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Photonics West
27.01.- 01.02.2018
Visit us at
Photonics West in San Francisco
Booth 4529


Lyot Depolarizer

Lyot Depolarizer

The depolarizers consists of two birefringent plane parallel plates. The thickness ratio of the plates is 2:1 and the crystal axes enclose an angle of 45°. The depolarization is achieved be the superposition of circular, elliptical and linear polarization of light at different wavelengths. For this reason a minimum spectral width of the incident light is required in order to achieve a sufficient depolarization. Lyot depolarizers are not suited for monochromatic light.

The prisms can be ordered unmounted or with a mounting ring. The unmounted depolarizers have an octagonal cross section. The surfaces are not antireflection coated by default.

We offer Lyot depolarizers either made of synthetic quartz crystal or made of calcite. The version made of quartz is suited for most broadband light sources. Depolarizers made of calcite can be used for sources with a narrower spectral width owing to the larger birefringence of this crystal.

Optical specifications

material quartz calcite
spectral range 180-2800 nm 350-2200 nm
total thickness 6 mm (4mm + 2 mm) 6 mm (4mm + 2 mm)
wavefront distortion <λ/5 <λ/5
min. spectral width 30·1012 Hz 2·1012 Hz
prismatic deviation <2'' <1'
connection of the plates optical contact (no cement) cemented

Standard dimensions

format
15 mm 20 mm 25 mm
Art.-Nr. quartzmount
PDL 18.15 PDL 18.20 PDL 18.25
Art.-Nr. quartzunmount
PDL 18.15.0 PDL 18.20.0 PDL 18.25.0
Art.-Nr. calcite mount
PDL 21.15 PDL 21.20 PDL 21.25
Art.-Nr. calcite unmount
PDL 21.15.0 PDL 21.20.0 PDL 21.25.0
free aperture [mm] 14,5 19,5 24,5
mount diameter [mm] 25 30 40
mount length [mm] 10 15 15

Price mount version

Art.-No. 1 pieces in € 2-5 pieces in € 6-10 pieces in €
PDL 18.15 795,- 774,- 758,-
PDL 18.20 915,- 890,- 872,-
PDL 18.25 1278,- 1242,- 1218,-

Price unmount version

Art.-No. 1 pieces in € 2-5 pieces in € 6-10 pieces in €
PDL 18.15.0 707,- 685,- 670,-
PDL 18.20.0 826,- 800,- 784,-
PDL 18.25.0 1190,- 1154,- 1130,-

Price mount version

Art.-No. 1 pieces in € 2-5 pieces in € 6-10 pieces in €
PDL 21.15 1617,- 1531,- 1473,-
PDL 21.20 1891,- 1790,- 1722,-
PDL 21.25 2605,- 2466,- 2371,-

Price unmount version

Art.-No. 1 pieces in € 2-5 pieces in € 6-10 pieces in €
PDL 21.15.0 1527,- 1442,- 1383,-
PDL 21.20.0 1801,- 1702,- 1633,-
PDL 21.25.0 2516,- 2376,- 2282,-