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Laser World of Photonics
26.04.- 29.04.2022
Visit us at
Laser World of Photonics
in Munich
Booth B6.201


Hanle Wedge Depolarizers

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