Physics, Metrology & Control Engineering

Precise measurement technology is a prerequisite for reliable process and product engineering processes. PROvendis offers attractive technologies from the fields of physics, metrology and control engineering for licensing, to purchase or for development cooperation.

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Optical magnetometer current measuring system

Optical current measuring systems are one way of measuring electric current touchlessly and contactlessly. They use light to determine current precisely. The advantage is that optical transformers are compact, saturation-free, linear, and high-precision. They can detect very large and very small currents in a broad frequency range.

Diagnostic tool for plasma processes

Low-temperature plasmas are used in semiconductor and medical technology and surface engineering. Production process precision and production reproducibility are a growing challenge, especially in semiconductor technology, where components are becoming increasingly smaller.

Active interference-suppressed power electronics

High-frequency circuits can cause electromagnetic emissions that impair other electronic systems. In power electronics, it is therefore often necessary to suppress EMC interference by such means as active narrowband filters.

3D ambisonic microphone

Home theater, gaming and VR applications increasingly rely on three-dimensional surround sound, however, low and very low tones in particular are inadequately reproduced.

Retrofit polarization-maintaining in optical fibers (PM)

The invention of the University of Bonn relates to the development of a method to retrofit polarization- maintaining (PM) optical fibers in a way, that a routinated achievement of polarization to a degree better than 10-5 in extinction ratio takes place.

UHV-glass cell

The invention consists of a glass cell featuring an ultra-low birefringence (around 10–8) with an outstanding optical access due to its compact dodecagonal shape.

Adaptive Controller

The invention makes optimum use of continuous-value manipulated variables in a closed-loop control system. In this way, the control behavior is improved because the controlled system operates less erratically. As a result, energy consumption and wear are significantly reduced and user comfort is increased.

Antireflective integrated optical waveguide

In transitions between dielectric optical waveguides of different thickness, it comes through modal mismatch usually to radiation losses and optical backscatter.

Open FET Sensor

The Open FET sensor is a field-effect-based sensor in which the gate electrode is connected only to the signal to be measured and not as usual to other electronic components.

WiMDaD Wire Mesh Damage Detection

Composite materials are nowadays used in many technical fields. Blades of wind power plants or aircraft parts, for example, are made out of these materials.

Quick, low-cost refractometer

In order to adapt optical systems and lenses precisely to an application, it is necessary to know the material properties and the optical parameters of the lens material. A new method developed by Düsseldorf University of Applied Sciences determines the dispersion (wavelength dependence of the refractive index) using a simplified setup without moving parts and even without a wavelength scan.

Scalable photodetector

Most optical sensors require an external supply voltage - not so the novel scalable photodetector from the University of Duisburg-Essen. This photodetector can also be processed or manufactured on a foil basis using the MOCVD process. Possible applications include implants without a battery for medical technology.

Polymer GRIN

The invention describes a new manufacturing process for GRIN plastic optics, in which extruded films with a defined refractive index gradient are rolled up and sintered. This makes it possible to manufacture lenses with any aperture and adjustable refractive index variation.

Wiegand position encoder with Gray code generation

A new technology from the FH Aachen describes a rotation angle sensor for determining the absolute position by means of several Wiegand sensors. The transitions detected by the Wiegand sensors are used in an evaluation circuit to represent the angle of rotation in a Gray code.

EPIC spectrometer

Spectral analysis is used in many areas of measurement technology. But it often requires very large, expensive devices.


New analytical method for quantification in lightweight materials such as plastics, polymers or refuse-derived fuels using X-ray fluorescence analysis.

Wireless water leakage detection

The battery- and wireless sensor system from the University of Paderborn detects water leaks in buildings, heating systems or the water supply. The permanent and maintenance-free monitoring of bathroom seals, washing machines, basement rooms as well as any kind of water-bearing pipes can be realized reliably and cost-effectively.

Optical magnetometer

The invention can optically measure magnetic fields with high sensitivity and can be used, among other things, for soil investigations, navigation systems or material investigations. The method from the University of Siegen can also be integrated into existing fluorescence microscopes.

Vector spectrometer

An improvement in high-resolution gigahertz and terahertz spectroscopy, now enables sensitive measurements of high-frequency signals over a wide spectral range. The application areas for this technology are in chemical analysis as well as quality control: The sensitivity in the measurement of analysis samples with high-frequency signals can thus be significantly increased.

Electrooptical mixer

Electrooptical mixers are optoelectronic components used in data transmission via optical fiber The novel electro-optical mixer from the University of Paderborn is switchable, smaller and offers improved noise performance, making it of interest to infrastructure equipment suppliers in telecommunications, among others.

Selective ion storage

The measurement of molecular spectra is important for the chemical or pharmaceutical industry. The new method from the University of Cologne is suitable for the acquisition of any kind of spectra of ion species such as rotational, vibrational, Ro-vibrational, electronic spectra. The composition of the spin states of electrons and nuclei can also be determined. This opens up completely new areas of application.

Optical power supply

Quantum optical detectors are one of the markets of the future, but these detectors need to be heavily cooled. The novel system uses optical fibers for the energy supply, thus avoiding thermal bridges that occur with the usual use of copper lines. The photodiode then generates the required operating voltage for the detector from the light.

Improved satellite navigation

Position determination is of great commercial benefit for motor vehicles in logistics or agricultural technology, among others. A multi-antenna receiver system designed as a ballast at Münster University of Applied Sciences can enable high-precision position determination with conventional GNSS receivers down to a few centimeters.

Wiegand position encoder

Rotary encoders or incremental encoders are used in a wide range of industrial applications. An invention from the FH Aachen makes it possible to measure the angle of rotation or the rotational speed with the aid of a Wiegand sensor, which can be designed as a relative or absolute sensor, and a rotor that can be manufactured at low cost.

Improved "pump and probe" measurements

Optical pump-probe experiments are often used in spectroscopy and metrology. A new technology from the Ruhr-Universität Bochum allows to electrically control the sequences of excitation and interrogation pulses or the delay time between them. The advantage: No moving parts are required and no intervention in the laser resonator.

PLL frequency acquisition

The new and ASIC available PLL circuit of the University of Paderborn can be used in communications or control and measurement technology, especially where a permanent slow sine signal is used e.g. Bang-bang PLL, Hogge PLL, Baud rate CDR, Optical transceivers circuits.

Solar capsule

Solar energy is generated from solar panels or photovoltaic systems in solar farms or on house roofs. An invention by the University of Siegen based on a dye-sensitized solar cell (DSSC) now makes it possible to manufacture affordable thin-film solar cells that can be applied to any surface like paint.

Quantum Dot Arrays

Nanostructures are suitable for the fabrication of optoelectronic devices, but their fabrication is costly. Their utility, however, is immense: mode profiles can be created in a direct way, for example, to "attract" lasers or to adjust densities for single quantum dot applications such as single photon sources.

Photoacoustic gas sensor

Gas sensors are used for the detection of gaseous substances. Resistive measurement methods are often used, but their signal values often exhibit drift due to aging or lose selectivity. A new type of photoacoustic gas sensor (PAS) from the Technical University of Dortmund is different: it detects target gases very precisely and selectively.

Laser absorption spectroscopy

The new method from TU Dotmund uses laser absorption spectroscopy to monitor air quality in order to measure trace gases present, such as methane or CO2. The improved intra-cavity absorption spectroscopy allows the application in measurement technology, industrial process monitoring as well as safety engineering.

Optical Strain Gauge

The novel and all-optical strain measurement method is highly accurate and cost-effective. The strain is determined by means of an optical fiber-based purely optical method and thus also enables use in harsh application fields, such as explosion-proof areas or where disturbing pulsating magnetic fields interfere with conventional strain measurement sensors.

Diamond Schottky LED

LEDs are used today in a wide variety of applications, including lighting, data transmission, and biological processes. However, the commonly used LED materials are unsuitable for many applications. By using doped diamond, these LEDs can be designed specifically for high temperatures or pressures and especially for applications with special requirements, e.g. in optical metrology.

Substitute for LIDAR sensors

Optical components like photodiodes have a variety of uses in sensors and telecommunications technology. Even with time-of-flight sensors, the light reflected by objects has to be converted into electrical signals in order to compute the distance or speed of said objects.

Interference filter

Many optical systems, devices and sensors use the principle of interference - an essential factor in the development and optimization of thin-film devices.

Digital Power Factor Correction

By using this new digital power factor correction, the electromagnetic interference in power electronic systems such as battery chargers, plug-in power supplies, computer power supplies or e-bike chargers can be significantly reduced.

Microwave thermograph

The new method for microwave thermography uses a commercially available HD optical camera and an indicator plate to convert the microwaves into a high-resolution, digital field distribution. The developed indicator plate allows microwave thermography between 1 GHz and 300 GHz.

CMOS biosensors

Production process for a highly sensitive biosensor made from a crossed nanowire-structure field-effect transistor. The cost effective CMOS compatible production process allows for e.g. biosignal monitoring of molecules like c-reactive protein (CRP), cardiac troponin (cTnI), electrogenic cells, or peptides such as amyloid-beta.

Lock-In Amplifier

Lock-In amplifiers are firmly anchored in everyday research. They offer excellent noise suppression for repeating signals. The degree of suppression, however, depends critically on the low-pass filter at the end of the signal processing chain.

Window for high temperatures

For the monitoring of highly complex processes in closed reaction vessels, it would often be desirable to be able to observe the process and monitor it by means of optical measuring systems.

On the trail of plasma

Plasmas are used in a wide range of technical applications, including semiconductor technology. Plasma etching and plasma-induced material deposition are used to remove functional layers in a structured manner or to selectively generate surface hardening, cleaning and activation on the target surface.


The electrical power grid is undergoing a major transformation. Increasing numbers of decentralized feeders have been added in recent years and, in the future, there will be a large number of charging stations for electric vehicles that temporarily draw a large amount of electrical power from the power grid.