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  : ACHROMATIC WAVEPLATES (AWP)
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  • Constant Retardation over broad spectral ranges
  • ¼ and ½ wave retardation.
  • Three standard ranges
    465 - 610 nm,
    700 - 1000 nm,
    1200 – 1650 nm
  • Clear Aperture of 11.5mm
  • Air spaced construction
  • Mounted
  • AR Broadband Coated

Product Description

An Achromatic Waveplate, AWP, is similar to a Zero-Order Waveplate, which is made from two pieces of Crystal Quartz except that the AWP is composed of one piece of Crystal Quartz and one piece of Magnesium Fluoride, MgF2. Both of these materials are birefringent, however, by proper matching of the birefringent changes in one material with those of the second, retardation changes are minimized as the wavelength changes. This phenomenon produces a Waveplate whose change in retardation is extremely small for large variations in wavelength.

For tunable sources or lasers with large spectral widths, you will want an AWP - one whose performance is nearly independent of wavelength.

Our AWPs are designed to effectively eliminate the wavelength dependence over a wide spectral range, typically several hundred nanometers. The AWPs are available for three wavelength ranges: VIS (465-610nm), NIR (700-1000nm) and IR (1200-1650nm). These AWPs operate beyond these ranges however; although the retardation change exceeds the specification. The standard versions are air-spaced. Custom assemblies, including cemented versions, are available to meet your specific requirements. Send us your drawing for a quote on a custom AWP.

Specifications

Material: Crystal Quartz & MgF2

Wavelength Ranges: 465 – 610nm, 700 – 1000nm, 1200 – 1650 nm
Retardance:/4 and /2
Retardation Tolerance: /100 over wavelength range
Clear Aperture: 11.5mm
Temp Coefficient of Retardation:
</500 per °C
Transmitted Wavefront Distortion:
/4@633nm
Surface Quality: 20/10 scratch dig
Beam Deviation: < 1 arc min
Parallelism: <1 arc min
AOI range for < 1% change in Retardance: +/-3°
Optical Axis: Marked on the mounting ring
Temperature Storage range: -40°C to +75°C
Damage Threshold: 2J/cm2 (8ns pulse @ 1064nm); 500KW/cm2, CW
Diameter Mounted: 25.4mm
Thickness: 8mm (mounting ring) 8 +/- 0.15
Coating: Ravg<1% at 465-610nm per surface
Ravg<0.6% at 700-1000nm per surface
Ravg<0.5% at 1200-1650nm per surface
Style: Cemented or special order


Pricing and ordering info

AO12A-¼-X, or, AO12A-½-X

$695.00

X = 1 for 465-610nm,
X = 2 for 700-1000nm,
X = 3 for 1200-1650nm

Contact factory for quantity pricing


Custom AWPs available.

Achromatic Waveplate diagram, achromatic waveplate, acromatic waveplate, zerorder waveplate, retarders, retardation plates, prisms, lenses.
  • Constant Retardation
  • 23mm Clear Aperture
  • Visible, Near IR and IR
  • Unmounted or Mounted
  • AR Broadband Coated
  • Cemented Construction

Product Description

This is the second series of Achromatic Waveplates, AWPs, from Tower Optical Corp. This series is built upon 25.4mm substrates of Crystal Quartz and Magnesium Fluoride. These substrates are cemented together. This technique helps to control costs by reducing the number of surfaces requiring AR coating while increasing the physical size, thus accommodating larger beam diameters. As with the original series of AWPs these AWPs are available in the following ranges:

VIS 465 to 610nm, NIR 700 to 1000nm, IR 1200 to 1650nm

Each is broadband AR coated for its respective range.The performance is shown graphically on the curves below.

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Specifications

Material: Crystal Quartz & MgF2

Wavelength Ranges: 465 – 610nm, 700 – 1000nm, 1200 – 1650 nm
Retardance:/4 and /2
Retardation Tolerance: /100 over wavelength range
Clear Aperture: 23mm
Temp Coefficient of Retardation: </500 per °C
Transmitted Wavefront Distortion: /4@633nm
Surface Quality: 20/10 scratch dig
Beam Deviation: < 1 arc min
Parallelism: <1 arc min
AOI range for < 1% change in Retardance: +/-3°
Optical Axis: Marked on the mounting ring
Temperature Storage range: -40°C to +75°C
Damage Threshold: 2J/cm2 (8ns pulse @ 1064nm); 500KW/cm2, CW
Diameter Mounted: 30mm
Thickness: 6mm (mounting ring) 6 +/- 0.15
Coating: Ravg<1% at 465-610nm per surface
Ravg<0.6% at 700-1000nm per surface
Ravg<0.5% at 1200-1650nm per surface
Style: Cemented


Pricing and ordering info

AO23B-R-W, 25.4mm AWP mounted in 30mm ring
AO25.4B-R-W, 25.4mm AWP without mounting ring
R=½ or ¼ retardation

W=Wavelength:
1 = 465-610nm,
2 = 700-1000nm,
3 = 1200-1650nm

AO23B-R-W $795.00

AO25.4B-R-W

$770.00

 

 
   
 

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