Effects of polarisation and spatial coherence in the pupil expansion with crossed gratings in an AR display

Choon How Gan; Marie-Elena Kleemann; Anna Golos; Salim Valera

doi:10.1117/12.2555330

30 March 2020 Effects of polarisation and spatial coherence in the pupil expansion with crossed gratings in an AR display

Choon How Gan, Marie-Elena Kleemann, Anna Golos, Salim Valera

Author Affiliations +

Proceedings Volume 11350, Digital Optics for Immersive Displays II; 1135002 (2020) https://doi.org/10.1117/12.2555330
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

Pupil replication with crossed gratings in an AR display is modelled and characterised. It is found that, compared to linear gratings, crossed gratings in a hexagonal lattice offer an additional degree of freedom to control the angular spread of pupils and can potentially improve the uniformity of the pupil map. In terms of characterisation, the model explains well the trend observed in experiments. Good quantitative agreement of the relative pupil intensity is obtained for a number of the measured waveguides.

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Choon How Gan, Marie-Elena Kleemann, Anna Golos, and Salim Valera "Effects of polarisation and spatial coherence in the pupil expansion with crossed gratings in an AR display", Proc. SPIE 11350, Digital Optics for Immersive Displays II, 1135002 (30 March 2020); https://doi.org/10.1117/12.2555330

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