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Background <p>The development of high-speed camera technologies allows phenomena that occur at high speeds to be visualized and analyzed with precision. To ensure the quality of the results and provide metrological traceability, it is important that the camera is calibrated in the time parameter. This work proposes a traceable calibration methodology for high-speed cameras.</p> Methods <p>The calibration was conducted using an indirect method in which a laser emits controlled pulses in a 2500&#xa0;Hz square wave. These pulses are monitored by an oscilloscope while simultaneously being captured by a camera. By comparing the pulses recorded by the oscilloscope with those captured by the camera, the calibration results are determined, and an uncertainty analysis is developed.</p> Results <p>With the proposed method, the calibration range was from 5400 fps to 400.000 fps, with an uncertainty of 0.02% at maximum frame rate and the main source of uncertainty comes from the calibration of the oscilloscope.</p> Conclusion <p>A detailed uncertainty assessment shows traceability and the quality of the results and the presented calibration method allows for the calibration of cameras up to 400,000 fps, making it suitable for a wide range of dynamic testing applications.</p>

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Frame Rate Traceability in High-Speed Cameras for Accurate Time Measurement

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • P. B. Costa,
  • L. C. Dias,
  • I. L. R. Amorim

摘要

Background

The development of high-speed camera technologies allows phenomena that occur at high speeds to be visualized and analyzed with precision. To ensure the quality of the results and provide metrological traceability, it is important that the camera is calibrated in the time parameter. This work proposes a traceable calibration methodology for high-speed cameras.

Methods

The calibration was conducted using an indirect method in which a laser emits controlled pulses in a 2500 Hz square wave. These pulses are monitored by an oscilloscope while simultaneously being captured by a camera. By comparing the pulses recorded by the oscilloscope with those captured by the camera, the calibration results are determined, and an uncertainty analysis is developed.

Results

With the proposed method, the calibration range was from 5400 fps to 400.000 fps, with an uncertainty of 0.02% at maximum frame rate and the main source of uncertainty comes from the calibration of the oscilloscope.

Conclusion

A detailed uncertainty assessment shows traceability and the quality of the results and the presented calibration method allows for the calibration of cameras up to 400,000 fps, making it suitable for a wide range of dynamic testing applications.