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| Low-order
| Cenmented
Zero-order | True-Zero
Order | Achromatic
| Dual-wavelength
| Rotator |
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Achromatic
Waveplate (Broadband waveplate)
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| |
Achromatic
waveplate is similar to Zero-order waveplate except
that the two plates are made from different materials, such
as crystal quartz and magnesium fluoride. Since the dispersion
of the
birefringence can be different for the two materials, it
is possible
to specify the retardation values at a broadband wavelength
range. Hence, the retardation of the resulting waveplate
can be made to low sensitivity to wavelength change. |
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Specifications:
Material: Crystal Quartz and Crystal MgF2
Dimension Tolerance: +0.0, -0.2 mm
Thickness: around 2mm
Wavefront Distortion: L/4 @ 632.8 nm
Retardation Tolerance: up to L/100 at specified wavelength
Wavelength Range:
VIS: 450nm-620nm
NIR: 700nm-1000nm
IR: 1200nm-1650nm
Customer specified wavelength in 400~2100nm
Parallelism: up to 10 arc second
Surface Quality: 20-10 scratch and dig
BBAR coating Ravg<0.5%
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| Air-spaced
achromatic waveplate is also available upon request. |
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| Retardation
curve samples: |
Half waveplate @ 465-650nm |
Half waveplate @700-1000nm |
Half waveplate @ 1200-1650nm |
