Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Coating free-form surfaces on large optical components

05.06.2018

The business unit Precision Coatings at Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has special expertise in developing deposition processes for high-precision coating systems on optical components. Now, a coating technology for Deposition of laterally graded optical layers on 2D and in the future also on 3D substrates has been developed. The results will be presented at the 2nd OptecNet Annual Conference in Berlin, June 20-21, 2018.

Light plays an important role in more and more economic sectors and markets – including in data transmission, communication, energy generation, laser processing, and classical optics. Accordingly, the demands placed on high-performance optical products and systems are increasing rapidly. Components and integrated optical systems are becoming increasingly complex.


1-dimensional graded, nearly sinusoidal layer thickness curve on glass substrate (450x450 mm)

© Fraunfofer FEP | Picture in printable resolution: www.fep.fraunhofer.de/press


Saddle-shaped layer with specified profile on glass substrate (450x450 mm)

© Fraunfofer FEP | Picture in printable resolution: www.fep.fraunhofer.de/press

Only recently, a team of researchers from science and industry was awarded the "Forschung im Verbund" joint industry and science prize for the latest developments in free-form optical systems. Employment of increasingly complex surfaces in optics means the complexity of the coatings also increases.

Applications using complexly shaped surfaces that enable the viewer to see content or objects from different perspectives, or to achieve a desired optical effect with varying incident angles of light, require highly complex optical layer systems.

The scientists at Fraunhofer FEP have now succeeded in developing new processes and coating technologies that can be used for complex surfaces of large optical components. Specifically, this involves fabrication of lateral gradient layer systems.

The objective of this research is to manufacture optical layer systems adapted to applications characterised by variable angles of incidence, such as waveguides in holography, head-up displays, laser illumination, and laser processing systems. One focus has also been adapting the coating technology to larger surfaces, as a trend towards larger substrates with curved surfaces has become apparent.

The results make it feasible to better adapt to specific customer requirements by locally adjusting the optical function of optical multilayer systems. This applies in particular to coatings on large substrates or 3D substrates, where the incident angle of the light locally varies in the application. The optical function now can be adapted to the given incident angle of light.

Dr. Daniel Glöß, head of department Dynamic Coating explains: “The requirements for process control are very high. We basically have to adjust the coating thickness locally, which can be done either by accelerating the substrate movement during deposition or by varying the coating rate as a function of the substrate location. In both cases, we need very precise substrate movement.

With the PreSensLine, we have a coating system with the means for precision movement. The system control has now been adapted so that we can manufacture such coatings and offer them on a customer-specific basis.”

The complex requirements on the coating system were particularly challenging. As a result, through the joint research project “TopBePro” together with with AIS Automation Dresden GmbH, LSA GmbH and dresden elektronik ingenieurtechnik GmbH, Fraunhofer FEP scientists are now able to exert very precise temporal control over the different components (precision drive, coating sources, and power supply). Additional interfaces were implemented in EtherCAT and have achieved time resolution of the communication between components of <1ms.

Further development work is planned on the simulation in order to achieve the appropriate coating processes for the corresponding coating thickness profiles. In addition, the scientists are also looking to the future and intend to coat 3D substrates, such as larger mirrors and lenses, in addition to the existing planar coatings. The hardware requirements for this are met by the PreSensLine system at the Institute.

The scientists are open to discussing new specifications from interested partners for joint development of new applications. For detailed and personal discussions, colleagues from Fraunhofer FEP will be available during the 2nd OptecNet Annual Conference 2018 in Berlin, June 20-21, 2018.

2nd OptecNet Annual Conference
20–21 June 2018
Harnack Haus
Ihnestraße 16 – 20
14195 Berlin, Germany
http://optecnet.de/jahrestagung/jahrestagung-2018/

Staff from Fraunhofer FEP will be present at the exhibition booth.

Press contact:
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP
Winterbergstraße 28 | 01277 Dresden, Germany | www.fep.fraunhofer.de
Head of Marketing: Ines Schedwill | Phone +49 351 8823-238 | ines.schedwill@fep.fraunhofer.de
Head of Corporate Communications: Annett Arnold, M.Sc. | Phone +49 351 2586-333 | annett.arnold@fep.fraunhofer.de

Weitere Informationen:

http://optecnet.de/jahrestagung/jahrestagung-2018/
http://s.fhg.de/6Ut

Franziska Lehmann | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Further information:
http://www.fep.fraunhofer.de/

More articles from Process Engineering:

nachricht Quick and safe laser joining of steel-aluminum mixed connections
05.06.2018 | Laser Zentrum Hannover e.V.

nachricht A new method measures the immune cell response within minutes
30.05.2018 | Eberhard Karls Universität Tübingen

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Photoexcited graphene puzzle solved

A boost for graphene-based light detectors

Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...

Im Focus: Water is not the same as water

Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.

From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

12th COMPAMED Spring Convention: Innovative manufacturing processes of modern implants

28.05.2018 | Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

 
Latest News

Modular virus-like particles as vaccine platform?

05.06.2018 | Life Sciences

Speech comprehension with a cochlear implant

04.06.2018 | Medical Engineering

Hybrid overhead lines: More power, not more power lines

04.06.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>