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Chiral photonic metamaterials – polarization control by nanostructuring

13.11.2012 - Photonik international /2012

Artificial photonic metamaterials consist mainly of exotically shaped metallic nanostructures. By tailored design of their geometrical parameters, they can enhance optica...
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This technical articel is also under the category: Manufacturing of Optics

Prototyping illumination systems with stock optical components

13.11.2012 - Photonik international /2012

In most imaging system designs, development efforts focus on the imaging optics. But illumination can be an equally important factor in the success of such systems. The p...
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This technical articel is also under the category: Incoherent Light Sources

Femtosecond laser micromachining for plastic lab-on-a-chip

13.11.2012 - Photonik international /2012

Rapid prototyping of lab-on-chip devices is accomplished using femtosecond laser micromachining techniques. Direct laser ablation allows fabrication of microfluidic chann...
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This technical articel is also under the category: Manufacturing of Optics

Optical freeform surfaces: an overview

13.11.2012 - Photonik international /2012

Optical freeform surfaces have great potential for optical systems, particularly in the area of miniaturizing sub-assemblies. Unlike aspherical lens elements, however, op...
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This technical articel is also under the category: Manufacturing of Optics

Replicating diffractive optical elements in synthetic quartz glass using the sol-gel-process

13.11.2012 - Photonik international /2012

When manufacturing macroscopic monolithic quartz glass products using an established sol-gel-process, the question arises about the minimum size surface structures that c...
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This technical articel is also under the category: Manufacturing of Optics

Spherical aberration compensation plates

17.11.2011 - Photonik international /2011

Imaging optics strive to obtain perfect or near diffraction limited performance. The main detriment to imaging systems is spherical aberration, and it costs money and eff...
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This technical articel is also under the category: Manufacturing of Optics

Highly stable mixed coating layers for optical applications

23.11.2010 - Photonik international /2010

With improved variants of ion beam sputtering and spectral broadband monitoring, particularly stable optical layer systems for high-performance and short-pulse lasers can...
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This technical articel is also under the category: Coatings

Are miniaturised high-precision optics reaching the limits of classical machining?

23.11.2010 - Photonik international /2010

Today’s optical lenses are produced either through conventional surface machining, or through various replication procedures. Below we compare these manufacturing methods...
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This technical articel is also under the category: Manufacturing of Optics

LED heat management

23.11.2010 - Photonik international /2010

LEDs are more efficient than light bulbs, transforming roughly 30% of supplied electric power into light, yet 70% of this energy is cast off as heat. This lost heat needs...
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This technical articel is also under the category: Incoherent Light Sources

Beam manipulation: prisms vs. mirrors

12.11.2009 - Photonik international 2/2009

Designers of beam manipulation and imaging systems often encounter the need to fold their optical layout into a more compact form, or to redirect light to the next compon...
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Large-area applications of optical MEMS: micromirror arrays guide daylight, optimize indoor illumination

12.11.2009 - Photonik international 2/2009

Future indoor light distribution of living and office spaces will improve significantly when large-area micromirror arrays are used in conventional double-glazed windows....
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Telecentric lenses for cameras with image sensor size larger than 1 inch

12.03.2009 - Photonik international 1/2009

The perspective-free imaging of telecentric lenses makes them suitable for measurement tasks and for inspection of three-dimensional objects, as the image scale remains c...
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This technical articel is also under the category: Image Capturing and Processing

Fabrication of ultra thin liquid crystal cells for fast phase modulation in a volume holographic data storage system

12.03.2009 - Photonik international 1/2009

One approach in the development of new optical storage systems is volume holography. Here, the phase code multiplexing technique realised with liquid crystal cells can re...
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This technical articel is also under the category: Manufacturing of Optics

Tunable Fabry-Perot-filters based on InP/air-gap mirrors

12.03.2009 - Photonik international 1/2009

Tunable optical filters can cover spectral broad ranges in sensor technology and data communications either as a single element or as a group of elements arranged in an a...
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Glass ceramic – foundation for highest precision

12.03.2009 - Photonik international 1/2009

Glass ceramics with zero thermal expansion have firmly established themselves as the material of choice for mirror substrates in large telescopes. At the same time, they ...
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This technical articel is also under the category: Optical Metrology

Custom-designed lenses: how to reduce risk and improve results

12.03.2009 - Photonik international 1/2009

It is crucial that all sides in a joint development and procurement program understand and document the scope of work, expectations and responsibilities of all parties. W...
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This technical articel is also under the category: Manufacturing of Optics

Holographic polymer data storage medium as a security label

12.03.2009 - Photonik international 1/2009

Is it really genuine? Nowadays, security holograms are old hat even to counterfeiters. The next step in the fight against product pirates is multi-level security systems ...
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This technical articel is also under the category: Laser Technology

Bringing order into light with structured polarisers

14.11.2008 - Photonik international 2/2008

Optical technologies are making increased use of the polarisation of light as an additional source of information. Not only does this result in more stringent optical par...
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Chirped refractive microlens arrays

14.11.2008 - Photonik international 2/2008

Conventional microlens arrays consist of identical lenses arranged on an equidistant grid. By contrast, chirped arrays are composed of similar but non-identical lenses. I...
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This technical articel is also under the category: Image Capturing and Processing

Scanning lenses and systems

14.11.2008 - Photonik international 2/2008

Laser scanning systems using galvanometer mirrors or rotating polygons require f-theta scanning lenses. They can correct the nonlinearity between the distance traveled by...
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This technical articel is also under the category: Laser Technology

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