Directive 2003/97/EC of the European Parliament and of the Council of 10 November 2003 on the approximation of the laws of the Member States relating to the type-approval of devices for indirect vision and of vehicles equipped with these devices, amending Directive 70/156/EEC and repealing Directive 71/127/EEC (Text with EEA relevance) (repealed) (c. 97)

ANNEX I U.K. DEFINITIONS AND ADMINISTRATIVE PROVISIONS FOR EC TYPE-APPROVAL

1. DEFINITIONS U.K.

1.1.

1.1.2. ‘Camera-monitor device for indirect vision’ means a device as defined in item 1.1, where the field of vision is obtained by means of a camera-monitor combination as defined in points 1.1.2.1 and 1.1.2.2. U.K.

1.1.2.1. ‘Camera’ means a device that renders an image of the outside world by means of a lens onto a light-sensitive electronic detector that then converts this image into a video signal. U.K.

1.1.2.2. ‘Monitor’ means a device that converts a video signal into images that are rendered into the visual spectrum. U.K.

1.1.2.3. ‘Detection’ means the ability to distinguish an object from its background/surroundings at certain distance. U.K.

1.1.2.4. ‘Luminance’ contrast means the brightness ratio between an object and its immediate background/surrounding that allows the object to be distinguished from its background/surroundings. U.K.

1.1.2.5. ‘Resolution’ means the smallest detail that can be discerned with a perceptual system, i.e. perceived as separate from the larger whole. The resolution of the human eye is indicated as ‘visual acuity’. U.K.

1.1.2.6. ‘Critical object’ means a circular object with a diameter D₀ = 0,8 m(1). U.K.

1.1.2.7. ‘Critical perception’ means the level of perception that the human eye is generally capable of achieving under various conditions. For traffic conditions the limiting value for a critical perception is eight arc-minutes of visual angle. U.K.

1.1.2.8. ‘Field of vision’ means the section of the tri-dimensional space in which a critical object can be observed and rendered by the device for indirect vision. This is based on the view on ground level offered by a device and might possibly be limited on the basis of the applicable maximum detection distance of the device. U.K.

1.1.2.9. ‘Detection distance’ means the distance measured at ground level from the viewing reference point to the extreme point at which a critical object just can be perceived (the limiting value for a critical perception just barely achieved). U.K.

1.1.2.10. ‘Critical field of vision’ means the area in which a critical object has to be detected by means of a device for indirect vision and that is defined by an angle and one or more detection distances. U.K.

1.1.2.11. ‘Viewing reference point’ means the point linked to the vehicle to which the prescribed field of vision is related. This point is the projection on the ground of the intersection of a vertical plane passing through the drivers's ocular points with a plane parallel to the median longitudinal plane of the vehicle situated 20 cm outside the vehicle. U.K.

1.1.2.12. ‘Visual spectrum’ means light with a wavelength within the range of the perceptual limits of the human eyes: 380-780 nm. U.K.

(1)

A system for indirect vision is intended to detect relevant road users. The relevancy of a road user is defined by his or her position and (potential) speed. More or less in proportion with the speed of the pedestriancyclistmoped driver, the dimensions of these road users increase as well. For detection purposes a moped driver (D = 0,8) at 40 m distance would be equal to a pedestrian (D = 0,5) at a distance of 25 m. Considering the speeds, the moped driver would be selected as the criterion for the detection size; for that reason an object with a size of 0,8 m shall be used for determining the detection performance.