FLEX-O-LITE, INC. Providing the Ultimate Safety Solutions for Airfield Markings. Ron Boeger, Business Development. Products Manufactured. Low Index Glass 1.5 IOR for Pavement Markings 1.5 IOR for Industrial Blasting High Index Glass 1.9 IOR for airports Ultra Index Glass
Providing the UltimateSafety Solutions for Airfield Markings
Flex-O-Lite, Inc. is a worldwide leader in
reflective glass bead pavement marking
technology; providing innovative solutions
to visual guidance. Our high index spheres
are scientifically formulated to enhance
runway safety with “Brighter” lines for
the aviation community.
All influence retroreflectivity
Markings play a critical role
in the effort to reduce
Runway incursions. There
has been more attention on
improving these important
visual guidance tools.
All of these most important questions can be
addressed by adopting PERFORMANCE
SPECIFICATIONS and then enforcing compliance of
those SPECIFICATIONS with good INSPECTION
Have have adopted initial minimum levels of
retro-reflectivity to enhance the performance of
their HIGHWAY markings. The recent, FAA funded,
Airfield Marking Handbook, suggests target levels
of reflectivity at installation obtainable from the
different Bead Types on AIRFIELDS.
With a Vehicle Speed of 66-75 mph this
research suggests a minimum level of
620 millicandelas [mcd/m2/lux].
Reference: Paper prepared for the 87th Annual Meeting of the
Transportation Research Board Washington, D.C. January ‘08.
The recommendation for optimal bead efficiency is
obtained using a bead with a index of 1.96. The reason for
this is that a spherical lens is most efficient at reflecting
incident light when the focal point is near the equator of
The bead, which is the precisely case for a nominally
1.9 index bead. Clearly for retroreflection purposes it is
advantageous to use spherical beads with higher IOR.
TRB Paper 08-0775, 87th Annual Meeting of Transportation
Research Board, January 13-17, 2008
with Type III
Sitting in row
23 or lower