Optical engine
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An optical engine from Compound Photonics next to a dime for scale
An optical engine is an image projector used in a near-eye display such as augmented reality glasses. Optical engines are also known as optical modules.[1]
TI sells evaluation modules with optical engines in them for their DLP line of display components.
It generally doesn't refer to a waveguide, but WaveOptics for example includes the waveguide in what they call their optical engines.[1]
Lumus sells optical engines that work with their waveguides.
An optical engine includes a display source and projection optics.
TI publishes optical engine designs in Zemax format.
Two types of display sources that can be used are LCOS and MicroLED.[2]