| OHARA | S-BAL14 |
569563 571561 |
||||||
| Refractive Index |  |
1.56883 | Abbe Number |  |
56.3 | Dispersion |  |
0.01010 |
| 1.568832 | 56.36 | 0.010092 | ||||||
 |
1.571237 |  |
56.09 |  |
0.010185 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.54050 |
 |
1.97009 | 1.54565 |
 |
1.52958 | 1.55116 |
 |
1.12864 | 1.55601 |
 |
1.01398 | 1.55761 |
 |
0.85211 | 1.56040 |
 |
0.76819 | 1.56230 |
 |
0.70652 | 1.56404 |
 |
0.65627 | 1.56577 |
 |
0.64385 | 1.56626 |
 |
0.6328 | 1.56671 |
 |
0.58929 | 1.56874 |
 |
0.58756 | 1.56883 |
 |
0.54607 | 1.57124 |
 |
0.48613 | 1.57587 |
 |
0.47999 | 1.57645 |
 |
0.44157 | 1.58067 |
 |
0.435835 | 1.58141 |
 |
0.404656 | 1.58604 |
 |
0.365015 | 1.59400 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
533 |
| Annealing Point (°C) |
AP |
562 |
| Transformation Temperature (°C) |
Tg |
580 |
| Yield Point (°C) |
At |
622 |
| Softening Point (°C) |
SP |
700 |
| Expansion Coefficient   |
-30~+70°C |
80 |
+100~+300°C |
93 |
|
Thermal Conductivity |
k |
0.967 |
Mechanical Properties |
||
Young's Modulus |
E |
811 |
| Rigidity Modulus |
G |
327 |
| Poisson's Ratio |  |
0.240 |
| Knoop Hardness | Hk |
570 [6] |
| Abrasion | Aa |
134 |
Photoelastic Constant |
 |
2.32 |
Partial Dispersions |
|
 |
0.008164 |
 |
0.003476 |
 |
0.003057 |
 |
0.005462 |
 |
0.012574 |
 |
0.005539 |
 |
0.004629 |
 |
0.012595 |
 |
0.008650 |
 |
0.004976 |
 |
0.005209 |
 |
0.017555 |
Deviation of Relative Partial Dispersions |
|
 |
-0.0021 |
 |
0.0002 |
 |
-0.0018 |
 |
-0.0014 |
 |
-0.0051 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.27553696 | |
 |
1.46083393 |  |
 |
1.16754699 | |
 |
7.49692359 |  |
 |
3.10421530 |  |
 |
1.28947092 |  |
1129 ~ 2325 nm |
||
|
1.27553696 | |
|
1.46083393 | |
|
1.16754699 | |
|
7.49692359 | |
|
3.10421530 | |
|
1.28947092 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
3 |
| Acid Resistance (P) | RA(P) |
1 |
| Weathering Resistance (S) | W(S) |
2~3 |
| Acid Resistance (S) | SR |
1.0 |
| Phosphate Resistance | PR |
2.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
1 |
|
| Specific Gravity | d |
2.89 |
|
| Coloring |  |
36 |
|
 |
33 |
||
Relative Partial Dispersions |
|
 |
0.8090 |
 |
0.3444 |
 |
0.3029 |
 |
0.5412 |
 |
1.2459 |
 |
0.5489 |
 |
0.4587 |
 |
1.2480 |
 |
0.8493 |
 |
0.4886 |
 |
0.5114 |
 |
1.7236 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
||
330 |
0.090 |
|
340 |
0.440 |
|
350 |
0.740 |
|
360 |
0.880 |
|
365 |
||
370 |
0.946 |
|
380 |
0.970 |
|
390 |
0.983 |
|
400 |
0.989 |
|
420 |
0.992 |
|
440 |
0.993 |
|
460 |
0.994 |
|
480 |
0.995 |
|
500 |
0.997 |
|
550 |
0.998 |
|
600 |
0.998 |
|
650 |
0.997 |
|
700 |
0.998 |
|
800 |
0.998 |
|
900 |
0.998 |
|
1000 |
0.997 |
|
1200 |
0.997 |
|
1400 |
0.989 |
|
1600 |
0.993 |
|
1800 |
0.983 |
|
2000 |
0.967 |
|
2200 |
0.914 |
|
2400 |
0.860 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 1.2 |
1.5 |
1.5 |
1.6 |
1.8 |
2.1 |
2.4 |
|
| -20 ~ 0 | 1.2 |
1.5 |
1.6 |
1.7 |
1.8 |
2.2 |
2.5 |
|
| 0 ~ 20 | 1.3 |
1.6 |
1.6 |
1.7 |
1.9 |
2.2 |
2.6 |
|
| 20 ~ 40 | 1.3 |
1.7 |
1.7 |
1.8 |
2.0 |
2.3 |
2.7 |
|
| 40 ~ 60 | 1.4 |
1.7 |
1.8 |
1.8 |
2.0 |
2.4 |
2.8 |
|
| 60 ~ 80 | 1.4 |
1.8 |
1.8 |
1.9 |
2.1 |
2.5 |
2.9 |
|