With the combustion process in pictures and videos, individual events as well as the intricate interplay thereof can now be unfolded before your eyes

Combustion Imaging

Combustion Visualized in Visible, UV and NIR Ranges

Today the combustion imaging technique is an integral part in the engine development. Without visualization techniques it is not possible anymore to develop new engine concepts.

SMETEC provides "Plug-and-Measure" camera systems including the combustion analyzer COMBI and a "All-in-One" software bundle with lots of features for image processing.

Different cameras can be chosen for different investigation purposes. CCD and CMOS cameras are suitable for capturing fuel injection. To capture flame propagation, however, high speed CMOS cameras are needed. NIR camera can be used to determine the surface temperature of the piston, spark plug and valves.

To investigate combustion flame in SI engines, all components of the imaging system should be UV capable as the luminosity of the combustion is characterized by the reaction of the OH-radicals which are almost exclusively in the UV-range.

UV camera

High visual resolution

In combination with the borescopy and the traditional combustion analysis, pictures of the spray development and shape can be obtained.

The high visual resolution however is especially suited for the spray analysis, where even small drops can be distinguished.

Spray droplet

Cooled borescope and optical probes

SMETEC offers standard and customized borescopes with various viewing and opening angles. Solid and flexible UV-Scopes are specially developed for viewing the combustion process in UV range.

Optical windows at the engine are necessary to protect the borescope or the illumination probe against pressure and temperature influences. Both standard borescopes and UV-Scopes are heat protected by air cooling. In addition the UV-Scope has a temperature transducer.

All-in-One optical probe is specially designed for illumination and visualization via one optical access to the combustion chamber without any reflections. The enormous advantage with this probe is the compact design which does not need additional access through the complex cylinder head.

All-in-one probe


Spray formation
Flame propogation
Knock wave

Spray formation

Flame propagation

Knock wave


CCD camera

Max. resolution

1360 x 1024 pixel

Frame rate

15-25 fps

CMOS camera

Max. resolution

1024 x 1024 pixel

Frame rate

2,000 - 540,000 fps

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