Polishing hologram

A polishing hologram is a visible pattern of damage to a polished surface.[1] It is caused by small scratches to the surface, which result in light being refracted, creating a pattern which appears to float deep beneath the surface.[2]

## Notes

1. ↑ Autoblitz Mayer "Holograms - Damage to Paintwork
2. ↑ "Drawing Holograms by Hand", W. Beaty,, Proc. SPIE-IS&T Electronic Imaging, Tung H. Jeong, ed., SPIE Vol. 5005, 156-167, 2003.

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