Spectral sensors

Spectral Sensors

A spectral sensor, which is often called a “spectrometer module”, is used for the spectral analysis of light. This technology is subsumed under the general term of optical spectroscopy. A spectral sensor consists of a [diode array-] detector, a fixed grating for the decomposition of the light and additional optics, which are combined in a compact housing. Thanks to robust light guides a flexible integration in a customized instrument design is very easy.

There are various parameters, which characterize a spectral sensor, such as the spectral range, the resolution, the sensibility or even the size of the module. The spectral range usually starts in the UV [at approx. 180nm] includes the visible range [VIS] and the NIR [MIR]. Depending on the spectral range and the sensitivity different detector types are used, such as NMOS [within the Carl Zeiss versions MMS, CGS und MCS], CCD [MCS Flex, CGS], CMOS [CGS] for UV–VIS and InGaAs [PGS NIR] for NIR applications. Most of the used detector chips are supplied by the Japanese company Hamamatsu.

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Spectral Sensor Process

The spectrometer modules from Carl Zeiss have a compact and monolithic design. As they do not have any movable parts and the materials are optimized concerning thermal issues these components are extremely robust, long-term stable and service-free. High-speed measurements down to milliseconds level are possible. Because of the above characteristics these spectral sensors perfectly fit for applications in rough process environment or for mobile use on the field [e.g. build on a harvesting machine in agriculture or remote sensing tasks] Multispectral Imaging can be performed by a line sensor, which gives an average spectra of a certain area or a 2-dimensional area detector [or hyperspectral sensor] which gives a multispectral picture or image.

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Spectral Sensor Industrial

tec5 offers high-performance operating electronics for industrial use which are optimized for high dynamics, high signal-to-noise and demanding timing requirements. Various interfaces to the PC such as USB, Ethernet and PCIe are offered. The newest generation of sensors systems from tec5 uses the embedded platform tecSaaS® CB [System As A Sensor]. An additional PC is not needed anymore to operate the spectrometer unit. The data evaluation takes place on the embedded board and the result is transferred via a standard process interface like e.g. ModBus/TCP to a PLS. This design fits very well to the concept of smart sensor systems according to the Industry 4.0 initiative.

Spectral Sensor Raman

Raman spectroscopy is an important analytical method, which is widely used in laboratories worldwide. The goal of tec5 is to bring this technology into the process close to the line. With the MultiSpec® Raman system a robust and stable process sensor is offered, capable of multichannel measurements in industrial environment.

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