FIELD: hologram interferometering of a flat object.
SUBSTANCE: the mode of hologram interferometering of a flat object is in making of a double exposure hologram of the surface of the object in counter rays. Then two images of the surface of the object reconditioned by the hologram are directed in an optical system in which one after another two direct Fournier-Frenel transform are carried out, interferograms of the images of the surface of the object are fixed. The object and the interferogram are located at such distances from the lenses that the in-focus image of the surface of the object in the surface of the interferogram is made and at the expense of variations of these distances and the focal distances of the lenses, measured sizes are divided and wishful sensitivities of measurements of travel and inclination constant along the whole surface are chosen.
EFFECT: ensuring constant surface and variable sensitivity, increased range of measuring of travel and inclination.
1 dwg
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