| OHARA | S-BAH11 |
667483 670480 |
||||||
| Refractive Index |  |
1.66672 | Abbe Number |  |
48.3 | Dispersion |  |
0.01380 |
| 1.666718 | 48.32 | 0.013797 | ||||||
 |
1.670000 |  |
48.04 |  |
0.013948 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.63328 |
 |
1.97009 | 1.63866 |
 |
1.52958 | 1.64456 |
 |
1.12864 | 1.65008 |
 |
1.01398 | 1.65201 |
 |
0.85211 | 1.65551 |
 |
0.76819 | 1.65798 |
 |
0.70652 | 1.66027 |
 |
0.65627 | 1.66259 |
 |
0.64385 | 1.66324 |
 |
0.6328 | 1.66385 |
 |
0.58929 | 1.66660 |
 |
0.58756 | 1.66672 |
 |
0.54607 | 1.67000 |
 |
0.48613 | 1.67639 |
 |
0.47999 | 1.67719 |
 |
0.44157 | 1.68309 |
 |
0.435835 | 1.68412 |
 |
0.404656 | 1.69067 |
 |
0.365015 | 1.70213 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
593 |
| Annealing Point (°C) |
AP |
617 |
| Transformation Temperature (°C) |
Tg |
629 |
| Yield Point (°C) |
At |
675 |
| Softening Point (°C) |
SP |
738 |
| Expansion Coefficient   |
-30~+70°C |
69 |
+100~+300°C |
82 |
|
Thermal Conductivity |
k |
0.858 |
Mechanical Properties |
||
Young's Modulus |
E |
929 |
| Rigidity Modulus |
G |
365 |
| Poisson's Ratio |  |
0.274 |
| Knoop Hardness | Hk |
560 [6] |
| Abrasion | Aa |
154 |
Photoelastic Constant |
 |
2.06 |
Partial Dispersions |
|
 |
0.010576 |
 |
0.004611 |
 |
0.004129 |
 |
0.007411 |
 |
0.017407 |
 |
0.007739 |
 |
0.006549 |
 |
0.018002 |
 |
0.011228 |
 |
0.006759 |
 |
0.007189 |
 |
0.024938 |
Deviation of Relative Partial Dispersions |
|
 |
-0.0069 |
 |
-0.0002 |
 |
-0.0027 |
 |
-0.0024 |
 |
-0.0156 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.57138860 | |
 |
1.47869313 |  |
 |
1.28092846 | |
 |
9.10807936 |  |
 |
4.02401684 |  |
 |
1.30399367 |  |
1129 ~ 2325 nm |
||
|
1.57138860 | |
|
1.47869313 | |
|
1.28092846 | |
|
9.10807936 | |
|
4.02401684 | |
|
1.30399367 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
4 |
| Weathering Resistance (S) | W(S) |
3 |
| Acid Resistance (S) | SR |
52.2 |
| Phosphate Resistance | PR |
2.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
||
| Specific Gravity | d |
3.59 |
|
| Coloring |  |
38 |
|
 |
34 |
||
Relative Partial Dispersions |
|
 |
0.7665 |
 |
0.3342 |
 |
0.2993 |
 |
0.5371 |
 |
1.2617 |
 |
0.5609 |
 |
0.4747 |
 |
1.3048 |
 |
0.8050 |
 |
0.4846 |
 |
0.5154 |
 |
1.7879 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
||
330 |
||
340 |
0.040 |
|
350 |
0.270 |
|
360 |
0.560 |
|
365 |
||
370 |
0.750 |
|
380 |
0.860 |
|
390 |
0.922 |
|
400 |
0.952 |
|
420 |
0.975 |
|
440 |
0.982 |
|
460 |
0.987 |
|
480 |
0.991 |
|
500 |
0.994 |
|
550 |
0.997 |
|
600 |
0.995 |
|
650 |
0.995 |
|
700 |
0.996 |
|
800 |
0.997 |
|
900 |
0.997 |
|
1000 |
0.997 |
|
1200 |
0.998 |
|
1400 |
0.994 |
|
1600 |
0.995 |
|
1800 |
0.988 |
|
2000 |
0.976 |
|
2200 |
0.936 |
|
2400 |
0.840 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 3.3 |
3.7 |
3.7 |
3.9 |
4.1 |
4.6 |
5.1 |
|
| -20 ~ 0 | 3.3 |
3.8 |
3.8 |
4.0 |
4.2 |
4.7 |
5.2 |
|
| 0 ~ 20 | 3.3 |
3.8 |
3.9 |
4.1 |
4.3 |
4.8 |
5.4 |
|
| 20 ~ 40 | 3.3 |
3.9 |
3.9 |
4.1 |
4.4 |
4.9 |
5.5 |
|
| 40 ~ 60 | 3.4 |
4.0 |
4.0 |
4.2 |
4.5 |
5.0 |
5.6 |
|
| 60 ~ 80 | 3.4 |
4.0 |
4.1 |
4.3 |
4.6 |
5.1 |
5.8 |
|