ZONED OPTICAL WAVEPLATE

摘要

A zoned waveplate has a series of transversely stacked birefringent zones alternating with non-birefringent zones. The birefringent and non-birefringent zones are integrally formed upon an AR-coated face of a single substrate by patterning the AR coated face of the substrate with zero-order sub-wavelength form-birefringent gratings configured to have a target retardance. The layer structure of the AR coating is designed to provide the target birefringence in the patterned zones and the reflection suppression.

主权项

1. A zoned optical waveplate (ZWP) comprising:
a substrate that is transparent to light of a target wavelength λ; and an anti-reflection (AR) coating disposed over the substrate and defining an AR coated face of the substrate, wherein the AR coated face of the substrate comprises a series of spaced apart patterned zones alternating with non-patterned zones or differently-patterned zones in a transverse direction, each patterned zone, of the series of spaced apart patterned zones, comprising a first zero-order form-birefringent sub-wavelength (ZOFBSW) grating that is configured to provide a first target retardance for light of the target wavelength.