FIELD: physics.
SUBSTANCE: light-emitting device (10) has a light-emitting element (1) and an element (2) for controlling light emitted by the light-emitting element (1). The light flux control element (2) has (i) a light-receiving surface (2a) on which light emitted by the light-emitting element (1) falls, and (ii) a light-emitting surface (2b).
EFFECT: high uniformity of light intensity, low reflection coefficient due to Fresnel reflection, improved scattering characteristics.
13 cl, 21 dwg
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