REDUCING SPECKLE IN PROJECTED IMAGES

摘要

A despeckle optical system for an image projector includes a diffuser, an in-plane vibrator, a microlens array, and a vibrator driver. The in-plane vibrator is coupled to vibrate the diffuser along a vibration plane. The vibrator driver is coupled to drive the in-plane vibrator and configured to drive the in-plane vibrator at different vibration amplitudes for averaging the intensity of speckle in display light that propagates through the diffuser via the microlens array.

主权项

1. An image projector comprising:
at least one light source for generating display light; a despeckle module including:
a diffuser;a microlens array disposed between the at least one light source and the diffuser, wherein the diffuser is positioned to receive the display light from the at least one light source through the microlens array;an in-plane vibrator coupled to vibrate the diffuser along a vibration plane; anda vibrator driver coupled to drive the in-plane vibrator, wherein the vibrator driver is configured to drive the in-plane vibrator at different vibration amplitudes for averaging the intensity of speckle in the display light; and a display panel positioned to receive the display light from the despeckle module, wherein the display panel is configured to generate a projectable image using the display light.