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References

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  1. O. Kafri, Opt. Lett. 5, 555 (1980).
    [CrossRef] [PubMed]
  2. E. Marglit, O. Kafri, unpublished.
  3. O. Kafri, A. Livnat, Opt. Lett. 4, 314 (1979).
    [CrossRef] [PubMed]

1980 (1)

1979 (1)

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Figures (4)

Fig. 1
Fig. 1

Schematic description of reflective surface moiré deflectometry: G1 and G2, Ronchi rulings; and S, opaque screen.

Fig. 2
Fig. 2

If the beam is incident upon a reflective surface at an angle α, rays incident upon a bump with a slope angle β will deviate from their route by 2β.

Fig. 3
Fig. 3

(a) Moiré deflectogram of a wave induced in an oil bath. Maximum height of the wave is ~7 μm. (b) Deflectogram of oil surface at rest.

Fig. 4
Fig. 4

Surface hill of 2-μm height produced by touching oil with a needle. Note straight lines at ends of the deflectogram.

Equations (3)

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ϕ i , j = h i j 2 sin ( θ / 2 ) Δ .
x = x ,             y = y · sin α .
β i , j = h i , j sin ( θ / 2 ) Δ .

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