When the waves are moving away from the light beam, the largest signal is observed in
retroreflection and the Stokes shift moves to longer wavelengths, as in stimulated Raman scattering.
DELTA supplies retroreflectometers for measuring the
retroreflection of pavement markings and traffic signs, and says well performing markings and signs ensure safe traffic flow in airports, especially when it's dark or in wet conditions.
2 (Brich 2002) depicts the interrelationship of these angles which are needed for obtaining the coefficient of
retroreflection ([R.sub.a]) of sign sheeting.
They are based on the
retroreflection principle in which the system can perfectly identify the reflection of its short eye-safe laser pulses caused by an optic within its scanning sector.
RoadVista, a Gamma Scientific company, is committed to making roads visibly safer with a complete selection of instruments and laboratory testing services for
retroreflection. Retroreflectometers from RoadVista are available for testing traffic signs, pavement markings, sign sheeting and high visibility clothing.
to introduce a new line of WalkSafe umbrellas and rainwear featuring 3M Scotchlite Reflective Material, which provides enhanced visibility through 3M's
Retroreflection technology.
According to Dyson, Europa flowers could be detectable through a phenomenon called
retroreflection, in which light gets reflected back to its source.
Figure 1 details the
retroreflection of light by a single glass bead embedded in paint.
This finding suggests that informing pedestrians of specific issues regarding night visibility (e.g., contrast,
retroreflection, biological motion) and of specific behaviors that can reduce the danger (e.g., avoiding interacting with nighttime traffic, using retroreflective markers, biological motion) may be more productive than simply offering vague admonitions to be careful.