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Waveplate
Waveplates (retardation plates or phase shifters) are made from materials which exhibit birefringence. The velocities of the extraordinary and ordinary rays through the birefringent material vary in..
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Waveplates (retardation plates or phase shifters) are made from materials which exhibit birefringence. The velocities of the extraordinary and ordinary rays through the birefringent material vary inversely with their refractive indices. This difference in velocities gives rise to a phase difference when the two beams recombine. In the case of an incident linearly polarized beam this is given by α=2πd(ne-no)/λ, where is α phase difference; d is thickness of waveplate; ne, no are refractive indices of extraordinary and ordinary rays respectively; λ is wavelength. At any specific wavelength the phase difference is governed by the thickness of the retarder.
Half Waveplate can rotate linearly polarized light by an Angle twice as large as the Angle between the opposite polarization of the incident light and the optical axis. When combined with a polarizing cube beamsplitters, it is often used in beam converters where the polarization state needs to be converted.
Quarter waveplate can delay the linearly polarized light by 1/4 wavelength, so that the linearly polarized light can be converted into circular polarized light. Conversely, they can also convert circularly polarized light into linearly polarized light. Combined with a polarizing cube beamsplitters.

 

 

 

 

True Zero Order Waveplate 

 
  • λ/4 and λ/2, Retardance Tolerance: λ/300
  • UV to NIR Design Wavelengths Available
  • True Zero Order Waveplates Also Available
  • High damage threshold up to 10 J/cm2 @ 1064nm
 
Specification
Substrate Material:
Quartz Crystal
Dimension:
0.5×0.5mm~φ50.8mm
Parallelism:
＜3arcsec
Surface Quality:
20-10
Surface Flatness (P-V):
λ/8@ 632.8nm
Retardation:  
λ/2, λ/4, λ/8
Retardation Tolerance:
λ/300
Wavelength Range:
R<0.2%@ UV,VIS,NIR
Damage Threshold:
10J/cm2 @ 1064nm, 10ns, 10Hz
 
 

Optically Contacted Zero-Order Waveplate

  • Optically Contacted
  • Thickness 1.5~2mm
  • Double Retardation Plates
  • Broad Spectral Bandwidth
  • Wide Temp. bandwidth 
Specification
Substrate Material:
Quartz Crystal
Dimension:
2×2mm~φ50.8mm
Parallelism:
＜3arcsec
Surface Quality:
20-10
Surface Flatness (P-V):
λ/8@ 632.8nm
Retardation:  
λ/2, λ/4, λ/8
Retardation Tolerance:
λ/300
Wavelength Range:
R<0.2%@λc±30nm
Damage Threshold:
5J/cm2 @ 1064nm, 10ns, 10Hz
 
 

Air Spaced Zero-Order Waveplate

  • Double Retardation Plates
  • AR Coated,R<0.2% and Mounted
  • High Damage Threshold
  • Better Temperature Bandwidth
  • Wide Wavelength Bandwidth
Specification
Substrate Material:
Quartz Crystal
Dimension:
Φ12.7mm ~φ50.8mm
Parallelism:
＜3arcsec
Surface Quality:
20-10
Surface Flatness (P-V):
λ/8@ 632.8nm
Retardation:  
λ/2, λ/4, λ/8
Retardation Tolerance:
λ/300
Wavelength Range:
R<0.2%@λc±30nm
Damage Threshold:
10J/cm2 @ 1064nm, 10ns, 10Hz
 

Achromatic Waveplate

  • Extremely broad wavelength ranges
  •  High damage threshold for Air-spaced Achromatic Zero-Order waveplate
  •  Low sensitivity within the designed wavelength
  • Retardation tolerance up to λ /50 over the wavelength range
 
Specification
Substrate Material:
Quartz Crystal+ MgF2
Dimension:
Φ12.7mm ~φ25.4mm
Parallelism:
＜3arcsec
Surface Quality:
20-10
Surface Flatness (P-V):
λ/8@ 632.8nm
Retardation:  
λ/2, λ/4, λ/8
Retardation Tolerance:
λ/50
Wavelength Range:
AR@ 400-600,500-700,700-900,900-1100nm
Damage Threshold:
0.2J/cm2 @ 1064nm, 10ns, 10Hz