Image intensified cameras for high-speed imaging applications that require more than just the high frame-rate

Thomas F. Lynch; Anjie Zeng

doi:10.1117/12.562303

17 March 2005 Image intensified cameras for high-speed imaging applications that require more than just the high frame-rate

Thomas F. Lynch, Anjie Zeng

Author Affiliations +

Proceedings Volume 5580, 26th International Congress on High-Speed Photography and Photonics; (2005) https://doi.org/10.1117/12.562303
Event: 26th International Congress on High-Speed Photography and Photonics, 2004, Alexandria, Virginia, United States

Abstract

The nature of high-speed or high frame rate imaging results in a short exposure time requiring the object be illuminated with a high brightness light source. In some cases, as in biological studies and other heat sensitive materials this is not an option. For these low light level applications we have developed an intensified high-speed camera. This camera extends the sensitivity to 10^-6 fc (10^-5 lux) at a minimum frame rate of 1000 frames per second (fps). Frame rates well above 1000 fps have been achieved. Part of the success of this camera lies in the use of a high quantum efficiency (QE) image intensifier, having a GaAs photocathode with a QE exceeding 50%, fiber optically coupled to a high-speed camera. The intensifier, which can be gated, also serves as an external shutter to the image sensor. The gate allows exposures as short as 50 ns not achievable with the unintensified camera. The gate can be delayed and synced with the image to capture information at the right moment. Gating also allows the camera to be used in brighter situations extending the dynamic range of the camera to over 10 orders of magnitude.

Citation Download Citation

Thomas F. Lynch and Anjie Zeng "Image intensified cameras for high-speed imaging applications that require more than just the high frame-rate", Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); https://doi.org/10.1117/12.562303

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