Refractive Indices

706.5

1.83100

656.3

1.83649

643.8

1.83807

632.8

1.83956

589.3

1.84636

587.6

1.84666

546.1

1.85505

486.1

1.87209

480.0

1.87430

435.8

1.89413

404.7

1.91423

365.0

Constants of Dispersion Formula

3.2606321

-1.778039810

4.090293810

5.607693410

-5.643403910

5.476339110

Relative Partial Dispersions  

0.2857

0.2372

0.2356

0.2314

0.6191

0.5471

0.0022

0.0136

Chemical Properties

Grade  

2

1

ThermalProperties

615

650

619

96

105

 Mechanical Properties

550

0.62

10130

4070

0.244

Stress-Optical 
Coefficient

2.73

Coloration Code

42/37

Other Properties

3.50

Internal Transmittance

2400

0.954

0.910

2200

0.977

0.954

2000

0.988

0.976

1800

0.993

0.986

1600

0.998

0.997

1400

0.998

0.997

1200

0.998

0.997

1060

0.998

0.997

1000

0.998

0.997

950

0.998

0.996

900

0.998

0.996

850

0.997

0.995

800

0.996

0.992

700

0.995

0.990

650

0.994

0.988

600

0.995

0.990

550

0.993

0.987

500

0.985

0.970

480

0.980

0.960

460

0.97

0.94

440

0.96

0.91

420

0.92

0.85

400

0.84

0.70

390

0.75

0.56

380

0.57

0.33

370

0.25

0.06

360

0.02

350

340

330

320

310

300

290

280