Laminated light guide collimator

摘要

The subject matter disclosed herein relates to an optical device comprising: a light guide film to transport light rays via total internal reflection; a first optical layer covering at least a portion of a first side of the light guide film, the first optical layer to receive an exiting portion of the light rays; a second optical layer covering at least a portion of the first optical layer; and a grating pattern located at an interface between the first optical layer and the second optical layer to out-couple light rays travelling in the light guide film, wherein the grating pattern is configured so that the exiting portion of the light rays transmit through the grating pattern twice before being total internally reflected by the grating pattern.

主权项

1. A device comprising:
a light guide film to transport light rays via total internal reflection; and a composite optical coating to out-couple light rays travelling in the light guide film, wherein the composite optical coating covers at least a portion of a first side of the light guide film, and wherein the composite optical coating comprises:
a first optical layer adjacent to the light guide film to receive an exiting portion of the light rays;a second optical layer covering at least a portion of the first optical layer; anda grating pattern located at an interface between the first and the second optical layers, wherein the grating pattern is configured so that the exiting portion of the light rays transmit through the grating pattern at least twice before being total internally reflected by the grating pattern at an angle that out-couples the exiting portion of the light rays.