| OHARA | S-LAH65V |
804466 808463 |
||||||
| Refractive Index |  |
1.80400 | Abbe Number |  |
46.6 | Dispersion |  |
0.01726 |
| 1.804000 | 46.58 | 0.017259 | ||||||
 |
1.808107 |  |
46.34 |  |
0.017440 | |||
Refractive Indices |
||
 |
||
 |
2.32542 | 1.75986 |
 |
1.97009 | 1.76741 |
 |
1.52958 | 1.77552 |
 |
1.12864 | 1.78286 |
 |
1.01398 | 1.78538 |
 |
0.85211 | 1.78987 |
 |
0.76819 | 1.79300 |
 |
0.70652 | 1.79590 |
 |
0.65627 | 1.79882 |
 |
0.64385 | 1.79964 |
 |
0.6328 | 1.80041 |
 |
0.58929 | 1.80385 |
 |
0.58756 | 1.80400 |
 |
0.54607 | 1.80811 |
 |
0.48613 | 1.81608 |
 |
0.47999 | 1.81708 |
 |
0.44157 | 1.82441 |
 |
0.435835 | 1.82569 |
 |
0.404656 | 1.83380 |
 |
0.365015 | 1.84786 |
 |
0.334148 | |
 |
0.326106 | |
Thermal Properties |
||
| Strain Point (°C) |
StP |
639 |
| Annealing Point (°C) |
AP |
664 |
| Transformation Temperature (°C) |
Tg |
691 |
| Yield Point (°C) |
At |
711 |
| Softening Point (°C) |
SP |
740 |
| Expansion Coefficient   |
-30~+70°C |
60 |
+100~+300°C |
74 |
|
Thermal Conductivity |
k |
0.841 |
Mechanical Properties |
||
Young's Modulus |
E |
1220 |
| Rigidity Modulus |
G |
470 |
| Poisson's Ratio |  |
0.298 |
| Knoop Hardness | Hk |
730 [7] |
| Abrasion | Aa |
55 |
Photoelastic Constant |
 |
1.44 |
Partial Dispersions |
|
 |
0.013439 |
 |
0.005818 |
 |
0.005183 |
 |
0.009290 |
 |
0.021694 |
 |
0.009618 |
 |
0.008101 |
 |
0.022167 |
 |
0.014259 |
 |
0.008470 |
 |
0.008970 |
 |
0.030784 |
Deviation of Relative Partial Dispersions |
|
 |
0.0135 |
 |
0.0048 |
 |
-0.0110 |
 |
-0.0088 |
 |
-0.0506 |
Constants of Dispersion Formula |
||
326 ~ 1129 nm |
||
 |
1.81419034 |  |
 |
3.61376301 |  |
 |
1.32729484 | |
 |
8.74935029 |  |
 |
3.18352836 |  |
 |
9.13406898 |  |
1129 ~ 2325 nm |
||
|
||
|
||
|
||
|
||
|
||
|
||
Chemical Properties |
||
| Water Resistance (P) | RW(P) |
1 |
| Acid Resistance (P) | RA(P) |
3 |
| Weathering Resistance (S) | W(S) |
3 |
| Acid Resistance (S) | SR |
4.1 |
| Phosphate Resistance | PR |
1.0 |
| P = Powder Group, S = Surface Group | ||
Other Properties |
|||
| Bubble Quality Group | B |
||
| Specific Gravity | d |
4.72 |
|
| Coloring |  |
385 |
|
 |
315 |
||
Relative Partial Dispersions |
|
 |
0.7787 |
 |
0.3371 |
 |
0.3003 |
 |
0.5383 |
 |
1.2570 |
 |
0.5573 |
 |
0.4694 |
 |
1.2844 |
 |
0.8176 |
 |
0.4857 |
 |
0.5143 |
 |
1.7651 |
Internal Transmittance |
||
 |
 |
 |
280 |
||
290 |
||
300 |
||
310 |
||
320 |
0.110 |
|
330 |
0.370 |
|
340 |
0.600 |
|
350 |
0.750 |
|
360 |
0.850 |
|
365 |
||
370 |
0.906 |
|
380 |
0.939 |
|
390 |
0.959 |
|
400 |
0.970 |
|
420 |
0.981 |
|
440 |
0.986 |
|
460 |
0.990 |
|
480 |
0.993 |
|
500 |
0.996 |
|
550 |
0.998 |
|
600 |
0.998 |
|
650 |
0.998 |
|
700 |
0.999 |
|
800 |
0.999 |
|
900 |
0.999 |
|
1000 |
0.999 |
|
1200 |
0.999 |
|
1400 |
0.997 |
|
1600 |
0.996 |
|
1800 |
0.989 |
|
2000 |
0.967 |
|
2200 |
0.910 |
|
2400 |
0.680 |
|
Temperature Coefficients of Refractive Index |
||||||||
Range of Temperature (°C) |
dn / dt relative  |
|||||||
t |
C' |
He-Ne |
D |
e |
F' |
g |
i |
|
| -40 ~ -20 | 3.6 |
4.1 |
4.2 |
4.4 |
4.6 |
5.2 |
5.7 |
|
| -20 ~ 0 | 3.7 |
4.3 |
4.4 |
4.6 |
4.8 |
5.4 |
6.0 |
|
| 0 ~ 20 | 3.8 |
4.4 |
4.5 |
4.7 |
4.9 |
5.5 |
6.1 |
|
| 20 ~ 40 | 3.8 |
4.5 |
4.5 |
4.7 |
5.0 |
5.6 |
6.2 |
|
| 40 ~ 60 | 3.8 |
4.5 |
4.6 |
4.8 |
5.1 |
5.7 |
6.4 |
|
| 60 ~ 80 | 3.9 |
4.7 |
4.7 |
5.0 |
5.3 |
5.9 |
6.6 |
|