Hanle Wedge Depolarizers
The depolarizer consists of two wedges joined by optical contact. One of the wedges is made from birefringent crystalline quartz and generates a variation of the output polarization over the varying thickness of the wedge. The other is made from non-birefringent fused silica and compensates for the prismatic deviation. When illuminated with a spatially expanded beam the output polarization varies over the beam diameter and on average the light appears unpolarized. Since the birefringent wedge introduced a polarization dependent double refraction the light is split in two slightly divergent polarized beams at the output. The full divergence angle is about 4'.
To achieve best result the beam diameter should be larger than 5 mm. Furthermore, the wedge must be oriented at 45° with respect to the polarization of the input beam. It is advisable to optimize this orientation by minimizing the residual polarization in the setup.
We can provide the prisms either unmounted or set into a rotation mount. The holder is equipped with a mounting pin for integration. By default, the prisms are not antireflection coated.
Optical specifications
material | synthetic quartz / fused silica |
spectral range | 180-2200 nm |
recommended beam diameter | >5 mm |
wavefront distortion | <l/10 |
angular separation | 4’ |
connection of the prisms | optical contact (no cement) |
Standard dimensions
format | |
10 mm | 15 mm | 20 mm | 25 mm |
Article-No. mount: | PDH 10 | PDH 15 | PDH 20 | PDH 25 | |
Article-No. unmount: | PDH 10.0 | PDH 15.0 | PDH 20.0 | PDH 25.0 | |
free aperture | [mm] | 9 | 14 | 19 | 24 |
center thickness | [mm] | 6 | 6 | 8 | 8 |
mount diameter | [mm] | 30 | 30 | 36 | 38 |
mount length | [mm] | 21 | 21 | 24 | 24 |
Price mount version
order no. | 1 piece in € | 2-5 piece in € | 6-10 piece in € |
---|---|---|---|
PDH 10 | 580.- | 525.- | 463.- |
PDH 15 | 788.- | 724.- | 650.- |
order no. | 1 piece in € | 2 piece in € | 3-5 piece in € |
PDH 20 | 1066.- | 968.- | 903.- |
PDH 25 | 1209.- | 1098.- | 1024.- |
Price unmount version
order no. | 1 piece in € | 2-5 piece in € | 6-10 piece in € |
---|---|---|---|
PDH 10.0 | 499.- | 452.- | 399.- |
PDH 15.0 | 705.- | 647.- | 581.- |
order no. | 1 piece in € | 2 piece in € | 3-5 piece in € |
PDH 20.0 | 977.- | 887.- | 827.- |
PDH 25.0 | 1098.- | 997.- | 930.- |
Price custom version
version made from MgF2 suited for the range 125-7000 nm | on request |
antireflection coating | on request |