Provided is a light tunnel including a guide member for guiding an incident light to proceed therein while being reflected by a side wall thereof to merge the incident light into a uniform light beam, and an optical path change portion provided at least one end portion of the guide member inclined at a predetermined angle with respect to an optical axis of an incident light to reflect the incident light and direct a path thereof.

 
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< Glass optical waveguide

> Image display apparatus

~ 00431