Patent ID: 8998475
Filing Date: 2015-04-07
Classification: G02B

Abstract:
1. A lighting system comprising: a light source; and a light guiding member for guiding light from the lighting source, wherein the light guiding member includes a light guiding body to which light from the light source is input, a low refractive index layer which is provided on a rear surface of the light guiding body without an air layer, and of which a refractive index is lower than that of the light guiding body, and an inclined plane which is inclined to an optical axis of the light from the light source, wherein a plurality of first reflecting units which make an input angle of the light from the light source with respect to the rear surface of the light guiding body gradually small are provided on a front face side, or the rear surface of the light guiding body, wherein a plurality of second reflecting units which cause the light from the light source to be totally reflected forward in an interface between the rear surface of the light guiding member and an air layer are provided on the rear surface of the light guiding member, and wherein the inclined plane causes the input light to be reflected in a direction which is close to an optical axis.