Rob Brown Head Up Display Background Classical Optics Waveguide Optics Classical Optics Waveguide Displays Vuzix Sony Waveguide combiner using diffraction gratings Light from the collimating optics is diffracted at high angles by the Input Coupler diffraction grating ID: 615182
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Slide1
Waveguide Displays
Rob BrownSlide2
Head Up Display BackgroundSlide3
Classical Optics
Waveguide OpticsSlide4
Classical OpticsSlide5
Waveguide Displays
Vuzix
SonySlide6
Waveguide combiner using diffraction gratings
Light from the collimating optics is diffracted at high angles by the Input Coupler diffraction grating.
Light propagates down waveguide.
Output Coupler diffraction grating diffracts light out of the waveguide a little at a time, so that it can be seen by the pilot.
Each bounce produces a virtual image of the collimator, more on that next.
Collimating
Optics
Input Coupler Diffraction Grating
Display
Device + Illuminator
To Pilot’s Eyes
`
Continuous output coupling grating with gradient efficiencySlide7
Multiple Beamsplitter
Approach
Beamsplitters
can be used instead
of gratings:
Collimating optics
Eyeball
Faceted optics with coatings
Optics are very expensive to manufacture:
Grind, polish, coat
beamsplitter
Cut into many pieces
Bond assembly
Regrind,
repolish
, AR coat
Artifacts such as bands appear across FOV.Slide8
Single Axis Expansion Visualized
waveguide
collimating lens
expanded pupil
8
9Slide9
Expansion in two dimensions
Vertical Beam Expander
Single Axis Beam Expansion
Collimating Optics Aperture is 0.75” x 3.0”
To Pilot’s Eyes
Output Coupler
Input Coupler
Collimator
Dual Axis Beam Expansion
Collimating Optics Aperture is 0.75” x 0.75”
To Pilot’s Eyes
Horizontal Beam ExpanderSlide10
Dual Axis Expansion Visualized
collimating lens
laterally expanded pupil
(not visible to pilot)
8
9
8
9
vertically expanded pupil
vertical expansionSlide11
Waveguide display for two eyes