| OHARA | S-FPL53 |
439950 440946 |
||||||
| Refractive Index |  |
1.43875 | Abbe Number |  |
95.0 | Dispersion |  |
0.00462 |
| 1.438750 | 94.93 | 0.004622 | ||||||
 |
1.439854 |  |
94.49 |  |
0.004655 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.42512 |
 |
1.97009 | 1.42762 |
 |
1.52958 | 1.43032 |
 |
1.12864 | 1.43269 |
 |
1.01398 | 1.43346 |
 |
0.85211 | 1.43480 |
 |
0.76819 | 1.43570 |
 |
0.70652 | 1.43652 |
 |
0.65627 | 1.43733 |
 |
0.64385 | 1.43756 |
 |
0.6328 | 1.43777 |
 |
0.58929 | 1.43871 |
 |
0.58756 | 1.43875 |
 |
0.54607 | 1.43985 |
 |
0.48613 | 1.44195 |
 |
0.47999 | 1.44221 |
 |
0.44157 | 1.44410 |
 |
0.435835 | 1.44442 |
 |
0.404656 | 1.44645 |
 |
0.365015 | 1.44986 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
|
| Annealing Point (°C) |
AP |
|
| Transformation Temperature (°C) |
Tg |
426 |
| Yield Point (°C) |
At |
456 |
| Softening Point (°C) |
SP |
|
| Expansion Coefficient   |
-30~+70°C |
145 |
+100~+300°C |
169 |
|
Thermal Conductivity |
k |
0.857 |
Mechanical Properties |
||
Young's Modulus |
E |
691 |
| Rigidity Modulus |
G |
265 |
| Poisson's Ratio |  |
0.303 |
| Knoop Hardness | Hk |
320 [3] |
| Abrasion | Aa |
451 |
Photoelastic Constant |
 |
0.57 |
Partial Dispersions |
|
 |
0.003870 |
 |
0.001631 |
 |
0.001417 |
 |
0.002521 |
 |
0.005673 |
 |
0.002468 |
 |
0.002028 |
 |
0.005437 |
 |
0.004097 |
 |
0.002294 |
 |
0.002361 |
 |
0.007645 |
Deviation of Relative Partial Dispersions |
|
 |
-0.1548 |
 |
-0.0381 |
 |
0.0598 |
 |
0.0461 |
 |
0.2462 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
9.83532327 |  |
 |
6.95688140 |  |
 |
1.11409238 | |
 |
4.92234955 |  |
 |
1.93581091 | |
 |
2.64275294 |  |
1129 ~ 2325 nm |
||
|
9.83532327 | |
|
6.95688140 | |
|
1.11409238 | |
|
4.92234955 | |
|
1.93581091 | |
|
2.64275294 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
3 |
| Weathering Resistance (S) | W(S) |
3 |
| Acid Resistance (S) | SR |
52.3 |
| Phosphate Resistance | PR |
4.3 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
1 |
|
| Specific Gravity | d |
3.62 |
|
| Coloring |  |
33 |
|
 |
28 |
||
Relative Partial Dispersions |
|
 |
0.8373 |
 |
0.3529 |
 |
0.3066 |
 |
0.5454 |
 |
1.2274 |
 |
0.5340 |
 |
0.4388 |
 |
1.1763 |
 |
0.8801 |
 |
0.4928 |
 |
0.5072 |
 |
1.6423 |
Internal Transmittance |
||
 |
 |
 |
280 |
0.040 |
|
290 |
0.120 |
|
300 |
0.280 |
|
310 |
0.510 |
|
320 |
0.710 |
|
330 |
0.850 |
|
340 |
0.928 |
|
350 |
0.967 |
|
360 |
0.985 |
|
365 |
||
370 |
0.992 |
|
380 |
0.996 |
|
390 |
0.997 |
|
400 |
0.996 |
|
420 |
0.995 |
|
440 |
0.995 |
|
460 |
0.996 |
|
480 |
0.997 |
|
500 |
0.998 |
|
550 |
0.999 |
|
600 |
0.998 |
|
650 |
0.997 |
|
700 |
0.998 |
|
800 |
0.998 |
|
900 |
0.997 |
|
1000 |
0.997 |
|
1200 |
0.998 |
|
1400 |
0.998 |
|
1600 |
0.998 |
|
1800 |
0.998 |
|
2000 |
0.998 |
|
2200 |
0.997 |
|
2400 |
0.998 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | -5.9 |
-5.8 |
-5.8 |
-5.7 |
-5.7 |
-5.6 |
-5.5 |
|
| -20 ~ 0 | -6.2 |
-6.1 |
-6.1 |
-6.1 |
-6.0 |
-5.9 |
-5.8 |
|
| 0 ~ 20 | -6.5 |
-6.4 |
-6.4 |
-6.4 |
-6.3 |
-6.2 |
-6.1 |
|
| 20 ~ 40 | -6.9 |
-6.8 |
-6.7 |
-6.7 |
-6.6 |
-6.5 |
-6.4 |
|
| 40 ~ 60 | -7.2 |
-7.1 |
-7.1 |
-7.0 |
-7.0 |
-6.8 |
-6.7 |
|
| 60 ~ 80 | -7.5 |
-7.4 |
-7.4 |
-7.3 |
-7.3 |
-7.2 |
-7.0 |
|