GB11564-1998标准（英文版）.pdf

National Standard of People’s Republic of China
Retro Reflector for Motor Vehicles
GB 11564--****
Substitution of GB/T 11564—89

1 Scope
This standard specifies the technical requirements, testing methods and inspection rules for retro
reflector of motor vehicles.
This standard applies to various type retro reflectors used on motorcycles, motor vehicles and
trailers.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this standard. At the time of publication, the editions indicated were valid. All
standards are subject to revision, and parties to agreements based on this standard are encouraged
to investigate the possibility of applying the most recent editions of the standards indicated
below.
GB/T3978—1994 Standard Illuminants and Illuminating-viewing Conditions
3 Definitions
For the purpose of this standard, following standards are applied.
Retro Reflection
Means the reflection in which light is reflected in directions close to the direction from which it
came. This property is maintained over wide variations of the illumination angle;
Retro Reflecting Optical Unit
Means bination of ponents producing retro reflection;
Retro Reflector1) ( hereinafter referred to as “reflector”)
Means an prising one or more retro reflect