The MT Waveplate is made of one piece of birefringence crystal plate and very thin waveplate with zero-order or low-order.
In general, the thickness of true zero waveplate is very thin. In case of UV waveplate, especially its thickness is very thin around 10µm.
To solve the problem fo processing difficulty, the waveplate is normally manufactured with double-plate structure or attached to synthetic quartz glass plate.
However, the double-plate structure has higher retardation dependence of incident angle along with the increase of the total thickness.
On the other hand, glass plate-attached type has a concern about reliability of bonded part.
That's why we sell the MT waveplate which is the simplest structure with one crystal plate by thinning technology which utilized high accurate processing.
The waveplate thickness is around 10µm with AR coating on both sides and holder mounted for easy handling.
The remarkble features of MT waveplate are Less A.O.I. dependence of retardation, no optical contact, high trancemittance.
Although the standard specifications are for λ=193nm, 213nm, 266nm, we can product it for other wavelengths.Specifications
| Part No. | MTH193 | MTQ193 | ||
|---|---|---|---|---|
| Surface Quality | S/D = 30/10 | |||
| Wavefront, PV (λ) | ≦1/10 @ 633nm | |||
| Wavelength (nm) | 193.4 | |||
| Retardation (deg) | 180 | 270 | ||
| Retardation Error (deg) | ≦±3 | ≦±3 | ||
| Coating | Both sides AR-coated R≦0.5% A≦1.0% |
Both sides AR-coated R≦0.5% A≦1.0% |
||
| Transmittance (%) | ≧96 | ≧96 | ||
| Clear Aperture (mm) | φ16 | φ12 | φ16 | φ12 |
| Holder Diameter(mm) | φ30 | φ25.4 | φ30 | φ25.4 |
| HolderThickness(mm) | 3 | 3 | 3 | 3 |
| Part No. | MTH213 | MTQ213 |
|---|---|---|
| Surface Quality | S/D = 30/10 | |
| Wavefront, PV (λ) | ≦1/10 @ 633nm | |
| Wavelength (nm) | 213 | |
| Retardation (deg) | 180 | 270 |
| Retardation Error (deg) | ≦±3 | ≦±3 |
| Coating | Both sides AR-coated R≦0.5% |
Both sides AR-coated R≦0.5% |
| Transmittance (%) | ≧97 | ≧97 |
| Clear Aperture (mm) | *1) φ12 | *1) φ12 |
| Holder Diameter(mm) | *1) φ25.4 | *1) φ25.4 |
| HolderThickness(mm) | 3 | 3 |
| Part No. | MTH266 | MTQ266 |
|---|---|---|
| Surface Quality | S/D = 30/10 | |
| Wavefront, PV (λ) | ≦1/10 @ 633nm | |
| Wavelength (nm) | 266 | |
| Retardation (deg) | 180 | 270 |
| Retardation Error (deg) | ≦±2 | ≦±2 |
| Coating | Both sides AR-coated R≦0.5% |
Both sides AR-coated R≦0.5% |
| Transmittance (%) | ≧97 | ≧97 |
| Clear Aperture (mm) | *1) φ12 | *1) φ12 |
| Holder Diameter(mm) | *1) φ25.4 | *1) φ25.4 |
| HolderThickness(mm) | 3 | 3 |
Holder
Comparison of Wavelength dependence
Comparison of A.O.I. dependence
| HWP/QWP | Type of Waveplate | Temperature dependence (° /°C) |
| HWP | MTH193 | -0.093 |
| 0 order double plate : MgF2 | -0.0054 | |
| High order single plate : MgF2 | -0.12 | |
| QWP | MTQ193 | -0.139 |
| 0 order double plate : MgF2 | -0.0027 | |
| High order single plate : MgF2 | -0.12 |
AR Coating Reflectance Spectrum
Transmittance Spectrum
