| 摘要 |
A linear light source apparatus (100) includes a light guide member (120) made of a transparent resin, and a light emitting element (200) for emitting light to the light guide member (120). The light guide member (120) includes a columnar main body (130), and a first end (121) and a second end (122) at two ends of the main body (130). The main body (130) includes a circumferential surface that is a smooth mirror surface and formed with a plurality of recesses (131) or projections (132) in a predetermined strip-shaped region extending in the longitudinal direction. The light emitted from the light emitting element (200) is emitted from a region of the main body (130), which faces the strip-shaped region, along the length of the main body (130). The recesses (131) or projections (132) extend straight in the width direction of the strip-shaped region.
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