| BK7 |
|
| Thermal expansion |
7.1x10-6/℃ at -30-70℃ |
| Thermal conductivity |
1.14w/m/℃ at 25℃ |
| Specific
heat |
0.858J/g℃ at 25℃ |
| Density |
2.51g/cm3 |
| Knoop hardness |
520kg/mm2 |
| Abbe constant |
64.17 |
| dn/dT |
1.2x10-6/℃ at 1064nm,
20-40℃ |
| Refractive
index |
see table. |
|
| l(nm) |
n |
| 365.0 |
1.53626 |
| 486.1 |
1.52238 |
| 546.1 |
1.51872 |
| 589.3 |
1.51673 |
| 632.8 |
1.51509 |
| 852.1 |
1.50981 |
| 1060.0 |
1.50669 |
| 1529.6 |
1.50094 |
|
| UV Fused silica |
|
| Thermal expansion |
0.52x10-6/℃ at 5-35℃ |
| Thermal conductivity |
1.38w/m/℃ at 25℃ |
| Specific
heat |
0.741J/g℃ at 25℃ |
| Density |
2.202g/cm3 |
| Knoop hardness |
560kg/mm2 |
| Abbe constant |
67.8 |
| dn/dT |
11x10-6/℃ at 1064nm,
20-40℃ |
| Refractive
index |
see table. |
|
|
l(nm) |
n |
|
185.0 |
1.57485 |
|
260.0 |
1.50239 |
|
355.0 |
1.47607 |
|
532.0 |
1.46071 |
|
632.0 |
1.45702 |
|
800.0 |
1.45332 |
|
1064.0 |
1.44963 |
|
1500.0 |
1.44460 |
|
| Crystals Quartz |
|
| Thermal expansion |
7.79x10-6/℃, ∥C, at 0-80℃
13.37x10-6/℃, ⊥C, at 0-80℃ |
| Thermal conductivity |
10.7w/m/℃, ∥C, at 25℃
10.7w/m/℃, ⊥C, at 25 |
| Specific
heat |
0.787J/g℃ at 25℃ |
| Density |
2.648g/cm3 |
| Knoop hardness |
741kg/mm2 |
| dn/dT |
-0.65x10-5/℃, E∥C, at 640nm
-0.55x10-5/℃, E ⊥C, at 640n |
| Refractive
index |
see table. |
|
|
l(nm) |
no |
ne |
|
193.6 |
1.65999 |
1.67343 |
|
263.2 |
1.59309 |
1.60389 |
|
358.7 |
1.56391 |
1.57370 |
|
546.1 |
1.54617 |
1.55535 |
|
706.5 |
1.54048 |
1.54972 |
|
1083.0 |
1.53387 |
1.54260 |
|
| Sapphire |
|
| Crystal
structure |
Hexagonal |
| Lattice
parameters |
a=4.759Å, c=12.989Å |
| Thermal
expansion |
5.6x10-6/℃ |
| Thermal conductivity |
25.12w/m/℃ |
| Specific
heat |
0.418J/g℃ at 25℃ |
| Melting
point |
2042℃ |
| Density |
3.98g/cm3 |
| Mohs hardness |
9 |
| Transparence |
0.15—5.5mm |
| dn/dT |
13x10-6/℃ |
| Refractive
index |
see table. |
|
|
l(nm) |
n |
|
365.2 |
1.83360 |
|
354.3 |
1.79600 |
|
404.7 |
1.78582 |
|
546.1 |
1.77078 |
|
579.1 | |
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