Physics – Optics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1801..780m&link_type=abstract
Proc. SPIE Vol. 1801, p. 780-795, 20th International Congress on High Speed Photography and Photonics, John M. Dewey; Roberto G.
Physics
Optics
1
Scientific paper
A Cranz-Schardin camera with independently adjustable inter-frame times from 100 microseconds to less than 1 microsecond is described. The flash system is the classical LC spark and delay approach used by Cranz and Schardin. The capacitors are 0.06 microfarad units charged to only 7000 volts, allowing the use of commercially available flash lamp trigger transformers as delay inductors for the longer times. Shorter delays are achieved with homemade vacuum potted coils. The field element may be a telescope achromat, a Fresnel lens, or alternately a concave mirror. The camera lenses are standard achromats or simple meniscus lenses sold by optics supply houses. Mounted on the lensboard of a Calumet 4 inch by 5 inch view camera, the optics train is simply installed in the camera. The front end of the camera may be raised to bring the lens apertures into position to act as schlieren stops. Photos of resolution charts are shown to demonstrate the camera.
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