imanto® - imaging tools

imanto® - imaging tools

imanto® - image analysis tools
© Photo Fraunhofer IWS Dresden

imanto® - image analysis tools

imanto® - TOOLS, SOFTWARE & APPLICATIONS,  Non-destructive screening, 100 % inspection and characterization
© Photo Fraunhofer IWS Dresden

imanto® - TOOLS, SOFTWARE & APPLICATIONS, Non-destructive screening, 100 % inspection and characterization by hyperspectral imaging

Imanto® provides an ideal platform to develop application- and customer oriented solutions for the spectroscopic and optical imaging technology. Apart from process monitoring systems, stand-alone applications and tailored customer’s solutions can be offered as well.

The imanto® platform comprises a unique system of hardware solutions and offers a flexible software platform with the possibility of chemical-statistical evaluation and solutions of your individual demands. The system operates in an on-line as well as in a real-time mode, as required.
 

Highlights of the imanto® platform

  • tabletop system imanto® obsidian
  • customized large-scale setups as well as at-line, on-line and in-line process setups
  • flexible lighting solutions imanto® lighting
  • hyperspectral microscope imaging imanto® microscopy for highest spatial resolution and with the option for near infrared range
  • software package imanto® pro for real-time data processing and evaluation, highly optimized for fastest calculations
     

Software imanto® viewer

For a closer look on hyperspectral data (i. e. in ENVI format) you can use our free imanto® viewer.

Service offers

Targeted adaptations allow a simple system adaption to the desired parameters. Thus the imaging technique enables almost a 100% control of your product or process, an advantage, which can be passed on.

Mikroskopische Leitfähigkeitsuntersuchung an der Kante einer leitfähigen Beschichtung
© Photo Fraunhofer IWS Dresden

Mikroskopische Leitfähigkeitsuntersuchung an der Kante einer leitfähigen Beschichtung

One step solutions - we develop according to your requirements!

  • adaption of HSI systems to your particular process
  • development of a specific data evaluation
  • tailored software

Targeted adaptations allow a simple system adaption to the desired parameters. Thus the imaging technique enables almost a 100% control of your product or process, an advantage, which can be passed on.

We will be pleased to give advice in solving your scientific questions. Allow us to provide you with a non-binding consultation!

Hyperspectral imaging - how it works

Hyperspectral imaging works as a line scanning system, but every spatial point will be split additionally into its spectral components. The resulting twodimensional image is subsequently mapped on focal plane array detector. For recording a complete sample, either the HSI system or the sample itself must be moved. The collected data are summarized in a data structure called “hypercube”.

Scheme of the spectral data acquisition process of a HSI system
© Photo Fraunhofer IWS Dresden

Scheme of the spectral data acquisition process of a HSI system

Different optic configurations for HSI systems
© Photo Fraunhofer IWS Dresden

Different optic configurations for HSI systems

Stainless steel substrate with aluminum oxide layer, left: spot lighting: primary beam reflections and the substrate’s grain structure are mainly visible, right: diffuse lighting on the same substrate: the Al2O3 thin film emerges and can be evaluated subsequently.
© Photo Fraunhofer IWS Dresden

Stainless steel substrate with aluminum oxide layer, left: spot lighting: primary beam reflections and the substrate’s grain structure are mainly visible, right: diffuse lighting on the same substrate: the Al2O3 thin film emerges and can be evaluated subsequently.

The working width of a hyperspectral imaging system mainly depends on the focal length of the used lens and the working distance (WD). Thus the field of view (FOV) of a few millimeters (microscope optics) up to several meters and more can be realized.

In HSI measurements the spectral and spatial resolutions are primarily influenced by the detector’s pixel number. The spatial resolution is further determined by working width, scanning speed of the HSI system and sample velocity. This means, that hyperspectral data may have two different spatial coordinates in dependence of the acquisition parameters.

A crucial point in hyperspectral image acquisition is the choice of an appropriate lighting. The lighting is decisive for a successful measurement. A spatial homogeneous brightness helps to achieve a reliable data set and to reduce efforts in data evaluation.

In accordance with the samples morphology and structure, a spot-, line- or diffuse lighting is applied for the measurements. Special cases are transmission or specular reflection setups, which are commonly used with a microscope optic.
 

Hyperspectral imaging

  • non-destructive, contact-free spatially resolved spectral measurements
  • more than 100 spectral bands
  • frame rates up to 1000 fps
  • different wavelength and information ranges: UV, VIS, NIR
  • various applications due to manifold combination/integration possibilities
  • additional information in combination of image interpretation and spectral evaluation

imanto® obsidian - starter kits and components

Hyperspectral measurements are diversified according to the wide application range for surface and imaging applications. If the application is once established, the benefits of hyperspectral imaging will remain. Successful measurements need profound know-how to achieve optimum results. The imanto® platform offers application oriented ready-to-use solutions with respect to hardware and software.

imanto® obsidian tabletop system
© Photo Fraunhofer IWS Dresden

imanto® obsidian tabletop system

Rugged 3-axis motorized large-scale setup
© Photo Fraunhofer IWS Dresden

Rugged 3-axis motorized large-scale setup

Tabletop system

Our tabletop systems are easy to use and ready for future enhancements of the measurement platform. By default, a x-stage is adapted to the system. In addition, the appropriate imanto® lighting option and the imanto® pro software package offer a complete hyperspectral imaging solution for the first steps in hyperspectral imaging spectroscopy.
 

Large-scale and process-line setups

Large-scale and process-line setups are customized according to your needs. However the modular system of the imanto® platform fulfills the requirements of an easily configurable system setup. All boundary conditions must be considered for the integration of a reliable measurement system. We provide assistance for all steps in process line integration:

  • task analysis & feasibility studies
  • HSI system and software adaption
  • data evaluation and development of data analysis models
  • process line integration (i. e. Beckhoff systems)

HSI monitoring systems can be integrated into existing as well as into upcoming process lines.
 

imanto® obsidian

  • configurable with imanto® lighting and imanto® pro components
  • tabletop system
  • durable construction components
  • flexible sample stages, up to 30 cm travel range
  • motorized z-axis (height)
  • large-scale and process line setup
  • 3-axis motorization, camera movement
  • dedicated control cabinets
  • process line integration (i.e. to conveyor belt)
  • accessory
  • customized measuring tables (vacuum option) and HSI system take-up

Hyperspectral Microscope Imaging

Since the spatial resolution of standard lens combinations for hyperspectral imaging systems is limited, Fraunhofer IWS offers a solution for the combination of HSI and microscopy for the UV/VIS as well as for the near infrared spectral range. Thus the microscope hardware becomes very flexible: filters and polarizers can be integrated into the beam path; the eye-piece can be used in alteration with the HSI system without any hardware change.

imanto® microscopy system
© Photo Fraunhofer IWS Dresden

imanto® microscopy system

imanto® microscopy

  • NIR and UV/VIS imaging in one system
  • spatial resolving capacity: < 200 nm UV/VIS; < 2 μm NIR
  • specular reflectance and transmission measurements
  • motorized 3-axis workbench
  • fourfold nosepiece
  • use of standard microscope lenses
  • optional: integration of filters and polarizers

imanto® lighting

For several imaging and spectral applications a broadband lighting is necessary for the acquisition of full information depth. The halogen lighting covers the full spectral range from visual up to the near infrared (VNIR, SWIR) range.

imanto® lighting (80 cm working width), for HSI-digitalization of cultural-historical valuable writings
© Photo Fraunhofer IWS Dresden

imanto® lighting (80 cm working width), for HSI-digitalization of cultural-historical valuable writings

imanto® lighting in a small configuration (24 cm working width; integrated into a imanto® obsidian system)
© Photo Fraunhofer IWS Dresden

imanto® lighting in a small configuration (24 cm working width; integrated into a imanto® obsidian system)

Ausschnitt eines imanto® lighting Systems
© Photo Fraunhofer IWS Dresden

Ausschnitt eines imanto® lighting Systems

Flexible lighting solution

Beside common line lights and spot lights, which are also available for imanto® obsidian setups, many tasks require a homogeneous lighting. The imanto® lighting solutions provide a diffuse lighting like a standard integration sphere with optical access for the HSI-system. A flexible setup allows the adaption to almost every working width. High quality components enable a long-term operation.

All lighting solutions are ready-to-use and will be combined with specially designed and stabilized power sources. For the latter, also power sources with constant output for process tasks are available as well as adjustable power sources for research tasks.

Depending on the size, the spheres are either fully made of optical PTFE or internally coated with optical PTFE. A high reflection of ≥ 98 % for the whole UV/VIS and near infrared spectral range enables the imanto® lighting device to easily perform reliable measurements. The designed working width of up to 80 cm shows a homogeneity of illumination of > 95 percent.
 

Measure reflecting substrates

Hyperspectral measurements of high specular reflecting materials such as metal substrates and others require a very homogeneous lighting for a high data quality for evaluation. Otherwise the reflection intensity superimposes the spectral information from the UV/VIS- and NIR-range by overexposure of the detector.
 

imanto® lighting

  • spectral range 250 – 2500 nm
  • material optical PTFE ≥ 98 % reflection
  • homogeneity > 95 %
  • working width up to 80 cm
  • exit slit width 1 – 5 cm / adjustable
  • unit power 40 – 300 W
  • # sources 2 - 6 per unit

imanto® pro

For an easily and efficiently use of the broad potential of HSI, Fraunhofer IWS developed a software package for scientific and industrial use. In standalone tasks the spectroscopic characteristics come to the fore and additional efforts must be done for data exploration and analysis. The imanto® pro software package offers the full acquisition and measurement control. All spectroscopic measurement setups are supported – from emission to transmission and several reflection setups. In combination with the possibilities of the timeresolved (“staring imager”) and spatial-resolved measurement modes, a very flexible software solution for all essential HSI-data processing steps is provided.

imanto® pro user interface
© Photo Fraunhofer IWS Dresden

imanto® pro user interface

Graphical user interface

  • simple, intuitive interface
  • receipt concept
  • multi-data screen
  • interactive data evaluation

Interoperability

  • any multi- and hyperspectral camera can be integrated
  • data format: ENVI, generic HSI.JPG
  • spectra and picture export
     

Data pretreatment

  • offset correction (dark image)
  • background correction (bright image)
  • fault pixel correction
     

Supported measurement setups

  • supported movement systems: x-stage, cross-stage, conveyor belt
  • supported measurement modes: diffuse and specular reflection, transmission, emission
  • macroscopic and microscopic measurements
  • time-resolved measurements (staring imager setup)
  • continuous measurements
     

Special features

  • use of chemometric models, such as SVM, PCA, LDA, QDA, cluster analysis
  • integration of third-party modules: CAMO® classification engine, Intel® MKL, Extreme OptimizationTM
  • on-line data processing

Thin film inspection

The monitoring of thin film parameters can be a crucial point in a coating process. In contrast to crosssection SEM or ellipsometry hyperspectral imaging allows the in-line or at-line monitoring of the entire thin film. The properties of thin film samples are calculated by using the concept of beam propagation in layered media. In dependence of the nature of the thin film either the UV/VIS and/or the NIR spectral range is used for data evaluation.

Al2O3 thin film on stainless steel substrate; left: photo; right: thin film thickness profile
© Photo Fraunhofer IWS Dresden

Al2O3 thin film on stainless steel substrate; left: photo; right: thin film thickness profile

Analysis of conductivity of a TCO layer (ITO) by hyperspectral imaging; above: photo; below: calculated resistivity image
© Photo Fraunhofer IWS Dresden

Analysis of conductivity of a TCO layer (ITO) by hyperspectral imaging; above: photo; below: calculated resistivity image

For highest acquisition rates and fast in-line measurements the data analysis can be accelerated and combined with individual multivariate, mathematicstatistical algorithms. Multivariate data analysis can also obtain and control the process parameters. Therefore the statistical models must be trained by single parameters measurements.

Hyperspectral imaging setups for thin film inspection can be realized with the imanto® obsidian hardware or imanto® microscopy combination.
 

imanto® thin film analysis

  • spatial resolved parameters
  • thin film thickness (nm up to μm)
  • sheet resistance (only conductive materials)
  • refractive index (n, k)
  • failures, defects
  • quality parameter distributions
  • substrate materials
  • bulk metals, metal foils
  • Si-wafer, semiconducting materials
  • polymer webs
  • glass
  • thin film materials
  • inorganic: (conductive) oxides, nitrides, carbides etc.
  • organic: dyes, oils, fat etc.
  • polymers and composites
  • ultra-thin metal coatings

Surface imaging

Surface analyses are commonly found in process and quality control application tasks. The ability of detecting hidden features helps to evaluate the product or process step. In combination with an automated statistical analysis a defined yes/no decision can be done. For surface imaging applications hyperspectral imaging offers in UV/VIS and in NIR spectral range appropriate information.

Laser scribed OPV device, left: HSI image (590 nm), right: classified image (yellow – active layer, blue – ITO, dark blue – damaged base layer)
© Photo Fraunhofer IWS Dresden

Laser scribed OPV device, left: HSI image (590 nm), right: classified image (yellow – active layer, blue – ITO, dark blue – damaged base layer)

SiO2 coated Ti-alloy, a smart data evaluation leads to corresponding wedge test results within 1 minute
© Photo Fraunhofer IWS Dresden

SiO2 coated Ti-alloy, a smart data evaluation leads to corresponding wedge test results within 1 minute

imanto® surface imaging

  • contamination screening
  • greasy contaminations
  • impurities, foreign matter
  • emission measurements
  • plated metals
  • surface quality
  • cracks, holes, gaps
  • roughness
     

Laser scribing

For organic electronics the defined laser ablation is important for structuring OPV components and others. HSI offers significant potential to analyze the homogeneity and penetration depth of the scribes and the integrity of the layer below.
 

Adhesive strength

Full surface imaging is mandatory for control of component parts for bonding. IWS scientists developed a method for the prediction of the adhesive strength by HSI inspection of the surfaces to be bonded. Significant advantages are non-destructive testing, fast measurement and prior knowledge in respect to the well-known wedge test.

Component testing

The bandwidth of possibilities for component testing ranges from active layer control to surveillance of uniformity of printed microstructures. It is possible to define particular quality parameters for every task – just right out of the HSI data set.

Left: NIR-image (1302 nm) of an experimental OLED-device, right: control of printed “donut” polymer structures
© Photo Fraunhofer IWS Dresden

Left: NIR-image (1302 nm) of an experimental OLED-device, right: control of printed “donut” polymer structures

Barrier foils, left: evaluated HSI images, right: predicted WVTR by HSI (purple) in comparison to reference measurements (HiBarSens®, orange)
© Photo Fraunhofer IWS Dresden

Barrier foils, left: evaluated HSI images, right: predicted WVTR by HSI (purple) in comparison to reference measurements (HiBarSens®, orange)

WVTR inspection

The use of all information of the acquired spectra and their distribution offers the possibility to estimate the water vaper transmission rate (WVTR) for barrier webs. The measurement time decreases by several orders of magnitude.

Sorting

The main tasks for HSI sorting applications are established in the food industry and polymer sorting. Especially the NIR spectral range offers access to chemical information of the materials. The real-time ability of the data analysis is important for these applications. Chemometric data analysis algorithms are implemented for this task, in certain cases simpler evaluations, based on spectral intensity levels, can also be used. The extracted information can be subsequently transferred to sorting machines or other process line machines.

Left: contaminated polymer fraction (POM@TPE); right: sorted POM
© Photo Fraunhofer IWS Dresden

Left: contaminated polymer fraction (POM@TPE); right: sorted POM

HSI study of a drill core; left: greyscale image; middle: NIR image; right: classification of different materials
© Photo Fraunhofer IWS Dresden

HSI study of a drill core; left: greyscale image; middle: NIR image; right: classification of different materials

imanto® sorting, recognition and classification:

  • target parameter:
  • material type
  • aging, imperfections (i. e. food)
  • purity and foreign matter
  • all kind of powders, regrinds, pellets and granulates
  • polymers:
  • household: PE, PP etc.
  • technical: PAx, PC, ABS etc.
  • food:
  • crop: barley, wheat, rye etc.
  • fruit and vegetables: apples, nuts, peas etc.
  • meat
  • pharmaceutical and chemical products
  • pills, powders and granulates
  • minerals

Recognition and classification

Granulate of different process states, left: visual image, right: processed HSI images
© Photo Fraunhofer IWS Dresden

Granulate of different process states, left: visual image, right: processed HSI images

Left: with LINDAN impregnated and untreated wood, right: HSI spectra; the high intensity levels of the impregnated wood (green, blue) correspond directly to the absorption peak in the shown spectrum
© Photo Fraunhofer IWS Dresden

Left: with LINDAN impregnated and untreated wood, right: HSI spectra; the high intensity levels of the impregnated wood (green, blue) correspond directly to the absorption peak in the shown spectrum

Ancient document with stubborn stains, HSI enables librarians to reconstruct the original text (small insertions).
© Photo Fraunhofer IWS Dresden

Ancient document with stubborn stains, HSI enables librarians to reconstruct the original text (small insertions).

A further sorting related task is the recognition and classification of materials – for example to inspect dedicated substance content. These tasks are not mandatorily coupled to a sorting process. To achieve a defined result, the spectral data will be usually processed by mathematical-statistical algorithms. Fraunhofer IWS will provide any assistance for a tailored solution for your task. In combination with the imanto® pro software an easy-to-use user interface and software module for all steps of recognition and classification is available.
 

Batch process control

In batch processes, HSI is able to determine the process state and ending point by using spectral and spatial data evaluation in a combined algorithm. Furthermore the results offer the possibility to influence the batch process for optimal results.
 

Powder purity

The quality and purity control of powder mixtures is an important task in many chemical processes. Beside crystalline and amorphous powders also metal powders for additive manufacturing processes can be assessed.
 

Wood impregnation

In the past decades wood was often impregnated with toxic substances such as LINDAN, PCP or DDT. To avoid skin-contact a HSI-based screening of roof frames prior to restauration provides information about possible toxic substances and their spatial distribution.
 

Genuineness of documents

Hyperspectral measurements are, due to their spectral imaging, perfectly suited for verification of the authenticity of documents. Multiple hidden features in the documents can be perfectly visualized. In combination with pattern recognition, multiple features can be analyzed. VIS and NIR spectral ranges are applicable in dependence of the document type. Examples are banknotes and counterfeit recognition as well as restorations of ancient documents and their clear assignment to an author or artist.