Technology Offers Optics / Laser

Ultrafast separating and positioning of pulsed laser beams by means of an optical circulating device

In addition to developing high-power and high repetition rate laser sources it is essential to implement versatile and precise positioning of the individual pulses on the workpiece in order to increase the productivity and quality in laser material processing.
An approach developed at the University of Stuttgart does not require any moving components for beam positioning. The module for beam separation can easily be added to existing systems. The type of beam positioning is micron-accurate and ultrafast. Through precise synchronization of the outcoupling mechanism with the laser pulse circulation, each individual pulse can be recalled in the desired position, which enormously increases the flexibility of a machining process.



Time intervals of laser pulses adjustable for each single pulse - USP lasers included / “pulse on demand”

With the new method, developed at University of Stuttgart, the temporal sequence of the laser pulses can be exactly adapted to the relative speed of the machining station. Conversely, the machining pattern can also be varied in a targeted manner while maintaining the same relative speed.
The system thus opens up a wide range of new design options when using USP lasers in material processing, while maintaining consistent processing quality.



High-speed 3D-surface scanning by Area Confocal Scanning Microscopy (ACSM)

The new area confocal scanning microscopy (ACMS) is uniquely suited to optical non-contact measurements such as surface inspection and 3D measurement technology. Compared to customary measuring systems the scanning speed is increased by a factor of several hundred with only a slight reduction in resolution.



Growing delicate 2D and 3D semiconductor structures by locally heating a precursor film

The new direct patterning procedure for semiconductors provides the possibility to create new, delicate layouts and designs for micro- and nanoelectronics.
The invention is based on a simple lithography process that can be used to create 2D and 3D semiconductor structures as small as 20nm without masks or etching side effects.



Easy integration of functional regions into optical components generated by 3D printing

With this process, 3D printed optical elements can be optimized. Functional properties such as diaphragms, color filters or achromats can be integrated into the design of optical components using microcavities equipped with functional substances. The process can be implemented cost-effectively and enables the simple and efficient integration of new materials.



Individual Workload and Strategy Assessment – IWSA: Ocular based state-detection for HMI interfaces

This evaluation system for human-machine interactions based on gaze-based parameters for the first time does justice to the inter- and intraindividual characteristics of the user. Especially in the area of demanding or highly qualified tasks, this system can be used to set up and continuously improve a workplace individually and efficiently.



COMPASS – Compact Multi-Pass Amplifier System: Leistungsstarker UKP-Laser-Verstärker (kW-Bereich)

This multi-pass amplifier concept offers a previously unequalled output power in the kW range with a compact design and various scaling and modification options.



Reliable quantification of the cw background of a pulsed laser: BIRD – Background-to-Impulse Ratio Detector

This measuring instrument is able to determine the continuous wave power share of the total power of a pulsed laser reliably. This information is very helpful for the development of pulsed lasers and also for monitoring pulsed lasers during operation. The unit can easily be integrated into existing systems.



Robust One-shot Short Coherence Interferometry ROSI

The "robust one-shot interferometry" (ROSI) developed at the University of Stuttgart has been optimized in several aspects and now offers a miniaturized, robust and long-term stable as well as high-precision point and line profile measurement at very high measurement and evaluation speeds. The system is particularly suitable for demanding applications such as inline inspection in industrial production.



Fully automated relocalization of areas of interest on any automated light microscopy system

This technique offers for the first time the possibility of reliable correlative microscopy by means of a cost-effective extension of existing systems. - Identify objects and view them in different systems without any offset!
This platform-independent method opens up a new dimension in automated microscopy and optimizes analyses in all areas of multi-scale imaging.



Glass perfectly covered or bonded – novel lamination of thin polymer layers on structured surfaces

With this new process, structured substrates can be laminated without damaging or narrowing the underlying functional structure. The method is simple and cost-effective, suitable for different materials and allows a free choice of precisely adjustable and stackable layer thicknesses.



‘Foveated Imaging’ from the 3D printer: Micro-optics with wide-angle and telephoto lens in a single device

Foveated imaging for conventional image sensors with constant pixel pitch, cost-effectively manufactured in the smallest space. The functionality of these optics can be compared to that of an eagle eye: despite high-resolution focusing, the viewer has a wide peripheral field of vision. This technology could revolutionize the world of miniaturized digital cameras, e.g. for medical imaging, autonomous driving and flying, and microrobotics.



Optimierte Filter zur Erkennung von Bildmerkmalen z.B. bei der Oberflächeninspektion

With these customized filter banks, error classifications with significantly higher selectivity and better detection rates can be achieved. The method can be easily integrated as software into existing systems for surface inspection.



Adaptive mini-lenses for high-resolution magnetic resonance imaging using integrated light microscopy

Thanks to a newly developed adaptive and interference-insensitive mini-optic, high-resolution magnetic resonance imaging can now be performed with integrated light microscopy. The combination also paves new ways for medical diagnostics.



Non-contact, simultaneous acquisition of topography and spectral data of an object

By cleverly combining two conventional methods together with a feedback strategy for mutual improvement, topography and hyperspectral measurements can now be performed in parallel on three-dimensional objects for the first time.



Refractive lenses of rolled and structured films for X-ray optical systems

The newly-invented X-ray lens allows the focusing of X-rays on a point focus of less than 10 µm diameter and also distinguishes itself through high transmissivity and low absorption losses. It is especially interesting for X-ray analysis processes for which a high radiation intensity is required since tenfold radiation intensities are achieved in the focus.
The lenses are easy to manufacture and thus cost-effective.



Simple splicing and reduced coupling losses when joining optical solid- and hollow-core fibers

Optical fibers are particularly well suited for long-distance data transmission, as the attenuation losses are significantly lower than e.g. when using copper conductors. Scientists at the University of Stuttgart  have now developed a simple and flexible method of joining solid- and hollow-core fibers that is characterized by low coupling losses and easy and flexible handling. In particular, it is suitable for liquid-filled hollow-core fibers. The method enables a durable, low-loss connection of fibers of different diameters without the application of heat required.