Importance

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Abstract

An indicator light (1) includes a light source, a lens (4), and a cylindrical globe (5). The light source includes a center LED (2A) disposed on a disposition surface parallel to a central axis (C1) and having an optical axis perpendicular to the disposition surface and a pair of side LEDs (2B, 2C). The lens includes a central lens portion (4A) and a pair of side lens portions (4B, 4C). The central lens portion emits light to a central radiation angle range (A1) centering on a central light-emission reference line (L1) along a reference normal line (BN) of the disposition surface. The pair of side lens portions (2B, 2C) emit light to a pair of side radiation angle ranges (A2, A3), respectively, that contain a pair of side light-emission reference lines (L2, L3), respectively, that are inclined mutually-opposite directions at an inclined angle of 60° with respect to the central light-emission reference line (L1). The central lens portion includes a central light incidence portion (32) having a central incidence surface (31) on which light from the central LED is made incident and a plurality of central light guiding portions (33) that branch from the central light incidence portion in the shape of branches and that extend toward the globe side. In each of the central light guiding portions, light that has been refracted and has been made incident from a corresponding incidence region of the central incidence surface onto the corresponding central emission surface is refracted and emitted from the corresponding central emission surface toward a corresponding region of the central radiation angle range.

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