| OHARA | S-BAH10 |
670473 673470 |
||||||
| Refractive Index |  |
1.67003 | Abbe Number |  |
47.3 | Dispersion |  |
0.01418 |
| 1.670029 | 47.23 | 0.014186 | ||||||
 |
1.673402 |  |
46.94 |  |
0.014345 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.63546 |
 |
1.97009 | 1.64108 |
 |
1.52958 | 1.64722 |
 |
1.12864 | 1.65293 |
 |
1.01398 | 1.65492 |
 |
0.85211 | 1.65852 |
 |
0.76819 | 1.66105 |
 |
0.70652 | 1.66341 |
 |
0.65627 | 1.66579 |
 |
0.64385 | 1.66646 |
 |
0.6328 | 1.66709 |
 |
0.58929 | 1.66990 |
 |
0.58756 | 1.67003 |
 |
0.54607 | 1.67340 |
 |
0.48613 | 1.67997 |
 |
0.47999 | 1.68080 |
 |
0.44157 | 1.68689 |
 |
0.435835 | 1.68796 |
 |
0.404656 | 1.69473 |
 |
0.365015 | 1.70663 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
584 |
| Annealing Point (°C) |
AP |
612 |
| Transformation Temperature (°C) |
Tg |
623 |
| Yield Point (°C) |
At |
669 |
| Softening Point (°C) |
SP |
734 |
| Expansion Coefficient   |
-30~+70°C |
68 |
+100~+300°C |
80 |
|
Thermal Conductivity |
k |
0.902 |
Mechanical Properties |
||
Young's Modulus |
E |
962 |
| Rigidity Modulus |
G |
378 |
| Poisson's Ratio |  |
0.273 |
| Knoop Hardness | Hk |
560 [6] |
| Abrasion | Aa |
127 |
Photoelastic Constant |
 |
2.12 |
Partial Dispersions |
|
 |
0.010866 |
 |
0.004735 |
 |
0.004241 |
 |
0.007614 |
 |
0.017928 |
 |
0.007983 |
 |
0.006774 |
 |
0.018670 |
 |
0.011535 |
 |
0.006945 |
 |
0.007400 |
 |
0.025825 |
Deviation of Relative Partial Dispersions |
|
 |
-0.0023 |
 |
0.0007 |
 |
-0.0028 |
 |
-0.0024 |
 |
-0.0134 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.59034337 | |
 |
1.38464579 |  |
 |
1.21988043 | |
 |
9.32734340 |  |
 |
4.27498654 |  |
 |
1.19251777 |  |
1129 ~ 2325 nm |
||
|
1.59034337 | |
|
1.38464579 | |
|
1.21988043 | |
|
9.32734340 | |
|
4.27498654 | |
|
1.19251777 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
4 |
| Weathering Resistance (S) | W(S) |
2 |
| Acid Resistance (S) | SR |
51.2 |
| Phosphate Resistance | PR |
1.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
1 |
|
| Specific Gravity | d |
3.48 |
|
| Coloring |  |
39 |
|
 |
34 |
||
Relative Partial Dispersions |
|
 |
0.7660 |
 |
0.3338 |
 |
0.2990 |
 |
0.5367 |
 |
1.2638 |
 |
0.5627 |
 |
0.4775 |
 |
1.3161 |
 |
0.8041 |
 |
0.4841 |
 |
0.5159 |
 |
1.8003 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
||
330 |
||
340 |
0.010 |
|
350 |
0.190 |
|
360 |
0.480 |
|
365 |
||
370 |
0.700 |
|
380 |
0.830 |
|
390 |
0.902 |
|
400 |
0.939 |
|
420 |
0.969 |
|
440 |
0.979 |
|
460 |
0.984 |
|
480 |
0.989 |
|
500 |
0.993 |
|
550 |
0.997 |
|
600 |
0.996 |
|
650 |
0.996 |
|
700 |
0.997 |
|
800 |
0.998 |
|
900 |
0.997 |
|
1000 |
0.997 |
|
1200 |
0.998 |
|
1400 |
0.996 |
|
1600 |
0.996 |
|
1800 |
0.991 |
|
2000 |
0.981 |
|
2200 |
0.949 |
|
2400 |
0.850 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 3.4 |
3.9 |
3.9 |
4.1 |
4.3 |
4.8 |
5.3 |
|
| -20 ~ 0 | 3.5 |
3.9 |
4.0 |
4.1 |
4.4 |
4.9 |
5.5 |
|
| 0 ~ 20 | 3.5 |
4.0 |
4.1 |
4.2 |
4.5 |
5.0 |
5.6 |
|
| 20 ~ 40 | 3.6 |
4.1 |
4.1 |
4.3 |
4.6 |
5.2 |
5.7 |
|
| 40 ~ 60 | 3.6 |
4.2 |
4.2 |
4.4 |
4.7 |
5.3 |
5.9 |
|
| 60 ~ 80 | 3.7 |
4.2 |
4.3 |
4.5 |
4.8 |
5.4 |
6.0 |
|