Rainbow Hologram Characteristics

Rainbow holograms, developed by Stephen Benton, represent a brilliant optical compromise that allows high-fidelity holographic projection viewable under standard white light. Also known as Benton holograms, they achieve this by eliminating vertical parallax while fully preserving horizontal depth.

The analog recording process utilizes a horizontal slit placed over the primary transmission hologram. This structural restriction limits the vertical scattering paths of the diffracted light. When broad-spectrum white light shines through, the holographic image is reconstructed across a spectrum of colors depending on the viewer’s vertical vantage point.

This technology forms the basis of the reflective security foils found on modern credit cards, passports, and secure packaging. It delivers a fast, low-cost anti-counterfeiting mechanism that shimmers dynamically with distinct volumetric shifts when tilted.