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      Red glass filter
Selective absorption glass filter - Band pass filter
Red 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
HB1 2 0.457 0.403 74.4 0.319 0.325 73.2     1.673       4.09
HB3 2 0.642 0.337 16.6 0.578 0.324 11.1     1.604 102 577 638 3.37
HB5 2 0.401 0.133 0.2 0.204 0.039 0.2 2 2 1.591       3.26
HB6 2 0.569 0.365 1.4 0.403 0.251 1.0 3 3          

Red glass filter technical indexes and class of bubble, stripe, stress
Type Thickness
(mm)
405
(nm)
420
(nm)
436
(nm)
510
(nm))
530
(nm))
570
(nm))
650
(nm))
680
(nm))
700
(nm))
Bubble Stripe Stress
HB1 2   74.3~80.7   57.9~71.3   63.5~74.7   ≥76.4   C 3C 3
HB3 2    
440nm

1.0-9.0
  ≤0.9   45.0~70.0     C 3C 3
HB5 2 ≥35.7   ≤7.1             C 4 3
HB6 2          
590nm

0.8-2.0
640nm

1.1-2.5
  2.1~4.8 C 4 3

Red glass filter's spectra
Red glass

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