619 autoclave sterilization, β and γ ray sterilization POLYCARBONATE Lens
92 g
GAMMA RAY radiation with 25 kGy
REFERENCE PARAMETERS
LIFE CYCLE
Lens
VLT = 87.4%
number of cycles 0 5 10 15 20 ...
Elastic Band
Δl = 60.0%
VLT= visible light trasmittance Δl = elongation%
suggested action
suggested action Replace the goggles
Change the lens
Mask elements
Number of cycles
0÷5
5÷10
10÷15
Frame
No alteration
No alteration
No alteration
Lens
VLT = 74.9% The lens becomes light yellow
VLT = 68.8% The lens becomes yellow
VLT = 62.8% The lens becomes yellow
Elastic band
Δl = 40.0% No alteration
Δl = 18.3% No alteration
Δl = 13.3% No alteration
Buckle
BETA RAY radiation with 25 kGy
LIFE CYCLE
number of cycles 0 5 10 15 20 ...
suggested action
suggested action Replace the goggles
Change the lens
Mask elements
Number of cycles
0÷5
5÷10
10÷15
Frame
No alteration
No alteration
No alteration
Lens
VLT = 82.7% The lens becomes light yellow
VLT = 68.8% The lens becomes yellow
VLT = 65.9% The lens becomes yellow
Elastic band
Δl = 46.6% No alteration
Δl = 21.6% No alteration
Δl = 16.6% No alteration
Buckle
Sterilization with STEAM 121°C for 30min in 1 ATM
LIFE CYCLE
number of cycles 0 5 10 15 20 25 30 35 40 45
suggested action
suggested action Replace the goggles
Change the lens
Mask elements
Number of cycles
0÷5
5÷10
10÷15
Frame
No alteration
No alteration
No alterationd VLT = 84.3% Δl = 42.7% No alteration
Lens
VLT = 86.2% Δl = 54.8% No alteration
VLT = 85.8% Δl = 50.2% No alteration
Elastic band
Buckle
15
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