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Proceedings Paper

High-speed videography with solid state devices
Author(s): Rudolf K.F. Germer
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Paper Abstract

The speed to read out the data of a CCD camera limits applications for high speed videography. If the size of a picture is reduced and if parts of the sensitive area of a CCD are used to store the pictures before reading out, an picture sequence can be stored on a CCD and is available as a standard tv-signal. Cavitation bubbles in an ultrasonic wave have been investigated with a 100 kHz frame rate. Faster frame rates are possible, when a computer is used to separate the lines of agglomerated pictures which are produced by an array of cylinder lenses. An illuminated line is shifted electronically to the neighbored dark field and the next lines can be illuminated. Five pictures in 1 microsecond are realized. An ultrasonic plane wave in a transparent material is an array of cylinder lenses which moves with some mm/microsecond. Four to five pictures with good quality can be taken in a period of the sound wave. A sequence of 200 ns in total is demonstrated with a CCl4 shutter. With a laser modulator crystal a shutter time of 8 ns for each picture was realized. Ideas for faster shutters are presented.

Paper Details

Date Published: 17 April 2001
PDF: 8 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424282
Show Author Affiliations
Rudolf K.F. Germer, Fachhochschule f³r Technik und Wirtschaft Berlin and Technische Univ. Berlin (Germany)


Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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