Light guiding apparatus, lighting apparatus, space modulation part, and image projection apparatus

摘要

A light guiding apparatus has a first transparent member, a second transparent member, and a transparent member holding portion. The first transparent member has a light entry surface, a first side surface at which guidance of light by way of complete reflection of the emitted light is performed when the second transparent member is separated, and the emitted light is transmitted into the second transparent member when the second transparent member is in contact, and a first light emitting end surface. The second transparent member has a second side surface, and a third side surface at which when the two side surfaces are in contact with each other, guidance of light toward at least the first light emitting end surface by way of complete reflection of the emitted light is performed.