|
|
|
|
|
|
|
Borosilicate Crown Glass (BK-7)
|
| |
P(s,t) |
|
0.3098 |
|
| |
P(C,s) |
|
0.5612 |
|
| |
P(d,C) |
|
0.3076 |
|
| |
P(e,d) |
|
0.2386 |
|
| |
P(g,f) |
|
0.5349 |
|
| |
P(i,h) |
|
0.7483 |
|
| |
P(s,t) |
|
0.3076 |
|
| |
P(C',s) |
|
0.6062 |
|
| |
P(d,C') |
|
0.2566 |
|
| |
P(e,d) |
|
0.2370 |
|
| |
P(g,F') |
|
0.4754 |
|
| |
P(i,h) |
|
0.7432 |
|
|
BASE PROPERTIES
|
PARAMETER |
|
VALUE |
|
|
|
|
|
|
| OPTICAL |
|
| |
Refractive Index |
|
nd=1.51680; nе=1.51872 |
|
| |
Abbe Constant |
|
Аd = 64.17; Аe = 63.96 |
|
| |
Principal Dispersion |
|
nF – nC = 0.008054
nF' - nC' = 0.008110 |
|
| |
Bubble class |
|
0 |
|
| |
|
|
|
|
| PHSYCAL |
|
| |
Density |
|
2.51 g/cm3 |
|
| |
Transformation Temperature, Tg |
|
557° C |
|
| |
Temperature of glass in at a viscosity of 107.6 dPa s |
|
719° C |
|
| |
Thermal Conductivity |
|
1.114 W/(m*K) |
|
| |
Coefficient of Expansion |
|
7.1 х 10-6/K -30° ... +70° C
8.3 х 10-6/K 20° ... 300° C |
|
| |
Knoop hardness (0.1/20) |
|
610 |
|
| |
Specific Heat Capacity |
|
0.858 J/(g*K) |
|
| |
Young's Modulus (E) |
|
82 х 103 Н/мм2 |
|
| |
Stress optical coefficient |
|
2.77 x 10-6 mm2/Н |
|
| |
Poisson's Ratio |
|
0.206 |
|
| CHEMICAL |
|
| |
Climatic resistance |
|
2 |
|
| |
Stain resistance |
|
0 |
|
| |
Acid resistance |
|
1 |
|
| |
Phosphate resistance |
|
2.3 |
|
| |
Alkali resistance |
|
2.0 |
|
REFRACTIVE INDEX
| |
Wavelength, nm |
2325.4 |
1970.1 |
1529.6 |
1060.0 |
1014.0 |
852.1 |
706.5 |
|
| |
Refractive Index |
1.489 |
1.495 |
1.501 |
1.507 |
1.507 |
1.510 |
1.513 |
|
|
|
|
|
|
|
|
|
|
| |
Wavelength, nm |
656.3 |
643.8 |
632.8 |
589.3 |
587.6 |
546.1 |
486.1 |
|
| |
Refractive Index |
1.514 |
1.515 |
1.515 |
1.517 |
1.517 |
1.519 |
1.522 |
|
|
|
|
|
|
|
|
|
|
| |
Wavelength, nm |
480.0 |
4358 |
404.7 |
365.0 |
334.1 |
312.6 |
|
|
| |
Refractive Index |
1.523 |
1.527 |
1.530 |
1.536 |
1.543 |
1.549 |
|
|
|
|
|
|
|
