Patent ID: 8651707
Filing Date: 2014-02-18
Classification: F21V

Abstract:
1. An optical lens, for guiding light of an LED to produce a quasi-elliptical light pattern, and the optical lens having a lens body, comprising: an emitting surface, being a curved surface, and having an illumination side substantially in a quasi-elliptical shape, a long axis and a short axis, and the long axis having a length a, and the short axis having a length b, and the short axis being perpendicular to the long axis, and the emitting surface having a center position with a vertex P; and an incident surface, coupled to the emitting surface to form an external surface of the lens body, and having a concavely curved surface and a bottom surface, and the concavely curved surface being provided for containing the LED, and the lens body having a lens height c, and the length a of the long axis, and the length b of the short axis, and the lens height c satisfying the relations of 1<a/b≦1.67 and 2≦a/c≦6.