*4.2.1. PoC GS generation module*

A novel method of GS creation has been implemented in the PoC prototype, whereby the CLA that is part of the WFS is also utilized to create the GS beams. Collimated 835±10 nm SLD light from a single mode fiber is polarized (PFP) and passes through a multi-aperture stop with five apertures (PMGS) that are aligned to the five CLA lenses. Since the CLA is used for GS generation and also enables single point spatial filtering in the multi-reference WFS we have an auto-collimating arrangement that greatly reduces system complexity and alignment. The GS rays pass through standard and custom relay optics and the DMs before entering the eye, where they form five spots arranged in an 'X' formation. The four periph‐ eral GSs are diagonally displaced from the central GS by a visual angle of 3.1 deg (880 µm) on the retina.
