOS-SFB Teilprojekt C02
    The subproject C02 explores novel polymer-based sensor structures for optical strain-measurement, in terms of different sensor types as well as in terms of different manufacturing processes. In the long run, all approaches aim at a large-scale and a low-cost manufacturing process (e.g., roll-to-roll). The goal is the integration of sensor systems on polymer foils, which convert strain amplitude and direction into optical signals, enabling a wide range of applications. The main challenge lays in the implementation of strain sensors, which are based on intensity- and spectral-modulation, the study of parasitic effects and the development of calibration concepts as well as advancing lab-typical production processes to large-scale processes.
    Year: 2013
    Sponsors: DFG
  • PlanOS-SFB Sub-Project B04
    Aim of this project is the design and fabrication of micro-optical structures for guiding light inside thin polymer foils as well as coupling light into and out of the foil. To realize a large area sensor network within PlanOS, a perfect interaction between all optical devices such as light sources, sensors and detectors is of great importance. Therefore, micro-optical structures are necessary, which connect all components to the sensor foil. One of the key issues is to increase the coupling efficiency of these linking structures as much as possible to gain maximum performance of the sensor networks.
    Year: 2013
    Sponsors: DFG
    Lifespan: 4 Years
  • Polymer optics
    Year: 2011

DFG- and Industry projects

  • AMIRA - Analysis of microbial relations in vivo using Raman microscopy
    Projekt AMIRA is a cooperation between HOT and the department for Hydrobiology and Environmental Biotechnology at the Institute for Sanitary Engineering and Waste Management (ISAH) of the LUH and intends to establish cytochrome c-resonant Raman microscopy (CRRM) for the continuous analysis of bacterial relations in native, undisturbed biofilms in vivo and in situ with a resolution at cell level. This will allow for the time the direct observation of ongoing biofilm formation including phylogenetic information and phenotypic adaptation in complex biofilms in vivo.
    Year: 2018
    Sponsors: Deutsche Forschungsgemeinschaft (DFG) - 397827619
  • OPTIMUS -Raman spectroscopy of microplastics, microbes, and trace elements
    online detection of contaminated microplastics in streaming drinking water with Raman spectroscopy for the BMBF joint project OPTIMUS.
    Year: 2016
    Sponsors: Bundesministerium für Bildung und Forschung (BMBF)
  • RRS-OA
    Year: 2011
    Sponsors: DFG
  • gebo
    Year: 2011
  • Hautkrebsscreening (HKS)
    Entwicklung eines digitalen Dermatoskopiegerätes mit erweitertem Diagnoseumfang für das automatisierte Ganzkörper-Hautkrebs-Screening (Melanom-früherkennung)
    Year: 2012
  • InTex
    Year: 2011
  • OCT
    Year: 2011
  • ODONTO
    Year: 2011
  • Active Microoptics
    SPP 1337: Active Microoptics
    Year: 2011

Research consortium and Collaborative projects

  • Hybrid Numerical Optics
    A New Topical Focus at the Hannover Centre for Optical Technologies HOT
    Year: 2015
    Sponsors: Niedersächsisches Vorab
  • PlanOS-SFB Teilprojekt C02
    The subproject C02 explores novel polymer-based sensor structures for optical strain-measurement, in terms of different sensor types as well as in terms of different manufacturing processes. In the long run, all approaches aim at a large-scale and a low-cost manufacturing process (e.g., roll-to-roll). The goal is the integration of sensor systems on polymer foils, which convert strain amplitude and direction into optical signals, enabling a wide range of applications. The main challenge lays in the implementation of strain sensors, which are based on intensity- and spectral-modulation, the study of parasitic effects and the development of calibration concepts as well as advancing lab-typical production processes to large-scale processes.
    Year: 2013
    Sponsors: DFG
  • PlanOS-SFB Sub-Project B04
    Aim of this project is the design and fabrication of micro-optical structures for guiding light inside thin polymer foils as well as coupling light into and out of the foil. To realize a large area sensor network within PlanOS, a perfect interaction between all optical devices such as light sources, sensors and detectors is of great importance. Therefore, micro-optical structures are necessary, which connect all components to the sensor foil. One of the key issues is to increase the coupling efficiency of these linking structures as much as possible to gain maximum performance of the sensor networks.
    Year: 2013
    Sponsors: DFG
    Lifespan: 4 Years
  • Polymer optics
    Year: 2011