Patent ID: 8562199
Filing Date: 2013-10-22
Classification: F21S,F21V,F21Y,G02B

Abstract:
1. A lighting device comprising: an LED light source having an optical axis; and a plate-like lens body including a front surface, a rear surface, a first side surface with a width dimension longer than a thickness dimension and serving as an elongated rectangular light exiting surface, and a second side surface opposite to the first side surface, wherein the LED light source is disposed to face towards the second side surface of the lens body so that light travelling in a thickness direction of the lens body out of light radially emitted from the LED light source in a wide angle direction with respect to the optical axis is directed to at least one of the front surface and the rear surface of the lens body and so that light radially emitted from the LED light source in a narrow angle direction with respect to the optical axis impinges on the second side surface of the lens body to enter the lens body; the lens body includes at least a first optical system and a second optical system, the first optical system including the second optical system including an air layer located between the lens portion and the first light incident surface and configured to allow the light gathered by the lens portion to pass therethrough.