Document ID: chunk:federal_register_of_legislation:F2024C00147:body:0:p6
Version: federal_register_of_legislation:F2024C00147
Segment Type: other
Provision Reference: 
Character Range: 19271–22158

as defined in paragraph 2.1. above, which can be fitted in the passenger compartment of a vehicle.

       2.1.1.2. "Exterior mirror" means a device as defined in paragraph 2.1. above, which can be mounted on the external surface of a vehicle.

       2.1.1.3. "Surveillance mirror" means a mirror other than the ones defined in paragraph 2.1.1. above which can be fitted to the inside or outside of the vehicle in order to provide fields of vision other than those specified in paragraph 15.2.4. of this Regulation.

       2.1.1.4. "Vision support system" means a system to enable the driver to detect and/or see objects in the area adjacent to the vehicle.

       2.1.1.5. "r" means the average of the radii of curvature measured over the reflecting surface, in accordance with the method described in Annex 7.

       2.1.1.6. "The principal radii of curvature at one point on the reflecting surface (ri)" means the values obtained with the apparatus defined in Annex 7, measured on the arc of the reflecting surface passing through the centre of this surface

       parallel to the segment b, as defined in paragraph 6.1.2.1.2.1. of this Regulation and on the arc perpendicular to this segment.

       2.1.1.7. "The radius of curvature at one point on the reflecting surface (rp)" means the arithmetical average of the principal radii of curvature ri and ri i.e.:

       2.1.1.8. "Spherical surface" means a surface, which has a constant and equal radius in all directions

       2.1.1.9. "Aspherical surface" means a surface, which has only in one plane a constant radius.

       2.1.1.10. "Aspherical mirror" means a mirror composed of a spherical and an aspherical part, in which the transition of the reflecting surface from the spherical to the aspherical part has to be marked. The curvature of the main axis of the mirror is defined in the x/y coordinate system defined by the radius of the spherical primary calotte with:

       R: nominal radius in the spherical part

       k: constant for the change of curvature

       a: constant for the spherical size of the spherical primary calotte

       2.1.1.11. "Centre of the reflecting surface" means the centre of the visible area of the reflecting surface.

       2.1.1.12. "The radius of curvature of the constituent parts of the mirror" means the radius "c" of the arc of the circle which most closely approximates to the curved form of the part in question.

       2.1.1.13. "Class of mirror" means all devices having one or more common characteristics or functions. They are classified as follows:

       (a) Class I: "Interior rear-view mirror", giving the field of vision defined in paragraph 15.2.4.1. of this Regulation;

       (b) Classes II and III: "Main exterior rear-view mirror", giving the fields of vision defined in paragraphs 15.2.4.2. and 15.2.4.3. of this Regulation;

       (c) Class IV: