T-PS851 - N-SF11 Equilateral Dispersive Prism, 10 mm
N-SF11 is a flint glass that offers excellent performance in the visible and NIR spectral range. It offers a high refractive index and low Abbe number, making it excellent for use in an equilateral dispersive prism.
Polarization Effects
For P-Polarized light (blue line) incident on a dispersing prism at the angle of least deviation, the graph to the right shows that only a small percentage of the P-polarized light is reflected at the surface. Thus, for this polarization, the transmission through a prism fabricated from N-SF11, a RoHS-compliant version of SF11, will be excellent even though there is no AR coating on the surface.
| Material |
Wavelength Range |
Index of Refraction |
Abbe Number |
| F2 |
385 nm - 2 µm |
1.617 @ 633 nm |
36.37 |
| N-F2 |
420 nm - 2 µm |
1.617 @ 633 nm |
36.43 |
| N-SF11 |
420 nm - 2.3 µm |
1.779 @ 633 nm |
25.76 |
| CaF2 |
180 nm - 8 µm |
1.433 @ 633 nm |
95.00 |
| ZnSe |
600 nm - 16 µm |
2.403 @ 10.6 µm |
N/A |
| Item # |
A=B=C=H
(mm) |
Material |
Minimum Angle
of Deviation |
V |
Surface Flatness
@ 633 nm |
| T-PS850 |
10 ± 0.15 |
F2 |
47.9° @ 633 nm |
36.37 |
λ/10 |
| T-PS852 |
25 ± 0.15 |
| T-PS856 |
15 ± 0.15 |
N-F2 |
47.9° @ 633 nm |
36.43 |
λ/10 |
| T-PS858 |
20 ± 0.15 |
| T-PS854 |
50 ± 0.15 |
| T-PS851 |
10 ± 0.15 |
N-SF11 |
65.6° @ 633 nm |
25.76 |
λ/10 |
