WoG polarizer is composed of Wollaston polarizer and GlanTaylor polarizer.And it is currently patent pending.
WoG polarizer has high transmission, high laser damage threshold, and high extinction ratio performance in DUV region.
WoG polarizer is high laser resistant. Because it uses a high laser damage threshold material with air space structure.
For incident light, one of the polarization is totally reflected and only the other polarization pass through WoG polarizer.
For this reason, it has high extinction ratio.
In the case of Rochon prism and Wollaston prism, unnecessary polarized light is transmitted through to the front.
On the other hand, WoG polarizer will reflect the unnecessary polarization. So you can compact your optical system.
There are two kinds of WoG polarizer types, 4Prism and 3prism. The 4prism type is longer than the 3prism type, and light can incident bidirectionally on the both side of it. The 3prism type of incident direction is only given one.
Clear aperture and holder structure can be changed on request.Structure
| Part No. | WoG 193 4Pr | WoG 193 3Pr |
|---|---|---|
| Wavelength (nm) | 193.4 | 193.4 |
| Transmittance (%) | 88 (90 Typ.) | 88 (90 Typ.) |
| Extinction ratio (dB) | about 40 | about 40 |
| *Clear Aperture (mm) | φ8 | φ8 |
| **Holder dimensions (mm) | 18×18×28.5 | 18×18×21.5 |
| Angle of incidence (°) | ±2.5 | ±2.5 |
| surface Quality | S/D = 10/5 | S/D = 10/5 |
| Transmitted Wave front PV(λ) | 1/4 @ λ=633nm | 1/4 @ λ=633nm |
| Coating | Both sides AR-coated R≦0.5% A≦1.0% |
Both sides AR-coated R≦0.5% A≦1.0% |
| Bidirectional | ◯ | ╳ |
* * Holder structure can be changed depending on request
Schematic Diagrams of WoG Polarizers
Transmission characteristics of WoG Polarizers 4Pr Type
Transmission characteristics of WoG Polarizers 3Pr Type
Laser induced damage threshold
WoG polarizer is high laser resistant. Because it uses a high laser damage threshold material with air space structure.
Evaluation data of AR coating on the material of the WoG polarizer| *Laser induced damage threshold (J/cm2) |
17.1 |
* Irradiation conditions λ=193nm, 10ns pulse
