Half wave retardation at Wavelength 1
These dual wavelength multiple order waveplates are made a piece of quartz which has been precisely polished. Its thickness is controlled to provide half wave retardation at one wavelength and full wave retardation at a second wavelength. They are offered for Nd:YAG harmonic wavelengths and can be used to separate the harmonic beams by means of a change in their state of polarization. A half wave plate has a net retardation of pi and rotates the plane of polarization by 90deg. A full wave plate has a net retardation of 2 pi and rotates the plane of polarization by 180deg. The two harmonics will therefore emerge with crossed linear polarizations. Optionally, these waveplates may be supplied mounted in a metal ring.
| Material: | Crystal Quartz |
| Surface Quality | <10 / 5 |
| Transmitted Wavefront: | < λ / 10 @ 633 nm |
| Diameter: | < 25.4=0.00 / – 0.20 mm |
| Thickness: | t = approximately 1.0 mm |
| Polarization state purity: | 98% |
| Retardation @ λ1: | λ / 2 |
| Retardation @ λ2: | λ |
| Parallelism: | <1.0 arc sec |
| Clear Aperture: | 20.0 mm |
| Mount OD: | 38.1 mm |
| AR Coating | R < 0.25% per surface |
Multi Order Waveplates – Dual Wavelength
| Product Type | Dual Wavelength Multiple Order Waveplate, Dual Wavelength Multiple Order Mounted Waveplate |
|---|---|
| Mount Dimension | NONE, 38.1 |
| Diameter | 1.0" dia |
| Material | Crystal Quartz |
| Retardation | ½ |
| Wavelength 1 | 266 nm, 355 nm, 532 nm, 1064 nm |
| Wavelength 2 | 355 nm, 532 nm, 1064 nm |
Wedge Windows (WW) 
