Scratch Hologram — Why a Circular Scratch Produces Depth
Virtual image (above plate)
Conjugate image (below plate)
Zone-plate overlay: ON
arc radius R
viewer distance ρ
eye height h
light azimuth φ
light elevation
● scratch (circle of radius R)
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● light
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● eyes E₁, E₂
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● highlights P₁, P₂
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● sightlines
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● triangulated image point O