Variable Beamsplitter / VBS
With a variable beamsplitter, the incident angle of a laser can be changed.
The (R:T) ratios can also be modified. This is commonly used to adjust the light intensity of the laser without a variable adjustment of the light intensity or the laser to be stabilized.
Light Path Corrector (WSQNA/WBNA) are also available to compensate for beam shifts caused by variable beam splitters.
Common Specifications
| Material | BK7 Synthetic fused silica |  |
|---|---|---|
| Surface Flatness | λ | |
| Coating | Front surface: Dielectric multilayer coating Rear surfaces: Multi-layer anti-reflection coating |
|
| Surface Quality (Scratch-Dig) | 10-5 | |
| Clear Aperture | Circle that inscribed in a square of 90% of the dimensions | |
| Effective Beam Incident Diameter | Ellipsoidal 30×43mm (Angle of inclinaison) |
| Schematic | Outline Drawing |
|---|---|
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| Part Number | Wavelength Range | S-Polarization Transmittance (θ＝0°) |
S-Polarization Transmittance (θ＝45°) |
Material | Laser Damage Threshold* |
|---|---|---|---|---|---|
| VBS-50S03-1-266 | 266nm | ＞90% | ＜5% | Synthetic fused silica | 1Jcm2 |
| VBS-50S03-1-355 | 355nm | ＞93% | ＜5% | Synthetic fused silica | 1Jcm2 |
| VBS-50S03-1-532 | 532nm | ＞95% | ＜5% | BK7 | 2.5Jcm2 |
| VBS-50S03-1-1064 | 1064nm | ＞95% | ＜5% | BK7 | 3.5Jcm2 |
*Laser pulse width 10ns, repetition frequency 20Hz
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