Multiple order waveplate means the retardance of a light path will undergo a certain number of full wavelength shifts in addition to the fractional design retardance. The thickness of multi order waveplate is always around 0.5mm. Compared with zero order waveplate, multi order waveplate is more sensitive to wavelength and temperature changes. However, they are less expensive and widely used in many applications where the increased sensitivities are not critical.

Thickness: 0.3-0.5 mm High Damage Threshold Better wavefront and parallelism Low Cost RoHS Compliant

Specifications

Material Crystal Quartz Dimension Tolerance +0.0/-0.2mm Wavefront Distortion λ/8@632.8nm Retardation Tolerance λ/100 Parallelism <1 arc second Surface Quality 20/10 scratch and dig Clear Aperture >90%central area AR Coating R<0.25%@central wavelength Standard Wave quarter-wave(λ/4), half-wave(λ/2) Wavelength Range 190-2200nm

λ/2 Part No.	λ/4 Part No.	Diameter(mm)
WM210	WM410	10.0
WM212	WM412	12.7
WM215	WM415	15.0
WM220	WM420	20.0
WM225	WM425	25.4
WM230	WM430	30.0
WM238	WM438	38.1