Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p94
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 253412–256990

1. 1.2. Limited photometry                                                                      X   X   X
(para. 2.1.2.)
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. ~. Atmospheric agents           X                               X       X
(para. 2.2. 1.)
1. ~. 1. Transmission measurement  X                               X       X
1.4. Chemical agents               X                               X       X
(para. 2.2.2.)
1.4. 1. Diffusion measurement      X                               X       X
1.5. Detergents (para. 2.3. 1.)                                               X  X  X
1.6. Hydrocarbons (para. 2.3.2.)                                              X  X  X
1.6. 1. Transmission measurement                                              X  X  X
1.7. Deterioration (2.4. L)                                                            X  X  X
1.7. 1. Transmission measurement                                                       X  X  X
1.7.2. Diffusion measurement                                                           X  X  X
1.8. Adherence (para. 2.5.)                                                                                  X

       B.  Tests on complete lamps (supplied pursuant to paragraph 2.2.3. of this Regulation)

                                      Complete headlamp
Test                                  Sample No.
                                                         2
2. 1. Deterioration (para. 2.6.1. L)  X                  X
2.2. Photometry (para. 2.6.1.1)       X
2.3. Adherence (para. 2.6.1)

Annex 6 - Appendix 2

METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT

       1. EQUIPMENT (see Figure)

       The beam of a collimator K with a half divergence beta/2 = 17.4 x 10 -4 rd is limited by a diaphragm DT with an opening of 6mm against which the sample stand is placed.

       A convergent achromatic lens L 2, 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 beta/2 = 14 degrees.

       An annular diaphragm DD with angles alpha/2 =1 degree and Alpha max /2= 12 degrees is placed in an image 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.

       2. MEASUREMENTS

       The following readings shall be taken:

Reading  With Sample    With central part of DD  Quantity represented
T1       No             No                       Incident flux in initial reading
T2       Yes            No                       Flux transmitted by the new material in a field of 24 degrees C
         (before test)
T3       Yes            No                       Flux transmitted by the tested material in a field of 24 degrees C
         (after test)
T4       Yes            Yes                      Flux diffused by