What is Achromatic waveplate?
Achromatic waveplate is similar to zero order waveplate except that the two plates are made from different birefringent crystals. Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range.
Epoxy Cemented or Air Spaced available
Very Broad Bandwidth
Custom size available
RoHS Compliant
Specifications:
Material | Birefringent crystals and MgF2 |
Dimension Tolerance | +0.0/-0.2mm |
Wavefront Distortion | < λ/4 @632.8nm (for air spaced type) or λ/ 8@633nm |
Retardation Tolerance | λ/100 or λ/200 |
Parallelism | <10 arc second (for cemented type) |
Surface Quality | 40/20 or 20/10 Scratch and Dig |
Clear Aperture | >90% central area |
Standard Wave | quarter-wave (v/4), half-wave (λ/2) |
Standard Wavelength | 450-650nm, 550-750nm, 650-1100nm, 900-2100nm |
Coating | Uncoated for standard, AR coating available |
Other sizes, wavelength are available upon request. |
Type | λ/2 Part No. | λ/4 Part No. | Diameter(mm) |
Cemented | CHAWP210 | CHAWP410 | 10.0 |
CHAWP215 | CHAWP415 | 15.0 | |
CHAWP225 | CHAWP425 | 25.4 | |
Air Spaced | CHAWP2210 | CHAWP4410 | 10.0 |
CHAWP2215 | CHAWP4415 | 15.0 | |
CHAWP2225 | CHAWP4425 | 25.4 |
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