Table 3. Optical properties [
14
]
Materials
Absorptivity (
α
)
Emissivity (
ε
)
α/ε
Al 6061 T6
0.15
0.05
3
Al 7075 T6
0.15
0.05
3
Copper
0.3
0.03
10
CFRP
0.86
0.8
1.075
FR-4
0.6
0.6
1
Black anodizing
0.95
0.89
1.067
MLI
0.1
0.04
2.5
Tape, aluminum, 2 mil, BOL
0.1
0.04
2.5
CFRP, carbon fiber reinforced plastics; MLI, multi layer insulation; BOL, Begin of Life.