VERIFICATION OF THE CONFORMITY OF PRODUCTION. 3.1. With regard to the materials used for the manufacture of lenses, the lamps of a series shall be recognized as complying with this Regulation if: 3.1.1. After the test for resistance to chemical agents and the test for resistance to detergents and hydrocarbons, the outer face of the samples exhibits no cracks, chipping or deformation visible to the naked eye (see paragraphs 2.2.2., 2.3.1. and 2.3.2.); 3.1.2. After the test described in paragraph 2.6.1.1., the photometric values at the points of measurement considered in paragraph 2.6.1.2. are within the limits prescribed for conformity of production by this Regulation. 3.2. If the test results fail to satisfy the requirements, the tests shall be repeated on another sample of headlamps selected at random. Annex 5 - Appendix 1 CHRONOLOGICAL ORDER OF APPROVAL TESTS A. Tests on plastic materials (lenses or samples of material supplied pursuant to paragraph 2.2.4 of this Regulation) Samples Lenses or samples of material Lenses 1.1. Limited photometry (A.5, para. 2.1.2.) X X X 1.1. Temperature change (A.5, para. 2.1.1.) X X X 1.2. Limited photometry (A.5, para. 2.1.2.) X X X 1.2.1. Transmission measurement X X X X X X X X X 1.2.2. Diffusion measurement X X X X X X 1.3. Atmospheric agents (A.5, para. 2.2.1.) X X X 1.3.1. Transmission measurement X X X 1.4. Chemical agents (A.5, para.2.2.2.) X X X 1. Diffusion measurement X X X 1.5. Detergents (A.5, para. 2.3.1.) X X X 1.6. Hydrocarbons (A.5, para. 2.3.2.) X X X 1. Transmission measurement X X X 1.7. Deterioration (A.5, para. 2.4.1.) X X X 1.7.1. Transmission measurement X X X 2. Diffusion measurement X X X 1.8. Adherence (A.5, para. 2.5.) X B. Tests on complete lamps (supplied pursuant to paragraph 2.2.3. of this Regulation) Tests Complete headlamp Sample No. 1 2 2.1. Deterioration (para. 2.6.1.1.) 2.2. Photometry (para. 2.6.1.2.) 2.3. Adherence (para. 2.6.2.) X X X METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT 1. EQUIPMENT (see figure) The beam of a collimator K with a half divergence β/2 = 17.4 x 10-4 rd is limited by a diaphragm DT with an opening of 6 mm against which the sample stand is placed. A convergent achromatic lens L2, corrected for spherical aberrations, links the diaphragm DT with the receiver R; the diameter of the lens L2 shall be such that it does not diaphragm the light diffused by the sample in a cone with a half top angle of β/2 = 14°. An annular diaphragm DD with angles α0/2 = 1° et αmax/2 = 12° is placed in an image focal plane of the lens L2. The non-transparent central part of the diaphragm is necessary in order to eliminate the light arriving directly from the light source. It shall be possible to remove the central part of the diaphragm from the light beam in such a manner that it returns exactly to its original position. The distance L2 DT and the focal length F2 1/ of the lens L2 shall be so chosen that the image of DT completely covers the receiver R. When the initial incident flux is referred to 1,000 units, the absolute precision of each reading shall be better than 1 unit.
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Sources: Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles
VERIFICATION OF THE CONFORMITY OF PRODUCTION. 3.1. With regard to the materials used for the manufacture of lenses, the lamps of a series shall be recognized as complying with this Regulation if:
3.1.1. After the test for resistance to chemical agents and the test for resistance to detergents and hydrocarbons, the outer face of the samples exhibits no cracks, chipping or deformation visible to the naked eye (see paragraphs paras. 2.2.2., 2.3.1. and 2.3.2.);
3.1.2. After the test described in paragraph 2.6.1.1., the photometric values at the points of measurement considered in paragraph 2.6.1.2. are within the limits prescribed for conformity of production by this Regulation.
3.2. If the test results fail to satisfy the requirements, the tests shall be repeated on another sample of headlamps selected at random. Annex 5 - Appendix 1 CHRONOLOGICAL ORDER OF APPROVAL TESTS
A. Tests on plastic materials (lenses or samples of material supplied pursuant to paragraph 2.2.4 2.2.4. of this Regulation) Samples Lenses or samples of material Lenses).
1.11. Limited photometry (A.5, para. 2.1.2.) X X X
1.11.1.1. Temperature change (A.5, para. 2.1.1.) X X X
1.21.1.2. Limited photometry (A.5, para. 2.1.2.) X X X 1.2.1. Transmission measurement X X X X X X X X X 1.2.2. Diffusion measurement X X X X X X 1.3. Atmospheric agents (A.5, para. 2.2.1.) X X X 1.3.1. Transmission measurement X X X 1.4. Chemical agents (A.5, para.2.2.2para. 2.2.2.) X X X
11.4.1. Diffusion measurement X X X 1.5. Detergents (A.5, para. 2.3.1.) X X X 1.6. Hydrocarbons (A.5, para. 2.3.2.) X X X
11.6.1. Transmission measurement X X X 1.7. Deterioration (A.5, para. 2.4.1.) X X X 1.7.1. Transmission measurement X X X1.7.
2. Diffusion measurement X X X 1.8. Adherence (A.5, para. 2.5.) X
B. Tests on complete lamps (supplied pursuant to paragraph 2.2.3. of this Regulation) Tests Complete headlamp Sample No. 1 2
2.1. Deterioration (para. 2.6.1.1.) 2.2. Photometry (para. 2.6.1.2.) 2.3. Adherence (para. 2.6.2.) X X X METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT
1. EQUIPMENT (see figure) The beam of a collimator K with a half divergence β/2 = 17.4 x 10-4 rd is limited by a diaphragm DT with an opening of 6 mm against which the sample stand is placed. A convergent achromatic lens L2, corrected for spherical aberrations, links the diaphragm DT with the receiver R; the diameter of the lens L2 shall be such that it does not diaphragm the light diffused by the sample in a cone with a half top angle of β/2 = 14°. An annular diaphragm DD with angles α0/2 = 1° et αmax/2 = 12° is placed in an image focal plane of the lens L2. The non-transparent central part of the diaphragm is necessary in order to eliminate the light arriving directly from the light source. It shall be possible to remove the central part of the diaphragm from the light beam in such a manner that it returns exactly to its original position. The distance L2 DT and the focal length F2 1/ of the lens L2 shall be so chosen that the image of DT completely covers the receiver R. When the initial incident flux is referred to 1,000 units, the absolute precision of each reading shall be better than 1 unit.x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
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Sources: Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles