New patent promises to double Field of View of HoloLens v2

All about MEMS scanning. We've seen it already, but now others are too. Was already posted on the Magic Leap reddit:

https://mspoweruser.com/new-patent-promises-to-double-field-of-view-of-hololens-v2/

Besides the cost, the biggest issue with the Microsoft HoloLens is the Field of View (FoV) which at 35 degrees has been described as looking at the world through a mail slot.

Microsoft has not made it a secret that they are working on HoloLens v2, and has been explicit about the improved Holographic Processing Unit and improved Kinect-based Depth Sensing Unit.

What Microsoft has not talked about much however has been the optics of the device, but now a new patent suggests Microsoft may have achieved the breakthrough they have been after.

Titled “MEMS LASER SCANNER HAVING ENLARGED FOV”, the December 2016 patent applications explains the method below:

A MEMS laser scanner is disclosed for use in a near-eye display including an increased field of view (FOV). In embodiments, one or more polarization gratings may be applied to the mirror of the MEMS laser scanner, which polarization gratings may be configured according to the Bragg regime. Using light of different polarizations, the MEMS laser scanner is able to expand the FOV without increasing the range over which the mirror of the scanner oscillates.

Recall, from the patent:

The image light is generated by a display engine 140 which emits image light in a step 300 that is modulated on a pixel-by-pixel basis by the controller 124. In embodiments, the display engine 140 may be a commercially available assembly, such as for example the PicoP™ display engine from Microvision, Inc. of Redmond, Wash.