True Zero Order Λ/2 Half Wave Plate, Large Feild Angle, For Imaging Systems
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Overview:
Comparing with normal two plates design Zero order waveplates having a relatively larger thickness which reduces the field angle, the True zero order wave plates are made of a very thin plate or cemented with a BK7 substrate, which ensures the best possible field angle, temperature and wavelength performance. True zero order waveplate is widely used in laser Lab and optical instrument. True zero order waveplate is also an ideal case of optical waveplate for the applications where a large filed angle is necessary, such as imaging systems.
Main Features of True Zero Order Wave Plate:
- Large angle acceptance
- Low temperature sensitivity
- Wide spectral bandwidth
General Specifications of True Zero Order Waveplate:
| Material |
Crystalline Quartz + BK7 |
| Dimension Tolerance |
+0.0/-0.2mm |
| Surface Quality |
20/10 scratch and dig |
| Clear Aperture |
>90% central area |
| Wavefront Distortion |
<λ/8@632.8nm |
| Parallelism |
<1 arc seconds |
| Retardation Tolerance |
<λ/300 |
| Standard Wave |
half-wave(λ/2)
|
| Coating |
Both sides AR coated, R<0.25% per face @ central wavelength |
| Damage Threshold |
>500mJ/cm2, 20ns, 20Hz @1064nm |
Standard Products of True Zero Order λ/2 Half Wave Plate:
| Part Number |
Type |
Diameter
(mm)
|
Retardation
(λ)
|
Wavelength
(nm)
|
Clear Aperture
(mm)
|
| WPF212-633 |
Cemented |
12.7 |
λ/2 |
633 |
11.5 |
| WPF225-633 |
Cemented |
25.4 |
λ/2 |
633 |
22.9 |
| WPF212-780 |
Cemented |
12.7 |
λ/2 |
780 |
11.5 |
| WPF225-780 |
Cemented |
25.4 |
λ/2 |
780 |
22.9 |
| WPF212-795 |
Cemented |
12.7 |
λ/2 |
795 |
11.5 |
| WPF225-795 |
Cemented |
25.4 |
λ/2 |
795 |
22.9 |
| WPF212-852 |
Cemented |
12.7 |
λ/2 |
852 |
11.5 |
| WPF225-852 |
Cemented |
25.4 |
λ/2 |
852 |
22.9 |
| WPF212-894 |
Cemented |
12.7 |
λ/2 |
894 |
11.5 |
| WPF225-894 |
Cemented |
25.4 |
λ/2 |
894 |
22.9 |
| WPF212-1310 |
Cemented |
12.7 |
λ/2 |
1310 |
11.5 |
| WPF225-1310 |
Cemented |
25.4 |
λ/2 |
1310 |
22.9 |
| WPF212-1550 |
Cemented |
12.7 |
λ/2 |
1550 |
11.5 |
| WPF225-1550 |
Cemented |
25.4 |
λ/2 |
1550 |
22.9 |
Retardance Graph of True Zero Order Waveplate:
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633nm Ture Zero Order Waveplate
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780nm Ture Zero Order Waveplate
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795nm Ture Zero Order Waveplate
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852nm Ture Zero Order Waveplate
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894nm Ture Zero Order Waveplate
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1310nm Ture Zero Order Waveplate
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1550nm Ture Zero Order Waveplate
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