Some new security devices for paper currency based on the concept of
“micro mirror technology” were introduced at the Banknote Conference
2016 last May in Washington. They were developed by the German firm
Giesecke & Devrient and its Louisenthal subsidiary. The micro
mirror technology that two of the devices make use of involves the
incorporation of microscopic mirrors into a note.
The first device is named Rolling Star LEAD, a security foil with
microscopic mirrors technology. The foil is described by the
manufacturer as making use of optical variable device effects
including color shifts and three-dimensional images. Giesecke &
Devrient calls the security foil different not only for its use of
multiple techniques and innovations but also in the “intuitive” way it
enables recognition. The firm says creating new 3D effects and adding
vividness to enliven portraits are now possible. According to the
firm, RollingStar LEAD’s dynamic effects can be recognized even in
poor lighting conditions to allow for quicker authentication.
Connect with Coin World:
Another device, the Galaxy Security Thread, also uses the
microscopic mirrors along with color-shifting technology. Unlike a
static security thread, the mirrors allow the appearance of movement
and striking color shifting within the thread, and the effect is
termed eye-catching by the manufacturer. The technology also allows
for three-dimensional effects within the thread.
Also featured was RollingStar Registered, a technique that enables
the security thread to be embedded into the paper during production of
the paper. The integration of the window thread into the design of the
paper enables identical-looking windows and 3D elements to be
incorporated into every note.