Lens and light-emitting device

Abstract

The invention provides a lens and a light-emitting device. The lens comprises a first lens body, a second lens body and a reflective film. The first lens body is provided with a bottom surface, an incident surface and a circumferential side surface, and the circumferential side surface is a first emergent surface; the incident surface is arranged in the middle, and the second lens body is connected with the top surface of the first lens body; the top surface is a total reflection surface which is in a smooth curved surface shape, and the circumferential side surface is a second emergent surface which is in a smooth curved surface shape; the reflective film is arranged at a central area of the total reflection surface and is used for covering hot spots. Incident light beams are divided into two parts to be emitted, a first part is emitted by the first emergent surface to form a plurality of first emergent light beams, and a second part is reflected by the second lens body, the reflective film and the total reflection surface and then is emitted by the second emergent surface to form a plurality of second emergent light beams; the plurality of first emergent light beams respectively tilt upwards relative to the bottom surface, and the plurality of second emergent light beams respectively tilt downwards relative to the bottom surface. The light-emitting device comprises the lens and an LED (Light Emitting Diode) plane light source. 本发明提供一种透镜和发光装置，透镜包括第一透镜本体、第二透镜本体和反射膜。第一透镜本体具有底面、入光面和周侧表面，周侧表面为第一出光面，且入光面居中设置；第二透镜本体连接于第一透镜本体的顶面，顶面为平滑曲面形状的全反射面，周侧表面为平滑曲面形状的第二出光面；反射膜设于全反射面的中心区域，用于遮掩热点。入射光线分成两部分出射，第一部分由第一出光面射出形成若干条第一出射光线；第二部分经第二透镜本体、反射膜和全反射面反射后由第二出光面射出形成若干条第二出射光线，若干条第一出射光线分别相对于该底面向上倾斜，若干条第二出射光线分别相对于该底面向下倾斜。发光装置包括透镜及LED面光源。