| OHARA | S-BAL12 |
540595 542592 |
||||||
| Refractive Index |  |
1.53996 | Abbe Number |  |
59.5 | Dispersion |  |
0.00908 |
| 1.539956 | 59.46 | 0.009081 | ||||||
 |
1.542121 |  |
59.20 |  |
0.009158 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.51358 |
 |
1.97009 | 1.51848 |
 |
1.52958 | 1.52370 |
 |
1.12864 | 1.52825 |
 |
1.01398 | 1.52974 |
 |
0.85211 | 1.53230 |
 |
0.76819 | 1.53404 |
 |
0.70652 | 1.53562 |
 |
0.65627 | 1.53719 |
 |
0.64385 | 1.53763 |
 |
0.6328 | 1.53804 |
 |
0.58929 | 1.53988 |
 |
0.58756 | 1.53996 |
 |
0.54607 | 1.54212 |
 |
0.48613 | 1.54627 |
 |
0.47999 | 1.54679 |
 |
0.44157 | 1.55056 |
 |
0.435835 | 1.55122 |
 |
0.404656 | 1.55532 |
 |
0.365015 | 1.56232 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
432 |
| Annealing Point (°C) |
AP |
468 |
| Transformation Temperature (°C) |
Tg |
478 |
| Yield Point (°C) |
At |
527 |
| Softening Point (°C) |
SP |
624 |
| Expansion Coefficient   |
-30~+70°C |
86 |
+100~+300°C |
102 |
|
Thermal Conductivity |
k |
0.982 |
Mechanical Properties |
||
Young's Modulus |
E |
710 |
| Rigidity Modulus |
G |
306 |
| Poisson's Ratio |  |
0.161 |
| Knoop Hardness | Hk |
520 [5] |
| Abrasion | Aa |
105 |
Photoelastic Constant |
 |
2.60 |
Partial Dispersions |
|
 |
0.007456 |
 |
0.003156 |
 |
0.002762 |
 |
0.004927 |
 |
0.011260 |
 |
0.004941 |
 |
0.004105 |
 |
0.011107 |
 |
0.007896 |
 |
0.004487 |
 |
0.004671 |
 |
0.015531 |
Deviation of Relative Partial Dispersions |
|
 |
-0.0046 |
 |
-0.0005 |
 |
-0.0012 |
 |
-0.0012 |
 |
-0.0040 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
7.14605258 |  |
 |
6.21993289 | |
 |
1.22537681 | |
 |
3.01763913 |  |
 |
1.66505450 |  |
 |
1.43506314 |  |
1129 ~ 2325 nm |
||
|
7.14605258 | |
|
6.21993289 | |
|
1.22537681 | |
|
3.01763913 | |
|
1.66505450 | |
|
1.43506314 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
2 |
| Acid Resistance (P) | RA(P) |
1 |
| Weathering Resistance (S) | W(S) |
1 |
| 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 |
2.75 |
|
| Coloring |  |
33 |
|
 |
30 |
||
Relative Partial Dispersions |
|
 |
0.8211 |
 |
0.3475 |
 |
0.3042 |
 |
0.5426 |
 |
1.2400 |
 |
0.5441 |
 |
0.4520 |
 |
1.2231 |
 |
0.8622 |
 |
0.4900 |
 |
0.5100 |
 |
1.6959 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
0.020 |
|
310 |
0.230 |
|
320 |
0.570 |
|
330 |
0.800 |
|
340 |
0.914 |
|
350 |
0.959 |
|
360 |
0.979 |
|
365 |
||
370 |
0.989 |
|
380 |
0.992 |
|
390 |
0.995 |
|
400 |
0.997 |
|
420 |
0.997 |
|
440 |
0.997 |
|
460 |
0.997 |
|
480 |
0.998 |
|
500 |
0.999 |
|
550 |
0.999 |
|
600 |
0.999 |
|
650 |
0.998 |
|
700 |
0.999 |
|
800 |
0.999 |
|
900 |
0.999 |
|
1000 |
0.999 |
|
1200 |
0.999 |
|
1400 |
0.993 |
|
1600 |
0.995 |
|
1800 |
0.983 |
|
2000 |
0.966 |
|
2200 |
0.920 |
|
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 | 1.4 |
1.7 |
1.8 |
1.8 |
2.0 |
2.3 |
2.6 |
|
| -20 ~ 0 | 1.4 |
1.7 |
1.8 |
1.9 |
2.0 |
2.3 |
2.6 |
|
| 0 ~ 20 | 1.4 |
1.7 |
1.8 |
1.9 |
2.0 |
2.3 |
2.7 |
|
| 20 ~ 40 | 1.4 |
1.7 |
1.8 |
1.9 |
2.0 |
2.4 |
2.7 |
|
| 40 ~ 60 | 1.4 |
1.7 |
1.8 |
1.9 |
2.1 |
2.4 |
2.8 |
|
| 60 ~ 80 | 1.4 |
1.8 |
1.8 |
1.9 |
2.1 |
2.4 |
2.8 |
|