High-Speed 3D Measurement Systems

Highly dynamic 3D shape capture for metrology and quality assurance with GOBO projection and LED-based multi-aperture pattern projection

 

The Imaging & Sensing department at the Fraunhofer Institute for Applied Optics and Precision Engineering IOF conceptualizes and realizes optical 3D measurement systems for various applications based on modern imaging 3D measurement methods (pattern projection, stereo image processing, photogrammetry), digital projection techniques (LCoS, DMD, OLED), new micro-optical projection techniques (array projection) and adapted software concepts.

Possible applications for optical 3D measurement systems are wide-ranging and include quality assurance in tool and mold making, the optical industry, mechanical engineering, the automotive industry, medicine and criminalistics.

 

Using the system name goSPE3D, the Imaging & Sensing department develops and manufactures high-speed 3D measurement systems for the automotive industry.

With the systems goCRASH3D, the system family is supplemented and completed by acceleration-resistant, robust 3D measurement systems that can also be moved during system tests. These systems can withstand accelerations of up to 60g.

Innovative approaches are being developed at Fraunhofer IOF to meet the increasing demands on 3D image rates. By using micro-optical array projection techniques and advanced pattern projection methods such as GOBO projection, impressive 3D measurement rates of up to 50,000 data sets per second with up to 1 million 3D pixels are achieved. These technologies allow us to poignantly capture highly dynamic processes such as airbag deployment and moving scenes in three dimensions and to further process the data effectively for metrology and quality assurance tasks.

Our services

Fraunhofer IOF offers customized system solutions that seamlessly integrate optical metrology into automated manufacturing and testing processes.

  • Tailor-made development and production of high-speed 3D measurement systems according to individual customer requirements
  • Seamless integration of metrology into existing processes
  • Implementation of highly dynamic 3D measurements as a service, even in challenging situations or harsh environments

Many applications in in-line production monitoring, machine-integrated 3D measurement, 3D measurement of moving persons in medicine and sport and security technology (3D person recognition) require a 3D frame rate of more than 30 3D images per second. This is often not feasible with conventional image recording and projection techniques. To address this problem, Fraunhofer IOF is developing completely new approaches using micro-optical array projection techniques and new pattern projection methods (e.g., GOBO projection) that enable pattern projection of up to several kHz. Using array projection technology, 3D measurement rates of 1500 3D images / second with 1 million 3D pixels each have been realized to date. Using high-speed camera systems in conjunction with GOBO projection systems, 50,000 3D images / second with 250,000 3D pixels each have already been realized. This will make it possible to capture highly dynamic processes and moving measurement scenes in 3D and compare them with simulation results in future.

Applications of our high-speed 3D measurement systems

 

Our high-speed 3D measurement systems offer a wide range of applications, including three-dimensional measurement of highly dynamic processes, in-line 3D measurement, machine-integrated 3D sensing, measurement of moving objects, hand-held sensors, measurement of people and motion analysis on humans (kinesiology), crash tests and deformation analysis as well as measurement of highly dynamic scenes and large measurement fields. With our systems, we are able to carry out precise and detailed measurements in various areas.

 

Highly dynamic 3D metrology with GOBO projection

goSPE3D – 3D measurement system for highly dynamic measurement scenarios – system with analysis unit
© Fraunhofer IOF
goSPE3D – 3D measurement system for highly dynamic measurement scenarios – system with analysis unit

Measurement principles

  • Contactless optical 3D measurement without surface manipulation
  • Active high-speed pattern projection of the measurement scene using aperiodic sinusoidal patterns
  • Triangulation-based 3D measurement system with structured illumination
  • Simultaneous, stereo-based image recording with high-speed cameras
  • 3D coordinate calculation by correlating an image sequence of aperiodic sinusoidal patterns

Features

  • GOBO (Graphical Optical Blackout)-based high-speed projection of aperiodic sinusoidal patterns
  • Measurement principle enables 3D rates of up to 50,000 3D data sets per second (50 kHz) / s when using suitable high-speed cameras
  • Simultaneous image acquisition with high-speed cameras
  • Typical measurement fields: 700 x 700 mm² up to 2,500 x 2,500 mm² (depending on the application, other measurement fields can also be realized)
  • Illuminance: up to 30,000 lx
  • Typical measurement distances: 1,000 mm up to 3,000 mm (depending on application, other measurement distances can also be realized)

Our services

  • Development, production and transfer of measurement systems according to customer-specific requirements
  • Process integration of measurement technology into planned or existing processes
  • Implementation of 3D measurements as a service in highly dynamic situations or harsh environments

 

Crash-resistant 3D measurement system

goCRASH3D – ultra robust 3D projection system for use in highly dynamic measurement scenarios (acceleration-resistant up to 60g)
© Fraunhofer IOF
goCRASH3D – ultra robust 3D projection system for use in highly dynamic measurement scenarios (acceleration-resistant up to 60g)

Measurement principle

  • High-speed pattern projection via LED clocking in the ms range

Features

  • Robust measurement system due to monolithic design of the projection system
  • Various types of pattern projection possible depending on the application, including pattern overlay
  • Measurement speed largely dependent on the camera system used
  • Application-related enlargement/reduction of the multi-aperture projection system, combined with an adjustment of the light intensity, possible

Our services

  • Realization of customer-specific high-speed 3D measurement systems
  • In-line 3D metrology
  • Process integration
  • Implementation of 3D measurements in highly dynamic situations
 

Downloads for product sheets on our research topics

 

Our data sheets summarise relevant information on our current research highlights in a compact and clear format. Use the download function to save interesting and relevant topics for later and to save important data and visualisations for later retrieval.

Do you have questions about our services?  

In a personal meeting, we will advise you on our (individual) range of services and our core competencies. Please contact us. 

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