Condenser lens of LED (light emitting diode)

Abstract

The invention discloses a condenser lens of an LED (light emitting diode). The condenser lens is a rotary body in a shape of a circular truncated cone and is provided with an optical axis which is superposed with a rotary shaft of the rotary body. The condenser lens comprises a light source containing slot, a light emitting surface and a full reflecting surface, wherein the light source containing slot corresponds to a small end of the condenser lens, the light emitting surface corresponds to a large end of the condenser lens, the full reflecting surface is positioned on the outer sidewall of the condenser lens, the light source containing slot is a cylindrical slot, the bottom of the cylindrical slot is provided with an outwards protruded first conical surface, the middle part of the light emitting surface is sunken inwards so as to form a second conical surface and an annular surface, the second conical surface is arranged at the middle part of the light emitting surface and is protruded outwards, the annular surface surrounds the second conical surface, the vertexes of the first conical surface and the second conical surface are arranged on the optical axis, and the first conical surface and the second conical surface commonly define one central light condensation part. Compared with the prior art, the condenser lens of the LED, disclosed by the invention, has a high-efficiency condensation function on the LED, and emitted light is almost parallel to the optical axis after light rays emitted by the LED are acted by the condenser lens of the LED; and the condenser lens of the LED can improve the utilization rate of a lamp on the luminous flux of the LED.

Description

technical field [0001] The present invention relates to the technical field of LED (Light Emitting Diode, light emitting diode) condensing lens, and more specifically, relates to a lens with high-efficiency condensing function. Background technique [0002] In order to realize the light concentrating of LEDs, one method in the prior art is to use a reflector with a parabolic surface to achieve light concentrating, but this method is difficult to apply to occasions where the luminous angle is small (such as when the luminous angle is less than 5 degrees). Increase the size of the reflector, otherwise the light with a smaller luminous angle cannot be used, and eventually the luminous angle of the light will increase. [0003] In the prior art, there are also technical solutions that use convex lenses to concentrate light on LEDs, but these solutions have the problem of low LED luminous flux utilization, which is specifically manifested in the fact that light with a large lumin...

AI Technical Summary

Problems solved by technology

However, these LED condenser lenses usually have defects such as high molding process requirements and difficult processing.

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