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In addition to 1” diameter half-wave and quarter-wave retardation plates, PPC also stocks 4” diameter compound zero order waveplate wafers. These large retarders can be sold as-is, core-drilled or diced to almost any size or shape in just a day or two, and they are already coated with our high energy, low loss ion beam sputtered (IBS) anti-reflection coatings.
PPC uses laser-grade crystal quartz to produce multiple-order,
true zero-order and compound zero-order waveplates with retardations
of quarter-wave, half-wave or anything in-between.
Multiple-order retarders are ideal for narrow- or single-wavelength
applications at a specific operating temperature. For increased
bandwidth and thermal stability, zero-order waveplates
are recommended.
For compound zero-order waveplates and multi-element waveplate
assemblies, we use durable IBS coatings and our proprietary
epoxy-free bonding technology—Chemically Activated Direct
Bonding™ (CADB). This unique combination of processes results in
precise, high-energy components that exhibit environmental stability
and improved transmitted wavefront characteristics.
Waveplates are available as standalone components, or as part of
a more complex optical assembly. PPC manufactures custom crystal quartz and sapphire waveplates and multi-element polarization assemblies from 1 mm to 1" for research, semi, biomedical and aerospace applications.
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Waveplates use a phenomenon known as birefringence to alter the incoming laser beam polarization state. The most common waveplate uses are for turning linearly polarized light into circularly polarized light (quarter-wave plates), and to rotate the polarization plane of a linearly polarized source (half-wave plates).
II-VI manufactures both multiple order and zero order waveplates. Zero order waveplates have the dual advantage of being less sensitive to changes in operating temperature and input wavelength.
Applications
* Converting linear to circular polarization
* Rotating the polarization plane
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An Achromatic Waveplate, AWP, is made one piece of Crystal Quartz and one piece of Magnesium Fluoride, MgF2. These materials are birefringent and by matching of the birefringent changes in one material with those of the second, retardation changes are minimized as the wavelength changes. This produces a waveplate whose change in retardation is small for large variations in wavelength.
The AWP’s are available for three wavelength ranges: VIS (465-610nm), NIR (700-1000nm) and IR (1200-1650nm).
Specifications
Substrate Material: Crystal Quartz & MgF2
Retardance: l/4 and l/2
Retardation Tolerance: l/100 over wavelength range
Clear Aperture: 11.5mm
Temp Coefficient of Retardation:
Wavelength ranges(nm): 465-610, 700-1000, 1200-1650
Transmitted Wavefront distortion: l/4@633nm
Surface Quality: 20/10 scratch dig
Parallelism: <1 arc min
AOI range for < 1% change in Retardance: +/-3°
Optical Axis: Marked on the mounting ring
Diameter Mounted: 25.4 mm
Thickness: 9mm
Coating: Ravg<1% at 465-610nm per surface
Ravg<0.6% at 700-1000nm per surface
Ravg<0.5% at 1200-1650nm per surface
Style: Airspaced
AO12A-¼-X, or, AO12A-½-X $695.00
X = 1 for 465-610nm,
X = 2 for 700-1000nm,
X = 3 for 1200-1650nm
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These retarder plates are made from quartz for 1/4 and 1/2 first order. The plates are suitable for low power and high power applications.
* Retarder Plates - Multiple Orders
* Retarder Plates - Zero Order
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