GB/T 5137.2-2002 English PDF (GBT5137.2-2002)

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GB/T 5137.2-2002: Test methods of safety glazing materials used on road vehicles -- Part 2: optical properties tests
GB/T 5137.2-2002
GB
ICS 81.040.30
Q 34
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 5137.2-1996
Test Methods of Safety Glazing Materials Used
on Road Vehicles –
Part 2. Optical Properties Test
(ISO 3538.1997, Road vehicles - Safety glazing materials - Test methods for
optical properties, MOD)
ISSUED ON. DECEMBER 20, 2002
IMPLEMENTED ON. MAY 1, 2003
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China (AQSIQ)
Table of Contents
Foreword ... 3 
1. Scope ... 5 
2. Test Conditions ... 5 
3. Test Application Conditions ... 5 
4. Visible Light Luminous Transmittance Test ... 5 
5. Secondary Image Deviation Test ... 7 
6. Optical Distortion Test ... 11 
7. After-fracture Visibility Test ... 15 
8. Color Identification Test ... 16 
9. Visible Light Luminous Reflectance Test ... 17 
Annex A ... 21 
Foreword
GB/T 5137 “Test Methods of Safety Glazing Materials Used on Road Vehicles” is
divided into four parts.
-- Part 1. Mechanical Properties Test;
-- Part 2. Optical Properties Test;
-- Part 3. Radiation, High Temperature, Humidity, Fire and Simulated Weathering
Resistance Tests;
-- Part 4. Method for the Determination of Solar Transmittance.
This is Part 2 of GB/T 5237.
This Part of GB/T 5137 modifies and adopts ISO 3537.1997 “Road Vehicles - Safety
Glazing Materials - Test Methods for Mechanical Properties” (English Version).
The main differences between this Part and the international standard include.
-- the “Definitions” in the international standard is deleted.
-- The impact position and schematic diagram of the "visibility test after fracture"
are changed in accordance with that stated in GB 9656-2003.
This Part replaces GB/T 5137.2-1996 “Road Vehicles - Safety Glazing Materials - Test
Methods for Mechanical Properties”.
Compared with GB/T 5137.2-1996, the main changes of this Part are as follows.
-- The "4. Luminous Transmittance Test" is changed into "4. Visible Light Luminous
Transmittance Test".
-- 4.1 Test objectives of the visible light luminous transmittance is changed into. "to
determine whether the safety glass has a certain visible light luminous
transmittance".
-- 5.1 Test objectives of the secondary image deviation is changed into. "to
determine the corner deviation between the primary image and the secondary
image".
-- “7. Test objectives of the visibility-after-fracture test” is changed into "7. Test
objectives of the visibility-after-fracture test" [Translator note. In English, both
words are the same].
-- The position and schematic diagram of the impact points are maintained to be
Test Methods of Safety Glazing Materials Used on
Road Vehicles –
Part 2. Optical Properties Test
1. Scope
This Part of GB/T 5137 specifies the test method for the optical properties of
safety glass used for road vehicles.
This Part is applicable for the road vehicle safety glass (hereinafter referred to
as safety glass). The safety glass includes glass products processed from all
kinds of glass OR the combination of the glass and other materials.
2. Test Conditions
Unless otherwise specified, the test shall be carried out under the following
conditions.
a) Environmental Temperature. 20°C±5°C;
b) Air Pressure. 8.60×104Pa ~ 1.06×105Pa;
c) Relative Humidity. 40% ~ 80%.
3. Test Application Conditions
For some kind of safety glass, if the test result can be predicted based on the
known properties, then all experiments specified by this Standard are not
necessary to be carried out [Translator note. All experiments might be
exempted].
4. Visible Light Luminous Transmittance Test
4.1 Test Objectives
This test is to determine whether the safety glass has a certain visible light
luminous transmittance.
4.2 Specimens
The linearity of the receiver and the supporting display instrument shall be
equal to within ±2% of the full-scale, or within ±10% of the reading
measurement range; the smaller value prevails.
4.4 Test Procedures
4.4.1 Before the specimen is placed in front of the light path, the indicated
value of the receiver display instrument shall be adjusted to 100 scale-division.
When there is no light on the receiver, the indicated value is deemed as zero.
4.4.2 The specimen shall be placed between A1 and A2, and have its direction
adjusted so that the incident angle of the light beam is equal to 0°±5°.
4.4.3 The visible light luminous transmittance of the specimen shall be
measured. For each measuring point, the indicated value (n) on the display
instrument shall be read. The visible light luminous transmittance (τr) is equal
to n/100.
4.5 Result Expression
According to the above method, the visible light luminous transmittance (τr)
shall be expressed by the measured value of any point.
4.6 Substitution Method
As long as the provisions in 4.3.3 are met, other methods that can get the
same visible light luminous transmittance result can be adopted.
5. Secondary Image Deviation Test
5.1 Test Objectives
This test is to determine the angular deviation between the primary image and
the secondary image.
5.2 Specimens
Front windscreen glass product.
5.3 Application Scope
Two testing methods may be adopted.
-- target test;
-- collimation telescope test.
White, yellow, red, green, blue and amber color-plates.
8.4 Test Procedures
The color-plates shall be observed through the test area of the specimen.
8.5 Result Expression
Determine whether the color of the plates seen from the windscreen is the
primary color.
9. Visible Light Luminous Reflectance Test
9.1 Test Objectives
It is to determine the visible light luminous reflectance of the safety glass under
the standard illuminant A (see Annex A).
9.2 Instruments
9.2.1 First-class Instrument. lab photometer or spectrophotometer with a high
precision and integral sphere type, able to measure the specimen luminous
reflectance under the measurement standard illuminant A conditions.
The geometrical (optical) conditions of the first-class instrument shall be one of
the following.
a) Diffusion/vertical (d/0). the specimen is illuminated by the integral sphere
diffusion. The included angle between the normal and the axis of the
measuring light beams shall not exceed 10°.
b) Vertical/diffusion (8/d). the specimen is illuminated by a light beam. The
included angle between the light beam axis and the normal of the
specimen shall not exceed 8°. The integral sphere shall be adopted to
collect the reflected light flow.
The diameter of the integral sphere in the first-class instrument shall not be
less than 100mm. The total area of the opening of the integral sphere shall not
be greater than 10% of the sphere surface. The internal surface of the sphere
shall be evenly coated with the high-diffusion reflection materials (visible light
luminous reflectance greater than 95%) that is non-selective to the spectrum.
9.2.2 Second-class instrument. photometer having the precision lower than the
first-class instrument, portable, able to measure the luminous reflectance of
the safety glass of the standard illuminant A conditions, and able to calculate
the measured value through 9.3.5.
Connect the circuit. When the light source and the detector are stabilized,
the extinction trap is placed on the measurement hole of the reflection
specimen. Adjust the ...