Waveplate - e-mail request

Waveplates are used to change the polarization type of the incident radiation by unequally phase-shifting its orthogonally polarized components.
Del Mar Photonics manufactures Multiple Order and Cemented Zero Order Quarter and Half Waveplates from high quality artificial crystal quartz.
Multiple Order Waveplates are fabricated from a single 1 mm thick plate, pic.2. The retardence at the specified wavelength is equal to an integral namber of waves plus 1/4 or 1/2 λ.
Zero Order Waveplates are made from two individual plates of crystalline quartz, optically contacted with the direction of retardation opposed, pic.1. The final retardation is the net difference in retardation of the two plates, 1/4 or 1/2 λ.

Achromatic l/2 waveplate

Achromatic l/4 waveplate

Standard specification

Material	Crystal Quartz
Design wavelength	Waveplate can be designed and fabricated at any wavelength between 250 and 1550 nm
Diameter	Ø 12.7 and Ø 25.4 mm
Thickness L	Multiple: ~1 mm Zero Order: ~2 mm
Tolerance	Diameter: +0.0/-0.25 mm
Surface Quality	S/D 10/5
Wavefront distortion	λ/10 @ 633 nm
Parallelism	Multiple: < 1 arcsec Cemented zero order: < 30 arcsec Optically-contacted zero order: < 1 arcsec
Reterdation tolerance	λ/300 at 22°C
Bevels	None
Chips	< 0.4 mm
AR coating	R < 0.25% @ designed wavelength
Max. handling power	Multiple: 200 MW/cm², pulsed Cemented zero order: 1 W/cm², CW Optically-contacted zero order: 200 MW/cm², pulsed

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