Waveplates
Waveplate is an opticin which the polished faces contain the optical axis.All light incidents normal to the surface are composed of components polarized paralle and peerpendicular to the axis.In such a device,light polarized parallel to the axis will propagate slower than light polarized perpendicular to the axis.As the light propagates through the optic,the phase shift between the two components increases with thickness.The phase shift is called te retardance.The most popular retarders are quarter and half wave.
With an appropriate choice of thickness,any degree of retardance may be achieved at any wavelength for which quartz is transparent.However,the minimum thickness necessary to achieve a mechanically strong part corresponds to several full waves of retardance.|
|
|
|
The thickness of the quarter waveplate is such that the phase difference is 1/4 wavelength ( l /4, Zero order) or certain multiple of 1/4-wavelength [(2n+1) l /4, multiple order].
we provides standard waveplate wavelengths (nm) listed as below:
|
355 |
532 |
632.8 |
808 |
850 |
980 |
1064 |
1310 |
1480 |
1550 |
1590 |
Note: Other wavelengths within the ranger of 200-2300nm are also available upon request.
Standard Specifications:
Material: Crystal Quartz
Dimension tolerance: +0.0, -0.1mm
Wavefront distortion: < l /8@632.8
Retardation tolerance: < l /500
Wavelength range: 240-2100 nm
Parallelism: <1 arc second
Surface quality: 20/10 scratches and dig
Clear aperture: >90%
AR coating: R<0.2% at central wavelength
Standard Wave: quarter-wave ( l /4), half-wave ( l /2)
