| OHARA | S-BAH32 |
670393 674390 |
||||||
| Refractive Index |  |
1.66998 | Abbe Number |  |
39.3 | Dispersion |  |
0.01706 |
| 1.669979 | 39.27 | 0.017061 | ||||||
 |
1.674022 |  |
38.99 |  |
0.017287 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.63134 |
 |
1.97009 | 1.63728 |
 |
1.52958 | 1.64386 |
 |
1.12864 | 1.65013 |
 |
1.01398 | 1.65237 |
 |
0.85211 | 1.65648 |
 |
0.76819 | 1.65941 |
 |
0.70652 | 1.66216 |
 |
0.65627 | 1.66495 |
 |
0.64385 | 1.66574 |
 |
0.6328 | 1.66648 |
 |
0.58929 | 1.66983 |
 |
0.58756 | 1.66998 |
 |
0.54607 | 1.67402 |
 |
0.48613 | 1.68201 |
 |
0.47999 | 1.68303 |
 |
0.44157 | 1.69059 |
 |
0.435835 | 1.69193 |
 |
0.404656 | 1.70056 |
 |
0.365015 | 1.71630 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
546 |
| Annealing Point (°C) |
AP |
563 |
| Transformation Temperature (°C) |
Tg |
608 |
| Yield Point (°C) |
At |
657 |
| Softening Point (°C) |
SP |
726 |
| Expansion Coefficient   |
-30~+70°C |
69 |
+100~+300°C |
78 |
|
Thermal Conductivity |
k |
0.921 |
Mechanical Properties |
||
Young's Modulus |
E |
904 |
| Rigidity Modulus |
G |
359 |
| Poisson's Ratio |  |
0.260 |
| Knoop Hardness | Hk |
580 [6] |
| Abrasion | Aa |
138 |
Photoelastic Constant |
 |
2.74 |
Partial Dispersions |
|
 |
0.012577 |
 |
0.005542 |
 |
0.005030 |
 |
0.009073 |
 |
0.021950 |
 |
0.009919 |
 |
0.008632 |
 |
0.024370 |
 |
0.013368 |
 |
0.008282 |
 |
0.009005 |
 |
0.033272 |
Deviation of Relative Partial Dispersions |
|
 |
0.0063 |
 |
0.0013 |
 |
0.0034 |
 |
0.0035 |
 |
0.0322 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.58023630 | |
 |
1.37504632 |  |
 |
1.60603298 | |
 |
1.03578062 |  |
 |
5.48393088 | |
 |
1.47982885 |  |
1129 ~ 2325 nm |
||
|
1.58023630 | |
|
1.37504632 | |
|
1.60603298 | |
|
1.03578062 | |
|
5.48393088 | |
|
1.47982885 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
1 |
| Weathering Resistance (S) | W(S) |
1~2 |
| Acid Resistance (S) | SR |
1.0 |
| Phosphate Resistance | PR |
1.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
||
| Specific Gravity | d |
3.26 |
|
| Coloring |  |
40 |
|
 |
36 |
||
Relative Partial Dispersions |
|
 |
0.7372 |
 |
0.3248 |
 |
0.2948 |
 |
0.5318 |
 |
1.2866 |
 |
0.5814 |
 |
0.5059 |
 |
1.4284 |
 |
0.7733 |
 |
0.4791 |
 |
0.5209 |
 |
1.9247 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
||
330 |
||
340 |
||
350 |
||
360 |
0.160 |
|
365 |
||
370 |
0.510 |
|
380 |
0.740 |
|
390 |
0.850 |
|
400 |
0.910 |
|
420 |
0.955 |
|
440 |
0.971 |
|
460 |
0.978 |
|
480 |
0.984 |
|
500 |
0.988 |
|
550 |
0.994 |
|
600 |
0.994 |
|
650 |
0.994 |
|
700 |
0.996 |
|
800 |
0.998 |
|
900 |
0.997 |
|
1000 |
0.997 |
|
1200 |
0.996 |
|
1400 |
0.992 |
|
1600 |
0.993 |
|
1800 |
0.988 |
|
2000 |
0.980 |
|
2200 |
0.948 |
|
2400 |
0.880 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 3.7 |
4.3 |
4.3 |
4.6 |
4.8 |
5.4 |
6.2 |
|
| -20 ~ 0 | 3.7 |
4.4 |
4.4 |
4.7 |
4.9 |
5.6 |
6.4 |
|
| 0 ~ 20 | 3.7 |
4.4 |
4.5 |
4.7 |
5.0 |
5.7 |
6.5 |
|
| 20 ~ 40 | 3.8 |
4.5 |
4.6 |
4.8 |
5.1 |
5.9 |
6.7 |
|
| 40 ~ 60 | 3.8 |
4.6 |
4.7 |
4.9 |
5.3 |
6.0 |
6.9 |
|
| 60 ~ 80 | 3.8 |
4.7 |
4.8 |
5.0 |
5.4 |
6.2 |
7.1 |
|