Low-level waveplates are machined from a single piece
of quartz crystal, producing phase delays of several orders to the design
wavelength. The thickness is generally around 0.3mm, the wavelength bandwidth
is narrow, and the temperature stability and field of view are not as good as
zero-order waveplates. It can be used in light source systems with good
monochromaticity.
|
Material |
Quartz |
|
Transmission Wavefront |
λ/8@633nm |
|
Dimensional Tolerance |
+0.0,-0.1 |
|
Delay Tolerance |
λ/60-λ/150(λ<400nm) λ/150-λ/350(400nm<λ<700nm) λ/350-λ/600(λ＞700nm) |
|
Parallelism |
<1 arc second |
|
Smoothness |
20/10 Scratch /Dig |
|
Clear Aperture |
Central 90% |
|
AR Coating |
<0.2% at
Wavelength |
|
Holder |
Refer to Holders for
Waveplate |
|
Material |
Quartz |
|
Transmission Wavefront |
λ/8@633nm |
|
Dimensional Tolerance |
+0.0,-0.1 |
|
Delay Tolerance |
λ/60-λ/150(λ<400nm) λ/150-λ/350(400nm<λ<700nm) λ/350-λ/600(λ＞700nm) |
|
Parallelism |
<1 arc second |
|
Smoothness |
20/10 Scratch /Dig |
|
Clear Aperture |
Central 90% |
|
AR Coating |
<0.2% at
Wavelength |
|
Holder |
Refer to Holders for
Waveplate |
