| OHARA | S-FSL5 |
487702 489701 |
||||||
| Refractive Index |  |
1.48749 | Abbe Number |  |
70.2 | Dispersion |  |
0.00694 |
| 1.487490 | 70.23 | 0.006941 | ||||||
 |
1.489147 |  |
70.04 |  |
0.006984 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.46227 |
 |
1.97009 | 1.46765 |
 |
1.52958 | 1.47324 |
 |
1.12864 | 1.47778 |
 |
1.01398 | 1.47915 |
 |
0.85211 | 1.48138 |
 |
0.76819 | 1.48282 |
 |
0.70652 | 1.48410 |
 |
0.65627 | 1.48534 |
 |
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 | 1.49267 |
 |
0.44157 | 1.49548 |
 |
0.435835 | 1.49596 |
 |
0.404656 | 1.49898 |
 |
0.365015 | 1.50406 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
457 |
| Annealing Point (°C) |
AP |
491 |
| Transformation Temperature (°C) |
Tg |
500 |
| Yield Point (°C) |
At |
568 |
| Softening Point (°C) |
SP |
679 |
| Expansion Coefficient   |
-30~+70°C |
90 |
+100~+300°C |
95 |
|
Thermal Conductivity |
k |
1.007 |
Mechanical Properties |
||
Young's Modulus |
E |
623 |
| Rigidity Modulus |
G |
254 |
| Poisson's Ratio |  |
0.227 |
| Knoop Hardness | Hk |
520 [5] |
| Abrasion | Aa |
111 |
Photoelastic Constant |
 |
2.87 |
Partial Dispersions |
|
 |
0.006194 |
 |
0.002522 |
 |
0.002146 |
 |
0.003803 |
 |
0.008474 |
 |
0.003679 |
 |
0.003019 |
 |
0.008099 |
 |
0.006539 |
 |
0.003458 |
 |
0.003526 |
 |
0.011390 |
Deviation of Relative Partial Dispersions |
|
 |
0.0162 |
 |
0.0023 |
 |
0.0020 |
 |
0.0022 |
 |
0.0299 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.17447043 | |
 |
1.40056154 |  |
 |
1.19272435 | |
 |
8.41855181 |  |
 |
-5.81790767 | |
 |
1.29599726 |  |
1129 ~ 2325 nm |
||
|
1.17447043 | |
|
1.40056154 | |
|
1.19272435 | |
|
8.41855181 | |
|
-5.81790767 | |
|
1.29599726 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
3 |
| Acid Resistance (P) | RA(P) |
4 |
| Weathering Resistance (S) | W(S) |
1~2 |
| 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 |
|
 |
0.8924 |
 |
0.3633 |
 |
0.3092 |
 |
0.5479 |
 |
1.2209 |
 |
0.5300 |
 |
0.4350 |
 |
1.1668 |
 |
0.9363 |
 |
0.4951 |
 |
0.5049 |
 |
1.6309 |
Internal Transmittance |
||
 |
 |
 |
280 |
0.130 |
|
290 |
0.430 |
|
300 |
0.730 |
|
310 |
0.890 |
|
320 |
0.961 |
|
330 |
0.984 |
|
340 |
0.992 |
|
350 |
0.995 |
|
360 |
0.995 |
|
365 |
||
370 |
0.998 |
|
380 |
0.998 |
|
390 |
0.999 |
|
400 |
0.999 |
|
420 |
0.999 |
|
440 |
0.999 |
|
460 |
0.999 |
|
480 |
0.999 |
|
500 |
0.999 |
|
550 |
0.999 |
|
600 |
0.999 |
|
650 |
0.999 |
|
700 |
0.999 |
|
800 |
0.999 |
|
900 |
0.999 |
|
1000 |
0.998 |
|
1200 |
0.998 |
|
1400 |
0.982 |
|
1600 |
0.992 |
|
1800 |
0.985 |
|
2000 |
0.971 |
|
2200 |
0.880 |
|
2400 |
0.870 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | -1.3 |
-1.2 |
-1.2 |
-1.1 |
-1.1 |
-0.9 |
-0.7 |
|
| -20 ~ 0 | -1.3 |
-1.1 |
-1.1 |
-1.0 |
-1.0 |
-0.8 |
-0.6 |
|
| 0 ~ 20 | -1.3 |
-1.1 |
-1.0 |
-0.9 |
-0.8 |
-0.6 |
-0.4 |
|
| 20 ~ 40 | -1.1 |
-0.8 |
-0.8 |
-0.7 |
-0.6 |
-0.4 |
-0.3 |
|
| 40 ~ 60 | -1.0 |
-0.6 |
-0.6 |
-0.5 |
-0.4 |
-0.2 |
||
| 60 ~ 80 | -0.9 |
-0.4 |
-0.4 |
-0.3 |
-0.2 |
-0.1 |
0.2 |
|