Equilateral
Dispersing Prisms |
| |
| Equilateral prisms are used
as dispersing elements in instruments and experiments requiring
wavelength separation. They provide better brightness than diffraction
gratings. They also have greater power handling capabilities and
avoid possible confusion when trying to interpret overlapping spectral
orders. |
|
Specifications |
Material
and Wavelength Range |
BK7 |
330-2100
nm |
F2 |
350-2200 nm |
Fused Silica |
200-2500 nm |
SF10 |
400-2400 nm |
Refractive
Index |
BK7 |
nd=1.517 nF-nC=0.0081
|
F2 |
nd=1.728 nF-nC=0.0256
|
Angular Dispersion |
BK7 |
0042'37" |
F2 |
1040'45" |
SF10 |
0034'01" |
Fused Silica |
nd=1.458 nF-nC=0.0068
|
Dimensions |
0.5mm |
Angles |
0.5 arc min |
Surface Quality |
80-50 |
Flatness |
2per 25mm |
uncoated |
|
|
Right Angle Prisms