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Schlieren System and method for moving objectsA system and method are provided for recording density changes in a flow field surrounding a moving object. A mask having an aperture for regulating the passage of images is placed in front of an image recording medium. An optical system is placed in front of the mask. A transition having a light field-of-view and a dark field-of-view is located beyond the test object. The optical system focuses an image of the transition at the mask such that the aperture causes a band of light to be defined on the image recording medium. The optical system further focuses an image of the object through the aperture of the mask so that the image of the object appears on the image recording medium. Relative motion is minimized between the mask and the transition. Relative motion is also minimized between the image recording medium and the image of the object. In this way, the image of the object and density changes in a flow field surrounding the object are recorded on the image recording medium when the object crosses the transition in front of the optical system.
Document ID
19950020771
Acquisition Source
Legacy CDMS
Document Type
Other - Patent Application
Authors
Weinstein, Leonard M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
February 14, 1995
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.71:LAR-15053-1
Accession Number
95N27191
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LAR-15053-1
Patent Application
US-PATENT-APPL-SN-388652

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