Photoniques Magazine No. 131 | Page 78

OPTICAL PRODUCT SCIENTIFIC HIGH-SPEED CAMERAS sophisticated scientific instruments capable of performing precise measurements on recorded video, see Figure 7 for a high-speed imaging setup with four synchronized cameras performing volumetric PIV analysis( PIV – particle image velocimetry). Modern image sensors, which measure the amount of light hitting each pixel, allow high-speed cameras to function as powerful radiometric and photogrammetric tools. As such, highspeed cameras can be used to transduce( from images) displacement, speed, acceleration, strain, vibration, temperature, and also density & flow gradients with Schlieren optics.

Figure 6: A series of still images extracted from high-speed videos to illustrate the wide range of applications high-speed cameras are involved in. Still-images generated from Phantom high-speed cameras, provided by Kyle D Gilroy & co( Vision Research, AMETEK).

Figure 7: A four-camera setup for performing volumetric PIV studies. TOMO-PTV-4D Study of Hybrid electroactive morphing European Projects, IMFT, LAPLACE & FERMAT federation. Using integrated actuator-sensor design to improve aircraft wings aerodynamic performances HORIZON-2023-2027-PATHFINDER-Open-Project N ° 101129952-BEALIVE- " Bioinspired Electroactive multiscale Aeronautical Live skin ".

UV EXTENSION The transition to BSI has also resulted in improved sensitivity in the UV region, where sensors can achieve over 70 % QE at 300 nm. This is due both to the avoidance of glass microlenses( which absorb UV) and with the addition of a UV-transparent cover glass on the sensor. Figure 5c illustrates the spectral difference between the same sensor, one with cover glass and the other with UV-transparent cover glass. This makes UV-BSI sensors highly effective for applications that require UV sensitivity down to 250 nm, such as UV / Vis spectroscopy, combustion research( OH * imaging), fluorescence imaging, and others.

A MEASUREMENT TOOL High-speed cameras have evolved from simple imaging devices into

APPLICATIONS & TECHNIQUES High-speed cameras are currently being deployed in increasingly advanced imaging applications across academic, industrial, and government research laboratories. Listed below are some common and emerging applications and techniques of high-speed cameras. Figure 6 shows a small subset of examples of how high-speed cameras are being used.

CONCLUSION High-speed cameras have become indispensable tools in research and development across academia, government, and industry, enabling groundbreaking advancements in fields such as materials science, biomechanics, aerospace, and automotive engineering. As high-speed camera technology continues to advance, we will be sure to witness improved frame rates at higher sensor resolutions, together with improved sensor performance to ensure the highest possible data quality.

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