step wedge


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step wedge

[′step ‚wej]
(graphic arts)
A series of tones in steps from white to black usually on film or a glass plate for testing purposes.
References in periodicals archive ?
Optical density means were calculated based on the measurements taken in three different areas of each sample and on the fifth step of the step wedge (which corresponded to 5 mm).
The films were exposed to an optical step wedge created by a software program built into the Kodak Dry View 8300 unit (Kodak, Rochester, New York).
If you are using a Stouffer 21 step wedge to verify the correct exposure time you want to see a clear step I and 2 with a visual step 3.