| OHARA | L-BBH1 |
102168 117166 |
||||||
| Refractive Index |  |
2.10225 | Abbe Number |  |
16.8 | Dispersion |  |
0.06571 |
| 2.102250 | 16.77 | 0.065711 | ||||||
 |
2.117570 |  |
16.62 |  |
0.067232 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 2.01137 |
 |
1.97009 | 2.01795 |
 |
1.52958 | 2.02684 |
 |
1.12864 | 2.03904 |
 |
1.01398 | 2.04461 |
 |
0.85211 | 2.05626 |
 |
0.76819 | 2.06542 |
 |
0.70652 | 2.07449 |
 |
0.65627 | 2.08410 |
 |
0.64385 | 2.08688 |
 |
0.6328 | 2.08952 |
 |
0.58929 | 2.10170 |
 |
0.58756 | 2.10225 |
 |
0.54607 | 2.11757 |
 |
0.48613 | 2.14981 |
 |
0.47999 | 2.15411 |
 |
0.44157 | 2.18769 |
 |
0.435835 | 2.19398 |
 |
0.404656 | |
 |
0.365015 | |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
|
| Annealing Point (°C) |
AP |
|
| Transformation Temperature (°C) |
Tg |
350 |
| Yield Point (°C) |
At |
378 |
| Softening Point (°C) |
SP |
|
| Expansion Coefficient   |
-30~+70°C |
107 |
+100~+300°C |
126 |
|
Thermal Conductivity |
k |
0.838 |
Mechanical Properties |
||
Young's Modulus |
E |
2769 |
| Rigidity Modulus |
G |
1088 |
| Poisson's Ratio |  |
0.273 |
| Knoop Hardness | Hk |
330 [3] |
| Abrasion | Aa |
384 |
Photoelastic Constant |
 |
0.75 |
Partial Dispersions |
|
 |
0.039489 |
 |
0.018683 |
 |
0.018150 |
 |
0.033472 |
 |
0.091729 |
 |
0.044168 |
 |
|
 |
|
 |
0.042271 |
 |
0.030690 |
 |
0.036542 |
 |
|
Deviation of Relative Partial Dispersions |
|
 |
-0.0244 |
 |
-0.0119 |
 |
0.0660 |
 |
0.0579 |
 |
|
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
2.56949414 | |
 |
5.24386192 |  |
 |
1.40160566 | |
 |
2.05613974 |  |
 |
8.33484540 | |
 |
1.19733343 |  |
1129 ~ 2325 nm |
||
|
2.56949414 | |
|
5.24386192 | |
|
1.40160566 | |
|
2.05613974 | |
|
8.33484540 | |
|
1.19733343 | |
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
2 |
| Weathering Resistance (S) | W(S) |
3 |
| Acid Resistance (S) | SR |
53.2 |
| Phosphate Resistance | PR |
2.2 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
||
| Specific Gravity | d |
6.57 |
|
| Coloring |  |
47 |
|
 |
43 |
||
Relative Partial Dispersions |
|
 |
0.6009 |
 |
0.2843 |
 |
0.2762 |
 |
0.5094 |
 |
1.3959 |
 |
0.6722 |
 |
|
 |
|
 |
0.6287 |
 |
0.4565 |
 |
0.5435 |
 |
|
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
||
330 |
||
340 |
||
350 |
||
360 |
||
365 |
||
370 |
||
380 |
||
390 |
||
400 |
||
420 |
0.010 |
|
440 |
0.510 |
|
460 |
0.860 |
|
480 |
0.948 |
|
500 |
0.971 |
|
550 |
0.984 |
|
600 |
0.980 |
|
650 |
0.977 |
|
700 |
0.978 |
|
800 |
0.983 |
|
900 |
0.988 |
|
1000 |
0.991 |
|
1200 |
0.991 |
|
1400 |
0.995 |
|
1600 |
0.993 |
|
1800 |
0.987 |
|
2000 |
0.975 |
|
2200 |
0.945 |
|
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 | ||||||||
| -20 ~ 0 | ||||||||
| 0 ~ 20 | ||||||||
| 20 ~ 40 | ||||||||
| 40 ~ 60 | ||||||||
| 60 ~ 80 | ||||||||