Patent ID: 6890081
Filing Date: 2005-05-10
Classification: G02B

Abstract:
1. An optical element formed from a transparent optical material, comprising: two refraction surfaces; a first reflection surface group having a plurality of internal reflection surfaces arrayed in a predetermined direction; a second reflection surface group opposing said first reflection surface group and having at least one internal reflection surface; a connecting portion formed between adjacent surfaces among said two refraction surfaces, said plurality of internal reflection surfaces of said first reflection surface group, and said at least one internal reflection surface of said second reflection surface group, which does not substantially influence optical performance; and a molding auxiliary portion for assisting in performing a molding operation, said molding auxiliary portion being provided at said connecting portion, wherein light incident from one refraction surface is alternately reflected by the internal reflection surfaces of said first reflection surface group and the internal reflection surface of said second reflection surface group and guided to the other refraction surface.