| OHARA | PBL26Y |
567428 570426 |
||||||
| Refractive Index |  |
1.56732 | Abbe Number |  |
42.8 | Dispersion |  |
0.01324 |
| 1.567322 | 42.86 | 0.013238 | ||||||
 |
1.570466 |  |
42.58 |  |
0.013399 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.53658 |
 |
1.97009 | 1.54138 |
 |
1.52958 | 1.54668 |
 |
1.12864 | 1.55170 |
 |
1.01398 | 1.55348 |
 |
0.85211 | 1.55673 |
 |
0.76819 | 1.55904 |
 |
0.70652 | 1.56120 |
 |
0.65627 | 1.56339 |
 |
0.64385 | 1.56401 |
 |
0.6328 | 1.56459 |
 |
0.58929 | 1.56721 |
 |
0.58756 | 1.56732 |
 |
0.54607 | 1.57047 |
 |
0.48613 | 1.57663 |
 |
0.47999 | 1.57741 |
 |
0.44157 | 1.58317 |
 |
0.435835 | 1.58418 |
 |
0.404656 | 1.59065 |
 |
0.365015 | 1.60217 |
 |
0.334148 | 1.61543 |
 |
0.326106 | 1.61986 |
Thermal Properties |
||
| Strain Point (°C) |
StP |
380 |
| Annealing Point (°C) |
AP |
418 |
| Transformation Temperature (°C) |
Tg |
432 |
| Yield Point (°C) |
At |
471 |
| Softening Point (°C) |
SP |
591 |
| Expansion Coefficient   |
-30~+70°C |
89 |
+100~+300°C |
100 |
|
Thermal Conductivity |
k |
0.912 |
Mechanical Properties |
||
Young's Modulus |
E |
589 |
| Rigidity Modulus |
G |
242 |
| Poisson's Ratio |  |
0.220 |
| Knoop Hardness | Hk |
420 [4] |
| Abrasion | Aa |
136 |
Photoelastic Constant |
 |
|
Partial Dispersions |
|
 |
0.009910 |
 |
0.004353 |
 |
0.003931 |
 |
0.007075 |
 |
0.168610 |
 |
0.007554 |
 |
0.006471 |
 |
0.017986 |
 |
0.010529 |
 |
0.006456 |
 |
0.006943 |
 |
0.024760 |
Deviation of Relative Partial Dispersions |
|
 |
0.0008 |
 |
0.0010 |
 |
-0.0020 |
 |
-0.0015 |
 |
-0.0074 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.29471773 | |
 |
1.08880981 |  |
 |
2.20322964 | |
 |
9.86579479 |  |
 |
4.77568828 |  |
 |
2.88509863 |  |
1129 ~ 2325 nm |
||
|
1.27520167 | |
|
1.28823528 | |
|
1.01138010 | |
|
9.37656096 | |
|
4.58001584 | |
|
1.23589724 |  |
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 |
||
| Specific Gravity | d |
3.10 |
|
| Coloring |  |
33 |
|
 |
31 |
||
Relative Partial Dispersions |
|
 |
0.7486 |
 |
0.3288 |
 |
0.2969 |
 |
0.5344 |
 |
1.2737 |
 |
0.5706 |
 |
0.4888 |
 |
1.3587 |
 |
0.7858 |
 |
0.4818 |
 |
0.5182 |
 |
1.8479 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
0.040 |
|
320 |
0.470 |
0.150 |
330 |
0.840 |
0.650 |
340 |
0.957 |
0.890 |
350 |
0.985 |
0.963 |
360 |
0.994 |
0.986 |
365 |
0.996 |
0.989 |
370 |
0.997 |
0.992 |
380 |
0.998 |
0.995 |
390 |
0.998 |
0.996 |
400 |
0.998 |
0.996 |
420 |
0.999 |
0.997 |
440 |
0.999 |
0.997 |
460 |
0.999 |
0.998 |
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 |
0.997 |
1000 |
0.998 |
0.994 |
1200 |
0.997 |
0.993 |
1400 |
0.996 |
0.990 |
1600 |
0.994 |
0.984 |
1800 |
0.979 |
0.948 |
2000 |
0.950 |
0.870 |
2200 |
0.890 |
0.760 |
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 | 0.9 |
1.5 |
1.5 |
1.7 |
2.0 |
2.5 |
3.0 |
4.9 |
| -20 ~ 0 | 1.0 |
1.6 |
1.7 |
1.8 |
2.1 |
2.6 |
3.2 |
5.1 |
| 0 ~ 20 | 1.1 |
1.7 |
1.8 |
2.0 |
2.2 |
2.8 |
3.4 |
5.4 |
| 20 ~ 40 | 1.2 |
1.9 |
1.9 |
2.1 |
2.4 |
3.0 |
3.6 |
5.7 |
| 40 ~ 60 | 1.3 |
2.0 |
2.0 |
2.2 |
2.5 |
3.1 |
3.8 |
5.9 |
| 60 ~ 80 | 1.4 |
2.1 |
2.1 |
2.4 |
2.6 |
3.3 |
4.0 |
6.2 |