Volume 29, Issue 4 (October 1984)
Laser and Fiber Optic Photographic Analysis of Single-Edge Paper Striations
The Secret Service has recently developed a technique of utilizing time-lapse photography in conjunction with fiber optic and helium-neon light sources in recording the striae appearing along the edges of single counterfeit notes. It appears that thus far, the fiber optic system of photographically recording striae criteria is superior to the laser systems. Future research is designed to improve the resolution of the laser process together with attempting to store and retrieve automatically the striae identifying criteria from appropriate computer hardware.