
Polarizer
Thin Film / Cube / Broadband
Thin Film Polarizer TFP
Normally is coated on a plate (that does not need to have any birefringence) and uses the strong reflection difference between p- and s-polarized light. Working with the Brewster angle a high extinction ratio can be achieved and no AR on the rear surface is required (see tips and tricks).
Cube Polarizer CP
Is built out of two 45° prisms with a polarizing coating on one of the hypotenuses. The prisms are cemented or optically contacted after coating, some with an air gap. The output surfaces need an AR at 0°.




- TFP
- CP
- BBPOL



λ [nm] | AOI | method | |
---|---|---|---|
157 | Rp < 0.3%, Rs > 87% | 72° on CaF2 | EBE |
193 | Tp > 80%, Ts < 10% | 73° | EBE |
248 | Tp > 80%, Ts < 2% | Brewster | EBE |
266 | Tp > 90%, Ts < 2% | Brewster | EBE |
355 | Tp > 94%, Ts < 2% | Brewster | EBE |
Tp > 96%, Ts < 0.2% | Brewster | IBS | |
532 | Tp > 96%, Ts < 1% | Brewster | IAD |
Tp > 99%, Ts < 0.1% | Brewster | IBS | |
808 | Tp > 95%, Ts < 1% | Brewster | EBE |
940 | Tp > 95%, Ts < 1% | Brewster | IAD |
1064 | Tp > 95%, Ts < 5% | 45° cube | EBE |
Tp > 99%, Ts < 1% | 45° | IBS | |
Tp > 95%, Ts < 2% | Brewster | EBE | |
Tp > 99%, Ts < 0.1% | Brewster | IBS | |
1342 | Tp > 96%, Ts < 1% | Brewster | IAD |
1550 | Tp > 98%, Ts < 1% | 45° | IBS |
2100 | Tp > 95%, Ts < 0.5% | Brewster | IAD |
λ [nm] | extinction ratio | AOI | method |
---|---|---|---|
1064 | Tp/Ts > 990 | Brewster | IBS |
Rs/Rp > 200 | |||
Tp/Ts > 48 | Brewster | EBE | |
Rs/Rp > 20 |
The extinction ratio can be optimized for use in reflection or transmission. The given values refer to the standard TFP made by IBS and the much cheaper EBE. Also other splitting ratios, e.g. Tp/Rs can be optimized.
All values are given for standard coatings. Customized coatings available for all types.
Coating methods available:





Examples
If not mentioned otherwise, all values and diagrams are given
... for the standard substrate material used in the described wavelength area (mostly Fused Silica or CaF2).
... without consideration of the rear surface.
... with EBE coating technique for a good cost-performance ratio.
Customized coatings are available for all types.
–––– dashed lines show the zoomed curve with the stated magnification

750-850 nm: 72°: Tp,avg > 97%, Rs > 75%;
70-74°: Tp,avg > 95%, Rs > 75%

515-532 nm + 1030-1064 nm: Ts < 0.2%, Tp,avg > 98%
(IBS-coating)
Every coating type can be optimized
for every
• substrate material
• wavelength
• reflection/transmis-
sion value
• angle of incidence
• polarization
• GDD value
• ...
Alternatively we can create
a totally new design for you.