Wedge Depolarizer QWD3225
Linear polarization is undesirable in some optical systems. In reflective spectrometers, for example, polarization affects detector sensitivity. Depolarizers convert polarized light to unpolarized light and are widely used in polarization-sensitive systems and instruments. Youguang Technology's wedge depolarizer uses two crystalline-quartz wedges. Unlike ordinary designs, it uses crystalline quartz rather than fused silica for optical-path polarization compensation. Conventional wedge depolarizers are restricted to narrow spectral ranges by beam-deviation limits. Wuhan Youguang Technology's design covers a broad spectral range while keeping deviation acceptable. When linearly polarized light reaches the wedge surface, its polarization varies spatially to produce random polarization. The device effectively depolarizes both monochromatic and broadband sources. Best results occur with the incident linear polarization at 45 degrees to the optical axis. Larger spots improve depolarization. Best performance at 45 degrees. Suitable for broadband sources and spot diameters greater than 6 millimeters.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | Quartz Crystal |
| Type | Cemented |
| Dimensions | 25.4 mm |
| Dimensional Tolerance | +0/-0.2 |
| Dimensional Tolerance | +0/-0.2mm |
| Thickness | 5 mm |
| Thickness Tolerance | ±0.2 mm |
| Thickness Tolerance | ±0.2mm |
| Surface Quality | 60/40 |
| Clear Aperture Dimension | >90% |
| Surface Figure | λ/8@632.8nm |
| Surface Figure | <λ/8@632.8nm |
| Parallelism | 1minutes |
| Parallelism | <1minutes |
| Beam Deviation | 3minutes |
| Beam Deviation | <3minutes |
| Design Wavelength | 400-2500 nm |
| Phase Retardance Variation | 0.5λ/mm@1064nm |
| Damage Threshold | >500mJ/cm2, 20ns, 20Hz @1064nm |
| Damage Threshold | Cemented: >500mJ/cm^2, 20ns, 20Hz@1064nm; Optically Contacted: >5J/cm^2, 20ns, 20Hz@1064nm |
| Coating | Standard Products Are Uncoated; Coating Available on Request |
Datasheet
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