| OHARA | S-BAL11 |
573578 575575 |
||||||
| Refractive Index |  |
1.57250 | Abbe Number |  |
57.8 | Dispersion |  |
0.00991 |
| 1.572501 | 57.74 | 0.009915 | ||||||
 |
1.574864 |  |
57.47 |  |
0.010002 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.54394 |
 |
1.97009 | 1.54922 |
 |
1.52958 | 1.55486 |
 |
1.12864 | 1.55978 |
 |
1.01398 | 1.56139 |
 |
0.85211 | 1.56417 |
 |
0.76819 | 1.56605 |
 |
0.70652 | 1.56778 |
 |
0.65627 | 1.56949 |
 |
0.64385 | 1.56997 |
 |
0.6328 | 1.57042 |
 |
0.58929 | 1.57241 |
 |
0.58756 | 1.57250 |
 |
0.54607 | 1.57486 |
 |
0.48613 | 1.57940 |
 |
0.47999 | 1.57997 |
 |
0.44157 | 1.58410 |
 |
0.435835 | 1.58481 |
 |
0.404656 | 1.58932 |
 |
0.365015 | 1.59701 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
498 |
| Annealing Point (°C) |
AP |
534 |
| Transformation Temperature (°C) |
Tg |
548 |
| Yield Point (°C) |
At |
593 |
| Softening Point (°C) |
SP |
670 |
| Expansion Coefficient   |
-30~+70°C |
66 |
+100~+300°C |
80 |
|
Thermal Conductivity |
k |
0.974 |
Mechanical Properties |
||
Young's Modulus |
E |
819 |
| Rigidity Modulus |
G |
331 |
| Poisson's Ratio |  |
0.237 |
| Knoop Hardness | Hk |
590 [6] |
| Abrasion | Aa |
109 |
Photoelastic Constant |
 |
2.42 |
Partial Dispersions |
|
 |
0.008103 |
 |
0.003436 |
 |
0.003012 |
 |
0.005375 |
 |
0.012313 |
 |
0.005410 |
 |
0.004502 |
 |
0.012197 |
 |
0.008582 |
 |
0.004896 |
 |
0.005106 |
 |
0.017041 |
Deviation of Relative Partial Dispersions |
|
 |
-0.0004 |
 |
0.0006 |
 |
-0.0029 |
 |
-0.0024 |
 |
-0.0113 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
8.21314256 |  |
 |
6.12586478 | |
 |
1.24859637 | |
 |
3.51436131 |  |
 |
1.79762375 |  |
 |
1.33456670 |  |
1129 ~ 2325 nm |
||
|
8.21314256 | |
|
6.12586478 | |
|
1.24859637 | |
|
3.51436131 | |
|
1.79762375 | |
|
1.33456670 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
1 |
| Weathering Resistance (S) | W(S) |
2~3 |
| Acid Resistance (S) | SR |
2.0 |
| Phosphate Resistance | PR |
1.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
1 |
|
| Specific Gravity | d |
3.02 |
|
| Coloring |  |
35 |
|
 |
32 |
||
Relative Partial Dispersions |
|
 |
0.8172 |
 |
0.3465 |
 |
0.3038 |
 |
0.5421 |
 |
1.2419 |
 |
0.5456 |
 |
0.4541 |
 |
1.2302 |
 |
0.8580 |
 |
0.4895 |
 |
0.5105 |
 |
1.7038 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
0.010 |
|
330 |
0.240 |
|
340 |
0.610 |
|
350 |
0.840 |
|
360 |
0.932 |
|
365 |
||
370 |
0.967 |
|
380 |
0.982 |
|
390 |
0.989 |
|
400 |
0.993 |
|
420 |
0.995 |
|
440 |
0.996 |
|
460 |
0.997 |
|
480 |
0.998 |
|
500 |
0.998 |
|
550 |
0.999 |
|
600 |
0.999 |
|
650 |
0.998 |
|
700 |
0.999 |
|
800 |
0.999 |
|
900 |
0.999 |
|
1000 |
0.998 |
|
1200 |
0.998 |
|
1400 |
0.989 |
|
1600 |
0.995 |
|
1800 |
0.988 |
|
2000 |
0.979 |
|
2200 |
0.929 |
|
2400 |
0.890 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 3.0 |
3.4 |
3.5 |
3.6 |
3.7 |
4.0 |
4.3 |
|
| -20 ~ 0 | 3.1 |
3.5 |
3.5 |
3.7 |
3.8 |
4.1 |
4.4 |
|
| 0 ~ 20 | 3.2 |
3.6 |
3.6 |
3.7 |
3.9 |
4.2 |
4.6 |
|
| 20 ~ 40 | 3.2 |
3.6 |
3.7 |
3.8 |
4.0 |
4.3 |
4.7 |
|
| 40 ~ 60 | 3.3 |
3.7 |
3.7 |
3.9 |
4.0 |
4.4 |
4.8 |
|
| 60 ~ 80 | 3.3 |
3.8 |
3.8 |
3.9 |
4.1 |
4.5 |
4.9 |
|