Microvision, Inc.

Thomas Byeman

Alga Lloyd Nothern, Iii

Matthieu Saracco

Sumit Sharma

Naili Yue

Roeland Collet

Nara Va

Devices and methods are described herein to measure optical power in scanning laser projectors. In general, the devices and methods utilize a polarizing component and photodiode to measure optical power being generated by at least one laser light source. The polarizing component is configured to polarize at least a portion of the laser beam in a way that improves the accuracy and consistency of this optical power measurement. Specifically, the polarizing component filters at least a portion of the laser beam for one polarization state in a way that facilitates improved reliability in the amount of laser light directed into the photodiode.

Optical power sensing devices and methods

A beam combining device combines laser beams and performs speckle reduction of the laser light. Two laser beams are incident on a non-polarizing beam splitter and combined beams are split into two light paths with different optical path lengths. The two light paths may have different geometric path lengths and/or different indices of refraction in the paths to produce the different optical path lengths. One of the light paths is passed through a polarization rotation device and then the two light paths are recombined with a polarizing beam splitter to produce a combined reduced speckle laser beam.

Method and apparatus for laser beam combining and speckle reduction

The embodiments described herein provide improved scanner assemblies that include a first plastic body, a second plastic body, a movable scanning platform and a drive device. The first plastic body includes a first plurality of coupling structures, while the second plastic body includes a second plurality of coupling structures. The moveable scanning platform is positioned between the first plastic body and the second plastic body, and each of the first plurality of coupling structures is welded to a corresponding one of the second plurality of coupling structures.

Laser welded scanner assemblies

The embodiments described herein provide improved techniques for laser welding. These techniques can provide improved weld strength while reducing the potential for damage at the welding surface. In general, the techniques use a mask to selectively block a portion of the laser beam during welding. Specifically, the mask is made to include at least one laser light blocking feature and at least one laser light passing feature. The mask is positioned to be in contact with the plastic bodies that are to be welded together, with the laser light blocking feature and laser light passing feature proximate to the area that is to be welded. Then during welding the laser beam is operated to simultaneously impact the laser light blocking feature and pass through the laser light passing feature.

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Redmond, WA, United States of America

Thomas Byeman