Document ID: chunk:federal_register_of_legislation:F2024C00148:reg:1:p14
Version: federal_register_of_legislation:F2024C00148
Segment Type: reg
Provision Reference: reg 1 (pt 14/34)
Character Range: 170308–173588

(passenger's side): 0.16;

              (m) for Class III (passenger's side): 0.20;

              (n) for Class IV (passenger's side): 0.046.

       16.1.3.2. Resolution (MTF)

              The resolution (MTF) defines the minimum distinguishable details observable in an image as is represented by the MTF10. For reasons of simplicity the requirement is defined assuming an aspect ratio of 1:1.

              Resolution MTF10, at the centre of the monitor defined size shall fulfil the following requirements:

                 in horizontal direction,

                 in vertical direction.

              Resolution MTF10, at the corner measurement points as illustrated in the figure below shall fulfil the following requirements:

                 in horizontal direction,

                 in vertical direction,

              16.1.4 Magnification aspect ratio

              In the required field of view, the difference between the average magnification factor for horizontal and vertical direction of a CMS shall satisfy the following equations depending on the individual mirror classes.

              For devices Class I the acceptable range shall be:

              For devices Class II the acceptable range shall be:

              For devices Class III the acceptable range shall be:

              For devices Class IV no restriction in magnification ratio is required.

              16.1.5. Monitor inside the vehicle

              16.1.5.1. The centre of the monitor(s) shall not be below a plane passing through the driver's ocular points, as defined in paragraph 12.1., and declined 30° below.

              16.1.5.2. The arrangement of the monitor(s) inside the vehicle shall be convenient to the driver.

              Thus, the image of the right-side field of view shall be presented to the right of the longitudinal vertical plane through the ocular reference point, defined in paragraph 12.6. The image of the left side field of view shall be presented to the left of the longitudinal vertical plane through the ocular reference point.

              If the CMS shows more than one field of vision on the same display, non-continuous images shall be clearly separated from each other. If the field of vision from different classes of devices for indirect vision are shown on the monitor(s) without hiding any part of the required field of vision, a combined continuous image is allowed. In this case, a clear separation of the different fields of vision is not necessary and any changes in magnification may be indicated to the driver using indication lines. Indication lines shall not hide information.

              16.1.5.3. The monitor defined size shall be visible without any obstruction from the ocular reference point. A virtual testing is acceptable.

              16.1.6. Obstruction of the driver's direct view caused by the installation of a device for indirect vision shall be restricted to a minimum.

              16.1.7. Decreasing accommodation

              The installation of the monitor inside the vehicle should follow the needs of the intended user group. The operator's manual shall provide information on the decreasing capacity of the human being to accommodate and shall recommend suitable assistance for