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Achromatic Waveplate

An achromatic waveplate is a special desiged zero-order waveplate made of two or more matched birefringent crystals, such as Quartz and MgF2 crystal, where the retardation changes are minimized as the wavelength changes. These achromatic waveplates are used for tunable lasers, multiple laser-lines and other broad spectrum sources. Super-achromatic waveplate consists of three achromatic waveplates based on Pancharatnama's design is used for modulator in polarimeter.

Features of Achromatic waveplate

- Wide spectral bandwidth
- Low temperature sensitivity
- Large sizes available

Comparison of Achromatic waveplate and Zero-order waveplate

Achromatic waveplates are similar to zero order waveplates except that they are made of two or more different birefringent crystals, such as Quartz, MgF₂ or Sapphire crystals. All these crystals have their own birefringence and dispersion. By designing the appropriate thinkness, it is possible to specify the retardation values across a wide range of wavelengths.

Specifications of achromatic waveplate

Dimension Tolerance:

+0.0/-0.1mm

Parallelism:

<1 arc second

Surface Quality:

20-10

Wavefront Distortion:

λ/8@633nm

Retardation Variation:

<λ/100 wave

Clear Aperture:

90% central

Coating:

AR-coating R<0.5%

Damage Threshold:

>100 MW/cm² 1 ns 1064 nm

Mount:

Black anodized aluminum

Wavelength:

450-700nm, 700-1000nm, 950-1300nm, 1200-1650nm
Custom design wavelengths are available upon request.

OptoCity offer a variety of designed achromatic waveplate at competitive price. Standard achromatic waveplates are available in stock. Customized wavelengths can be provided according to requirements.

i. λ/4 Achromatic Waveplate

ii. λ/2 Achromatic Waveplate

Request Achromatic Waveplate for Quote

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