Lumus Ltd.

Aviv Frommer

Eitan Ronen

Naamah Levin

Jonathan Gelberg

Lilya Lobachinsky

Ari Grobman

Eli Glikman

A vehicular head-up display (HUD) for displaying an image to a user of a vehicle having a windshield () includes an image projector () outputting a collimated image and an optical aperture expander. The optical aperture expander includes a light-guide optical element (LOE) () having two major external surfaces (). The image projector () injects the collimated image so as to propagate within the LOE by internal reflection at the major external surfaces. The LOE also has a set of parallel partially-reflecting internal surfaces () which progressively couple out the image illumination from the LOE. The optical aperture expander is deployed such that the image illumination coupled-out of the LOE () follows a light path including a reflection from a surface associated with the windshield () of the vehicle so as to be visible to the user while the user looks at a scene beyond the windshield.

Vehicle head-up display (HUD)

In one method, a display source aligned with an illumination prism assembly is displaced along a displacement axis to adjust the distance between the display source and a collimating prism assembly. The display source, the illumination prism assembly, and an illumination module are translationally moved in unison in a plane normal to the displacement axis. In another method, a component of an optical device is coupled to a mechanical assembly at a known orientation. The mechanical assembly has a test pattern at a known orientation. An image sensor is aligned with the test pattern, and the image sensor captures an image of the test pattern. The captured image is analyzed to determine an estimated orientation of the test pattern. An orientation parameter of the image sensor is adjusted based on a comparison between the known orientation of the test pattern and the estimated orientation of the test pattern.

Optical device alignment methods

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Yokneam Moshava, Israel

Aviv Frommer