Figure 4
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a) The test object is a stainless steel spring with diameter of 4.3 ± 0.1 mm, a depth of L = 26 ± 0.1 mm and a thread pitch of approx. 2 mm. b) Digital-holographic hypercentric reconstruction of the object with an aperture of d = 1.5 mm, featuring a visible object depth of approx. 4 mm. The insert shows an image of the top of the object.
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