| OHARA | PBL25Y |
581408 585405 |
||||||
| Refractive Index |  |
1.58144 | Abbe Number |  |
40.8 | Dispersion |  |
0.01426 |
| 1.581439 | 40.77 | 0.014263 | ||||||
 |
1.584824 |  |
40.49 |  |
0.014442 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.54936 |
 |
1.97009 | 1.55423 |
 |
1.52958 | 1.55961 |
 |
1.12864 | 1.56480 |
 |
1.01398 | 1.56667 |
 |
0.85211 | 1.57011 |
 |
0.76819 | 1.57256 |
 |
0.70652 | 1.57487 |
 |
0.65627 | 1.57722 |
 |
0.64385 | 1.57788 |
 |
0.6328 | 1.57850 |
 |
0.58929 | 1.58131 |
 |
0.58756 | 1.58144 |
 |
0.54607 | 1.58482 |
 |
0.48613 | 1.59148 |
 |
0.47999 | 1.59232 |
 |
0.44157 | 1.59856 |
 |
0.435835 | 1.59967 |
 |
0.404656 | 1.60670 |
 |
0.365015 | 1.61928 |
 |
0.334148 | 1.63387 |
 |
0.326106 | 1.63876 |
Thermal Properties |
||
| Strain Point (°C) |
StP |
381 |
| Annealing Point (°C) |
AP |
420 |
| Transformation Temperature (°C) |
Tg |
440 |
| Yield Point (°C) |
At |
468 |
| Softening Point (°C) |
SP |
590 |
| Expansion Coefficient   |
-30~+70°C |
87 |
+100~+300°C |
98 |
|
Thermal Conductivity |
k |
0.899 |
Mechanical Properties |
||
Young's Modulus |
E |
585 |
| Rigidity Modulus |
G |
240 |
| Poisson's Ratio |  |
0.219 |
| Knoop Hardness | Hk |
460 [5] |
| Abrasion | Aa |
130 |
Photoelastic Constant |
 |
2.99 |
Partial Dispersions |
|
 |
0.010546 |
 |
0.004656 |
 |
0.004222 |
 |
0.007607 |
 |
0.018226 |
 |
0.008185 |
 |
0.007038 |
 |
0.019619 |
 |
0.011210 |
 |
0.006943 |
 |
0.007499 |
 |
0.026961 |
Deviation of Relative Partial Dispersions |
|
 |
0.0014 |
 |
0.0011 |
 |
-0.0021 |
 |
-0.0016 |
 |
-0.0081 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.31960626 | |
 |
1.23752633 |  |
 |
2.10055351 | |
 |
1.01863415 |  |
 |
4.83593508 | |
 |
2.73272029 |  |
1129 ~ 2325 nm |
||
|
1.29915001 | |
|
1.44676555 | |
|
1.00019303 | |
|
9.67218844 |  |
|
4.65408008 | |
|
1.20780522 |  |
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 |
3.23 |
|
| Coloring |  |
34 |
|
 |
31 |
||
Relative Partial Dispersions |
|
 |
0.7394 |
 |
0.3264 |
 |
0.2960 |
 |
0.5333 |
 |
1.2779 |
 |
0.5739 |
 |
0.4934 |
 |
1.3755 |
 |
0.7762 |
 |
0.4808 |
 |
0.5192 |
 |
1.8668 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
0.010 |
|
320 |
0.350 |
0.070 |
330 |
0.780 |
0.540 |
340 |
0.940 |
0.850 |
350 |
0.981 |
0.954 |
360 |
0.993 |
0.982 |
365 |
0.995 |
0.986 |
370 |
0.996 |
0.990 |
380 |
0.997 |
0.993 |
390 |
0.998 |
0.995 |
400 |
0.998 |
0.996 |
420 |
0.998 |
0.996 |
440 |
0.998 |
0.996 |
460 |
0.999 |
0.997 |
480 |
0.999 |
0.998 |
500 |
0.999 |
0.998 |
550 |
0.999 |
0.998 |
600 |
0.999 |
0.998 |
650 |
0.999 |
0.998 |
700 |
0.999 |
0.999 |
800 |
0.999 |
0.999 |
900 |
0.999 |
0.998 |
1000 |
0.998 |
0.996 |
1200 |
0.998 |
0.995 |
1400 |
0.996 |
0.990 |
1600 |
0.994 |
0.984 |
1800 |
0.979 |
0.948 |
2000 |
0.953 |
0.880 |
2200 |
0.905 |
0.780 |
2400 |
0.870 |
0.700 |
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 1.8 |
2.4 |
2.5 |
2.7 |
2.9 |
3.5 |
4.2 |
6.3 |
| -20 ~ 0 | 1.9 |
2.5 |
2.6 |
2.8 |
3.1 |
3.7 |
4.4 |
6.5 |
| 0 ~ 20 | 1.9 |
2.6 |
2.7 |
2.9 |
3.2 |
3.8 |
4.5 |
6.8 |
| 20 ~ 40 | 2.0 |
2.7 |
2.8 |
3.0 |
3.3 |
4.0 |
4.7 |
7.0 |
| 40 ~ 60 | 2.1 |
2.8 |
2.9 |
3.1 |
3.4 |
4.1 |
4.9 |
7.3 |
| 60 ~ 80 | 2.1 |
2.9 |
3.0 |
3.2 |
3.5 |
4.3 |
5.1 |
7.5 |