Measurement for retroreflectors

Reflection describes the characteristic of a surface to return incident light in the same direction. A distinction is drawn between diffuse reflection (i.e. scatter) and specular reflection (angle of reflection is equal to angle of incidence).

Retroreflection involves catadioptric (specular and refracting) elements reflecting the light and returning it in the direction of the light source.

Retroreflectors are used to increase night vision and thereby enhance safety. Some of the applications include their use on vehicles, and on delineator posts for road marking, traffic signs and clothing.

Instrument Systems supplies a range of measurement systems for carrying out photometric testing on retroreflectors in the laboratory and in production settings. These are in conformity with the following applicable standards:

  • CIE Publication No. 54.2-2001: Retroreflection definition and measurement
  • DIN 67520: Retroreflecting materials for traffic safety
  • DIN EN 1463, part 1: Retroreflecting road studs for road construction
  • DIN EN 12899-1: Retroreflecting traffic signs
  • DIN EN 12899-3: Delineator posts and retroreflectors
  • DIN EN 12767: Retroreflectors in traffic delineator posts
  • DIN EN 471: High visibility warning clothing with retroreflecting foils
  • ECE standards R 3, R 27, R 69, R 70, R 104: Automotive retroreflectors in conformity with UNECE
  • SAE standards J 594, J 774, J 943, J 2041, as well as FVMSS108 and CVMSS108: North American standards on automotive retroreflectors