Type

Thickness

(mm)

A[2856k]

D65

Chemical Stability

ND

α×10-⁷

(/^oC)

Tg 

(/^oC)

Ts

(/^oC)

S

x

y

Y

x

y

Y

DA

DW

HB600

2

0.68

0.319

27

0.675

0.325

16.5

1

2

1.523

103

527

605

2.64

HB640

2

0.724

0.276

5

0.723

0.277

2.4

1

2

1.523

103

527

605

2.64

HB650

2

0.728

0.272

3.2

0.728

0.272

1.5

1

2

1.523

103

527

605

2.64

HB685

2

0.734

0.266

0.3

0.734

0.266

0.1

1

2

1.523

103

527

605

2.64

HB720

3

5

4

1.532

111

534

592

2.77

Type

Thickness

(mm)

λtj (nm)

λ0 (nm)

Tλ0 (%)

K

HB600

2

600 ± 10

680

≥88.7

≥1.2

HB640

2

640 ± 10

720

≥88.7

≥1.2

HB650

2

650 ± 10

720

≥87.5

≥1.0

HB685

2

685±10

800

≥83.6

≥0.8

HB720

3

720±10

800

≥80.0

≥0.8

Type

Bubble

Stripe

Stress

HB640

C-B

3C

3

HB650

C-B

3C

3

HB685

C-B

3C

3

HB720

C-B

4

3