| OHARA | S-BAL3 |
571530 574527 |
||||||
| Refractive Index |  |
1.57135 | Abbe Number |  |
53.0 | Dispersion |  |
0.01079 |
| 1.571351 | 52.95 | 0.010790 | ||||||
 |
1.573920 |  |
52.65 |  |
0.010900 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.54361 |
 |
1.97009 | 1.54831 |
 |
1.52958 | 1.55341 |
 |
1.12864 | 1.55806 |
 |
1.01398 | 1.55965 |
 |
0.85211 | 1.56248 |
 |
0.76819 | 1.56445 |
 |
0.70652 | 1.56627 |
 |
0.65627 | 1.56810 |
 |
0.64385 | 1.56862 |
 |
0.6328 | 1.56910 |
 |
0.58929 | 1.57126 |
 |
0.58756 | 1.57135 |
 |
0.54607 | 1.57392 |
 |
0.48613 | 1.57889 |
 |
0.47999 | 1.57952 |
 |
0.44157 | 1.58409 |
 |
0.435835 | 1.58489 |
 |
0.404656 | 1.58993 |
 |
0.365015 | 1.59867 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
483 |
| Annealing Point (°C) |
AP |
516 |
| Transformation Temperature (°C) |
Tg |
531 |
| Yield Point (°C) |
At |
573 |
| Softening Point (°C) |
SP |
652 |
| Expansion Coefficient   |
-30~+70°C |
95 |
+100~+300°C |
111 |
|
Thermal Conductivity |
k |
0.864 |
Mechanical Properties |
||
Young's Modulus |
E |
719 |
| Rigidity Modulus |
G |
288 |
| Poisson's Ratio |  |
0.249 |
| Knoop Hardness | Hk |
510 [5] |
| Abrasion | Aa |
172 |
Photoelastic Constant |
 |
2.18 |
Partial Dispersions |
|
 |
0.008456 |
 |
0.003653 |
 |
0.003246 |
 |
0.005815 |
 |
0.013536 |
 |
0.005992 |
 |
0.005041 |
 |
0.013784 |
 |
0.008970 |
 |
0.005301 |
 |
0.005599 |
 |
0.019152 |
Deviation of Relative Partial Dispersions |
|
 |
-0.0114 |
 |
-0.0015 |
 |
-0.0003 |
 |
-0.0005 |
 |
-0.0041 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.29366890 | |
 |
1.32440252 |  |
 |
1.10197293 | |
 |
8.00367962 |  |
 |
3.54711196 |  |
 |
1.34517431 |  |
1129 ~ 2325 nm |
||
|
1.29366890 | |
|
1.32440252 | |
|
1.10197293 | |
|
8.00367962 | |
|
3.54711196 | |
|
1.34517431 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
3 |
| Acid Resistance (P) | RA(P) |
3 |
| Weathering Resistance (S) | W(S) |
2 |
| Acid Resistance (S) | SR |
1.2 |
| Phosphate Resistance | PR |
1.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
1 |
|
| Specific Gravity | d |
2.98 |
|
| Coloring |  |
36 |
|
 |
33 |
||
Relative Partial Dispersions |
|
 |
0.7837 |
 |
0.3386 |
 |
0.3008 |
 |
0.5389 |
 |
1.2545 |
 |
0.5553 |
 |
0.4672 |
 |
1.2775 |
 |
0.8229 |
 |
0.4863 |
 |
0.5137 |
 |
1.7571 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
||
330 |
0.010 |
|
340 |
0.260 |
|
350 |
0.630 |
|
360 |
0.840 |
|
365 |
||
370 |
0.928 |
|
380 |
0.963 |
|
390 |
0.979 |
|
400 |
0.988 |
|
420 |
0.994 |
|
440 |
0.994 |
|
460 |
0.995 |
|
480 |
0.996 |
|
500 |
0.997 |
|
550 |
0.998 |
|
600 |
0.998 |
|
650 |
0.998 |
|
700 |
0.998 |
|
800 |
0.998 |
|
900 |
0.998 |
|
1000 |
0.997 |
|
1200 |
0.996 |
|
1400 |
0.991 |
|
1600 |
0.990 |
|
1800 |
0.972 |
|
2000 |
0.945 |
|
2200 |
0.880 |
|
2400 |
0.830 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | -1.0 |
-0.8 |
-0.7 |
-0.6 |
-0.5 |
-0.1 |
0.2 |
|
| -20 ~ 0 | -1.0 |
-0.7 |
-0.7 |
-0.6 |
-0.4 |
-0.1 |
0.3 |
|
| 0 ~ 20 | -1.0 |
-0.7 |
-0.7 |
-0.6 |
-0.4 |
0.4 |
||
| 20 ~ 40 | -1.0 |
-0.7 |
-0.6 |
-0.5 |
-0.3 |
0.1 |
0.5 |
|
| 40 ~ 60 | -1.0 |
-0.7 |
-0.6 |
-0.5 |
-0.3 |
0.1 |
0.5 |
|
| 60 ~ 80 | -1.0 |
-0.6 |
-0.6 |
-0.4 |
-0.2 |
0.2 |
0.6 |
|