A Light-weight Annotation System Using a Miniature Laser Projector

A small, hand-held laser projector is developed using a MEMS scanning mirror. The vertical scan is done by the vibrating mirror and the horizontal scan is done by the user’s action to swing this projector. The prototype is equipped with the photo sensor and barcode reader circuit module to identify the real object with the retroreflective barcode. When the user swing this projector, projector begin to search the object with barcode ID, and when the projector detect such object, the annotation associated with the object’s ID is displayed.