Ausgabe laser+photonics 2019
Editorial

A ground-breaking device

In October last year, the Nobel Prize in Physics 2018 was rewarded for ‘ground-breaking inventions in the field of laser physics’. One half of the prize went to Arthur Ashkin for the invention of optical tweezers and their application to biological systems. The other half was given jointly to Gérard Mourou and Donna Strickland for their mehr...

Articles

Image processingUltra-compact multispectral camera based on micro-optics

Whether from a satellite or a drone, multispectral imaging becomes increasingly important. There, every gram counts. Thanks to a specific microoptical concept, a new multispectral camera system weighs just 200 g and can be produced cost-efficiently. mehr...

Image processingSimplified camera development for industrial imaging

A new sensor family is available for the application-specific und fast development of new cameras by only requiring two board layouts in total. Camera manufacturer can reduce costs and accelerate time-to-market for new camera designs. mehr...

MetrologyPerovskite quantum dots: a full photophysical characterisation

Quantum dots made of perovskite semiconductors may become an alternative for chalcogenide based particles. A full photophysical characterisation with a compact spectrofluorometer allows the emission properties to be determined, loss processes identified and for the quality of the quantum dots to be further improved. mehr...

ManufacturingMulti-spot modules for laser joining

Multi-spot modules allow for a process-specific adjustment of the spot geometry and laser power, as they optimise critical brazing and welding processes. Originally developed for brazing of hot-galvanised sheets, meanwhile the technology is also available for keyhole welding applications. mehr...

ManufacturingAutomated process chain for laser metal deposition

Small and medium enterprises have so far failed to implement laser metal deposition due to the time-consuming nature of the overall process chain, which makes the process uneconomical. But now a consortium has developed an automated process chain suitable for complex tasks. mehr...

ComponentsPrecision asphere design for improved manufacturability

When designing precision optical components it is important to consider the manufacturing process and this is particularly true with complex parts such as aspheres. Small design changes at an earlier stage can make a huge difference in terms of feasibility, cost and delivery time. mehr...

ComponentsOptimised UV light curing through end-fused optical fibre bundles

Area-oriented UV light curing traditionally uses liquid light conductors or glued bundles of optical fibres. Both of these component solutions permit only limited radiation intensity. End-fused fibre bundles, however, allow to use the full potential of UV light sources for the first time. mehr...

ComponentsAspherization of Fizeau interferometry

The integration of aspherical optics into a Fizeau lens enables a much lighter and more compact design and also allows the measurement of larger specimens with the same input beam diameter of the objective. mehr...

MetrologyUltrafast acquisition of spectroscopic data

The defined delay between two laser pulses required for spectroscopic measurements is often obtained mechanically. Asynchronous optical sampling can also be used for this purpose. Among its major advantages is a significant reduction in data acquisition times. mehr...

ManufacturingBiofunctionalisation by interference-based microstructures

New developments increasingly focus on the generation of tailored micro- and nanostructures with biofunctional effects. Direct laser interference structuring provides versatile surface structures and increasingly benefits from advances made in laser technology. mehr...

Image processingImaging with hyperspectral sensors: optimum design for your application

The colour reproduction technique is an approximation and it is often insufficient to reliably solve a given machine vision problem. Hyperspectral imaging overcomes this limitation by providing a greater number of spectral bands. The required narrow-band spectral filters can now be implemented at the sensor level. mehr...

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