Document ID: chunk:federal_register_of_legislation:F2024C00148:front:0:p20
Version: federal_register_of_legislation:F2024C00148
Segment Type: other
Provision Reference: 
Character Range: 57461–60545

mirror shall lie within a rectangle measuring 120 mm x 200 mm.

              6.1.2.2. Reflecting surface and coefficients of reflection

              6.1.2.2.1. The reflecting surface of a mirror shall be either flat or convex. Exterior mirrors may be equipped with an additional aspherical part provided that the main mirror fulfils the requirements of the indirect field of vision.

              6.1.2.2.2. Differences between the radii of curvature of mirrors

              6.1.2.2.2.1. The difference between ri or r'i, and rp at each reference point shall not exceed 0.15 r.

              6.1.2.2.2.2. The difference between any of the radii of curvature (rp1, rp2, and rp3) and r shall not exceed 0.15 r.

              6.1.2.2.2.3. When r is not less than 3,000 mm, the value of 0.15 r quoted in paragraphs 6.1.2.2.2.1. and 6.1.2.2.2.2. above is replaced by 0.25 r.

              6.1.2.2.3. Requirements for aspherical parts of mirrors

              6.1.2.2.3.1. Aspherical mirrors shall be of sufficient size and shape to provide useful information to the driver. This normally means a minimum width of 30 mm at some point.

              6.1.2.2.3.2. The radius of curvature ri of the aspherical part shall not be less than 150 mm.

              6.1.2.2.4. Value of "r" for spherical mirrors shall not be less than:

              6.1.2.2.4.1. 1,200 mm for rear-view mirrors (Class I);

              6.1.2.2.4.2. 1,200 mm for Class II and III main rear-view mirrors;

              6.1.2.2.4.3. 300 mm for "wide-angle" mirrors (Class IV) and "close-proximity" mirrors (Class V);

              6.1.2.2.4.4. 200 mm for front mirrors (Class VI).

              6.1.2.2.4.5. 1,000 mm or more than 1,500 mm for Class VII main rear-view mirrors.

              6.1.2.2.5. The value of the normal coefficient of reflection, as determined according to the method described in Annex 6, shall be not less than 40 per cent.

              In the case of reflecting surfaces with a changeable degree of reflection, the "day" position shall allow the colours of the signals used for road traffic to be recognized. The value of the normal coefficient of reflection in the "night" position shall be not less than 4 per cent.

              6.1.2.2.6. The reflecting surface shall retain the characteristics laid down in paragraph 6.1.2.2.5. above in spite of prolonged exposure to adverse weather conditions in normal use.

              6.2. Devices for indirect vision other than mirrors

              6.2.1. General requirements

              6.2.1.1. If adjustment by the user is needed, the device for indirect vision shall be  adjustable without the use of tools.

              6.2.1.2. If a device for indirect vision can only render the total prescribed field of vision by scanning the field of vision, the total process of scanning, rendering and reset to its initial position together shall not take more than 200 milliseconds at room temperature of 22 °C ± 5 °C.

              6.2.1.3. The effectiveness of the CMS of Classes I to IV shall not be adversely affected