Light source with small beam angle

Abstract

The invention discloses a light source with a small beam angle. The light source comprises a semiconductor light-emitting element and a lens, the semiconductor light-emitting element is embedded in the lens and is seamlessly combined with the lens. The lens is provided with a top surface and a side surface connected with the top surface; the semiconductor light-emitting element is provided with more than one light-emitting surface, at least one light-emitting surface is arranged towards the top surface of the lens, and at least part of light emitted to the side surface of the lens by the semiconductor light-emitting element can be reflected by the side surface of the lens and then transmitted out along the optical axis. The light source with the small beam angle is simple in structure, andthe light utilization efficiency in reflective lighting application is greatly improved; compared with a light source without a lens, the light emitting power is improved by more than 10%; compared with a secondary lens, the primary lens is small in size and light in weight, seamless connection with a chip is achieved in the light source packaging process, installation is convenient, and the light emitting rate is improved; meanwhile, the manufacturing process is simple, convenient, low in cost, small in size and suitable for large-scale manufacturing and application.

Description

technical field [0001] The invention relates to the design of a semiconductor lighting source, in particular to a light source with a small beam angle. Background technique [0002] In recent years, LED light sources have been widely used in the lighting field. At present, most LED light sources generally do not add a primary lens or add a hemispherical primary lens when they are applied. The light field obtained by this light source is usually Lambertian, such as figure 1 As shown, the beam angle of the Lambertian light field is larger. In some applications, LED light sources with small beam angles are required, such as: transmissive searchlights, transmissive flashlights, stage lights and other applications. In order to further expand the LED light source application market, it is necessary to optimize its design. [0003] At present, the light with a small beam angle can be obtained by designing a suitable secondary lens in the lamp, but the light emitted from the LED ...

AI Technical Summary

Problems solved by technology

There are usually gaps and distances between the secondary lens and the light source, and they are not connected as a whole

Compared with the primary lens, the secondary lens in the lamp cannot increase the light extraction efficiency of the LED, but can only change the propagation path of the light emitted from the LED to the outside world. The secondary lens has a large volume and weight and high cost

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