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Selective absorption glass filter - Band pass filter
Infrared glass filter Characteristic
Type Thickness
(mm)
A[2856k] D65 Chemical Stability ND α×10-7
(/℃)
Tg
(℃)
Ts
(℃)
S
x y Y x y Y DA DW
HWB1 1 0.612 0.260 0.2 0.325 0.111 0.1 1 3 1.525       2.53
HWB3 1             1 3 1.525       2.53
HWB4 1             1 3 1.525       2.53

Infrared glass filter technical indexes and class of bubble, stripe, stress
Type Thickness
(mm)
400
(nm)
700
(nm)
800
(nm)
860
(nm))
900
(nm))
1100
(nm))
Bubble Stripe Stress
HWB1 1 ≤14.0 ≤6.0 ≤30.0     ≥85.5 C-B 4 3
HWB3 1 ≤0.5 ≤1.0   ≤37.0   ≥75.0 C-B 4 3
HWB4 1 ≤0.1   ≤5.0   ≤38.0 ≥75.0 C-B 4 3

Infrared glass filter's spectra
Infrared glass

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