Rotating Filter and Aperture Wheel
of the ImageIR® Camera Series

Adaptation of the Camera to the Spectral Characteristics of the Object

The design of the ImageIR® thermographic camera enables the implementation of up to two rotating filter wheels and rotating aperture wheels, which can be controlled independently. The two motorised wheels allow up to 30 filter /aperture combinations, which can be fitted individually. The selection of the desired combination of the two wheels is completely remotely controllable from the corresponding menu of the camera operating software IRBIS® online.

The combination of separate rotating filter and aperture wheel positions is the prerequisite for universal use for measuring tasks in the spectral thermography sector. Spectral filters can be used to adapt the sensitivity range of the camera to the specific spectral characteristics of the measured objects, for example:

  • Optimised measurement of the surface temperature of shining metals, glass, plastics and other materials
  • Measurement of objects behind glass, gases or flames
  • Capturing flames and gases

The effects of interference are securely prevented by aperture or grey filters, used for signal monitoring and arranged in close proximity to the detector, or by their combination with spectral filters. Furthermore, wide temperature measuring ranges can be achieved with or without spectral filter equipment.

The use of aperture or grey filters enables temperature ranges up to 3,000 °C. The combination of two spectral filters (short-pass and long-pass) results in further options of spectral thermography, for example, by means of narrow-band camera sensitivity, the use of specific absorption bands of the objects (thin films and gases) to collect their surfaces or volume radiation.

A further equipment option is the installation of a rotating filter wheel with up to 5,400 rotations per minute. This allows the implementation of a real-time MicroScan unit to quadruple the number of pixels and to increase the spatial resolution accordingly. Furthermore, this fast rotating filter wheel can be fitted with filtering components to condition signals, which allow the measurement of objects with extremely high temperature gradients by means of the so-called HDR technology (High Dynamic Range).

If this fast rotating filter wheel is combined with the second rotating aperture wheel or rotating filter wheel, further conditioning or spectral filtering components can be implemented. The customer-specific filtering components are coordinated individually in order to meet the customer requirements.

InfraTec glossary - Rotating filter- und aperture wheel

Rear filter / aperture wheel:
0 = open
1-3 = spectral filter
4 = grey filter

Front filter-/ aperture wheel:
0 = open
1-2 = grey filter
3 = aperture diaphragm
4 = spectral filter

Overview of Benefits

  • Expansion of the measuring range to the physically achievable limits: (-40 … 3,000) °C
  • Use of spectral filters for special applications
  • Combination of spectral filters and dampening filters through the installation of two independently controllable wheels, therefore extended spectral measuring ranges are possible
  • Completely motorised remote control from the camera operating software IRBIS® 3, contactless filter control is also possible even from greater distances
  • A complete replacement of the filter module by the customer is possible to expand the diversity of the camera

Application Examples

  • Customer-specific configurable rotating filter wheels / rotating aperture wheels enable the adaptation of the ImageIR® to the most diverse measuring tasks
  • Optimised measurement of glass surfaces or objects behind glass
  • Detection of flames and gases as well as measurement of objects behind flames and gases
  • Use of sun reflex filters for the prevention of interference radiation
  • Real-time measuring range expansion due to HDR functions for the measurement of temperature-dynamic objects
  • High temperature measurements in the field of welding and laser technology

Relevant Indus­tries & Applic­a­tions

  • thermal imaging for automotive applications
    Automotive Industry

    Automotive Industry

    Infrared camera systems help you to secure a high product quality in production and at your suppliers.

  • thermal imaging in aviation
    Aerospace Industry

    Aerospace Industry

    Comply with highest security demands by applying state-of-the-art infrared camera systems.

  • thermal imaging in metallurgy


    Efficiently reduce the energy consumption of your metallurgic processes using infrared camera systems.

  • thermal imaging in chemical industry
    Chemical Industry

    Chemical Industry

    Systematically control reactive process heat and display with infrared camera systems of InfraTec.

  • thermal imaging in plastic industry
    Plastics Industry

    Plastics Industry

    Cost-efficiently control die-casting and extrusion processes by means of infrared camera systems.

  • thermal imaging in glass industry
    Glass Industry

    Glass Industry

    Measure correctly temperature distributions behind and on glass by using selected spectral filters.

  • thermal imaging for environmental studies
    Environmental Studies

    Environmental Studies

    Look for smallest temperature differences in landscapes, biotopes and labs using infrared camera models of highest measurement precision.

  • high-speed thermography
    High-Speed Thermography

    High-Speed Thermography

    Get even faster and analyze temperatures at highest process speeds.

  • InfraTec - Additive manufacturing for process control
    Additive Manufacturing

    Additive Manufacturing

    By in-line monitoring of thermal process parameters, infrared cameras from InfraTec support the optimisation of additive manufacturing processes.

  • Laser Industry

    Laser Industry

    High-end thermography in heat-generating laser applications in materials processing.

  • thermal imaging for material testing
    Material Testing

    Material Testing

    Save time and costs by non-destructively testing components with infrared camera systems by InfraTec.

  • spectral ir thermography
    Spectral Thermography

    Spectral Thermography

    Using precision filters for specific applications you will measure exactly those spectral ranges being of interest to you.

  • Active Thermography - Picture Credits: © Rainer /
    Active Thermography

    Active Thermography

    Make use of active thermography for non-destructive and contact-free material testing, for both automated inline and offline solutions.

  • InfraTec Bondung and Sealing - Hot gas
    Bonding and Sealing

    Bonding and Sealing

    Users can utilise infrared cameras during bonding and sealing to monitor and control various technological parameters. This includes the geometry of the adhesive application, adhesive temperature and adherend temperature, curing temperature as well as the adhesive bond.

  • thermography for aerial photography
    Aerial Thermography

    Aerial Thermography

    Detect persons and objects in the field or monitor wide-area geologic properties or environmental damages.

Get in contact with InfraTec thermography division

Would You Like to Know More?

It is not unusual for tasks to be associated with special requirements. Discuss your specific application needs with our specialists, receive further technical information or learn more about our additional services.

United States

InfraTec infrared LLC
75024 Plano, TXUSA