10
4.3.4
Mechanical Criteria
This section includes:
•
•
Circular and Linear Defect Criteria below
•
Acceptance / Rejection Criteria for Glass Defects on page 11
•
Glass Crack Criteria on page 12
4.3.4.1
Types of Glass
The following table describes the types of glass available for Touch Screens, and the requirements for each type.
Verify that the glass panel supplied meets the requirements.
Table 6: Types of Glass
Type of Glass
Requirements
Floated Glass
Soda Lime complies with ASTM C1036/DIN EN 572 art 1, Part 2
and Part 9
Strengthened Glass
•
Tempered Glass complies with EN12150 / DIN1249D /
ASTMC1048 / GB15763.2
•
Chemically Strengthened glass complies with ASTMC1422
•
Tempered & Chemically Strengthened glass complies with
UL 60950-1 test method
•
Safety Laminated Glass complies with BS EN 14449 : 2005
•
Safety laminated glass complies with EN12600 Class 2 Type
B2 test method
Single sided AR 2 Layer (@ wavelength 400mm to
700mm)
•
Glass Transmittance >93%
•
Glass Reflectance <5.5%
Double sided AR 2 Layer (@ wavelength 400mm to
700mm)
•
Glass Transmittance >96%
•
Glass Reflectance <2.0%
Single sided AR 4 Layer (@ wavelength 400mm to
700mm)
•
Glass Transmittance >94%
•
Glass Reflectance <5.0%
Double sided AR 4 Layer (@ wavelength 400mm to
700mm)
•
Glass Transmittance >98%
•
Glass Reflectance <1.0%
4.3.4.2
Circular and Linear Defect Criteria
The following table defines circular and linear defect limitations for Touch Screen
glass panel
acceptance.
Table 7: Touch Screen Glass Panel Circular and Linear Defect Limitations
Type of Glass Defect
Description
Circular Defect
Linear Defect
