Technical Specs

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4.3 Definition of coating defects
Ring of defects Contents of defects Valuation of defect
High-contrast Ÿ Reflective spots and coating
voids
Ÿ Clearly visible by reflection
The number of defects and
quality area
Low-contrast Ÿ Cloudy visible by reflection Ditto
Elongated
Ÿ Same reflection as low contrast
Ÿ Not include high contrast
reflectance
Ditto
4.4 Criteria of coating defects
The following criteria is applied to defects of useful screen area.
Zone
Kinds of defect
Zone A Zone B
Size of
defects(mm)
less than
0.5
0.5-1.0 1.1-1.5 over 1.6
less than
0.5
0.5-1.0 1.1-1.5 over 1.6
Allowable
number of
defects
ignore 5 3 0 ignore 5 3 0High -
contrast
Allowable
min. separa-
tion(mm)
 30  30
Size of
defects(mm)
less than
1.5
1.5-3.0 over 3.1 less than 1.5 1.5-3.0 over 3.1
Allowable
number of
defects
ignore 3 0 ignore 3 0Low -
contrast
Allowable
min. separa-
tion(mm)
 20  20
Width(mm) 3.0 or less
Maximum
length(mm)
less than 10 10 or over
Elong-
ated
Allowable
number of
defect
3 0
ignore