| OHARA | S-FSL5Y |
487703 489702 |
||||||
| Refractive Index |  |
1.48749 | Abbe Number |  |
70.3 | Dispersion |  |
0.00693 |
| 1.487490 | 70.36 | 0.006929 | ||||||
 |
1.489145 |  |
70.17 |  |
0.006971 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.46218 |
 |
1.97009 | 1.46761 |
 |
1.52958 | 1.47323 |
 |
1.12864 | 1.47778 |
 |
1.01398 | 1.47915 |
 |
0.85211 | 1.48138 |
 |
0.76819 | 1.48282 |
 |
0.70652 | 1.48410 |
 |
0.65627 | 1.48535 |
 |
0.64385 | 1.48569 |
 |
0.6328 | 1.48601 |
 |
0.58929 | 1.48743 |
 |
0.58756 | 1.48749 |
 |
0.54607 | 1.48915 |
 |
0.48613 | 1.49228 |
 |
0.47999 | 1.49266 |
 |
0.44157 | 1.49546 |
 |
0.435835 | 1.49594 |
 |
0.404656 | 1.49896 |
 |
0.365015 | 1.50404 |
 |
0.334148 | 1.50946 |
 |
0.326106 | 1.51116 |
Thermal Properties |
||
| Strain Point (°C) |
StP |
465 |
| Annealing Point (°C) |
AP |
502 |
| Transformation Temperature (°C) |
Tg |
500 |
| Yield Point (°C) |
At |
567 |
| Softening Point (°C) |
SP |
676 |
| Expansion Coefficient   |
-30~+70°C |
89 |
+100~+300°C |
97 |
|
Thermal Conductivity |
k |
1.002 |
Mechanical Properties |
||
Young's Modulus |
E |
622 |
| Rigidity Modulus |
G |
253 |
| Poisson's Ratio |  |
0.229 |
| Knoop Hardness | Hk |
530 [5] |
| Abrasion | Aa |
113 |
Photoelastic Constant |
 |
2.87 |
Partial Dispersions |
|
 |
0.006201 |
 |
0.002523 |
 |
0.002144 |
 |
0.003799 |
 |
0.008455 |
 |
0.003670 |
 |
0.003015 |
 |
0.008099 |
 |
0.006546 |
 |
0.003454 |
 |
0.003517 |
 |
0.011382 |
Deviation of Relative Partial Dispersions |
|
 |
0.0181 |
 |
0.0029 |
 |
0.0016 |
 |
0.0021 |
 |
0.0331 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
9.77409944 |  |
 |
2.10950834 | |
 |
1.37142848 | |
 |
5.57649364 |  |
 |
1.77000313 |  |
 |
1.49211443 |  |
1129 ~ 2325 nm |
||
|
8.79731455 | |
|
3.08634219 | |
|
1.02136885 | |
|
4.90947559 | |
|
1.57419667 | |
|
1.11412218 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
3 |
| Acid Resistance (P) | RA(P) |
4 |
| Weathering Resistance (S) | W(S) |
2 |
| Acid Resistance (S) | SR |
3.0 |
| Phosphate Resistance | PR |
2.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
1 |
|
| Specific Gravity | d |
2.46 |
|
| Coloring |  |
30 |
|
 |
27 |
||
Relative Partial Dispersions |
|
 |
0.8949 |
 |
0.3641 |
 |
0.3094 |
 |
0.5483 |
 |
1.2202 |
 |
0.5297 |
 |
0.4351 |
 |
1.1689 |
 |
0.9390 |
 |
0.4955 |
 |
0.5045 |
 |
1.6328 |
Internal Transmittance |
||
 |
 |
 |
280 |
0.190 |
0.010 |
290 |
0.610 |
0.290 |
300 |
0.860 |
0.680 |
310 |
0.954 |
0.890 |
320 |
0.984 |
0.961 |
330 |
0.993 |
0.983 |
340 |
0.997 |
0.993 |
350 |
0.998 |
0.995 |
360 |
0.998 |
0.996 |
365 |
0.999 |
0.997 |
370 |
0.999 |
0.998 |
380 |
0.999 |
0.998 |
390 |
0.999 |
0.998 |
400 |
0.999 |
0.999 |
420 |
0.999 |
0.999 |
440 |
0.999 |
0.999 |
460 |
0.999 |
0.999 |
480 |
0.999 |
0.999 |
500 |
0.999 |
0.999 |
550 |
0.999 |
0.999 |
600 |
0.999 |
0.999 |
650 |
0.999 |
0.998 |
700 |
0.999 |
0.999 |
800 |
0.999 |
0.999 |
900 |
0.999 |
0.997 |
1000 |
0.998 |
0.994 |
1200 |
0.997 |
0.992 |
1400 |
0.981 |
0.952 |
1600 |
0.991 |
0.977 |
1800 |
0.983 |
0.958 |
2000 |
0.968 |
0.921 |
2200 |
0.860 |
0.700 |
2400 |
0.850 |
0.670 |
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | -1.2 |
-1.2 |
-1.2 |
-1.1 |
-1.1 |
-0.9 |
-0.7 |
-0.3 |
| -20 ~ 0 | -1.2 |
-1.1 |
-1.1 |
-1.0 |
-1.0 |
-0.8 |
-0.6 |
-0.2 |
| 0 ~ 20 | -1.2 |
-1.0 |
-1.0 |
-0.9 |
-0.8 |
-0.7 |
-0.5 |
|
| 20 ~ 40 | -1.1 |
-0.9 |
-0.9 |
-0.8 |
-0.7 |
-0.6 |
-0.4 |
0.1 |
| 40 ~ 60 | -1.0 |
-0.8 |
-0.8 |
-0.7 |
-0.6 |
-0.5 |
-0.3 |
0.3 |
| 60 ~ 80 | -1.0 |
-0.7 |
-0.7 |
-0.6 |
-0.5 |
-0.3 |
-0.1 |
0.4 |