Lens and LED lamp using lens

Abstract

The invention discloses a lens and LED lamp using the lens. The lens is a ring-shaped lens which is arranged around a central axis and provided with a ring-shaped inner side surface and a ring-shaped outer side surface opposite to each other in the radial direction; the lens is provided with a light-in end and a light-out end opposite to each other in the direction of the central axis; an accommodating groove is formed in the light-in end; a light-in surface is formed on the groove wall of the accommodating groove; both the ring-shaped inner side surface and the ring-shaped outer side surface are total internal reflection surfaces and respectively formed in the way a first arc and a second arc rotate around the central axis for a circle; the light-in surface and the light-out surface are respectively formed in the way that a light-in section and a light-out section rotate around the central axis for a circle; the LED lamps are located at any position of the accommodating groove in the circumferential direction of the lens; after the light rays of the LED lamps are ejected through the lens, the light-out angles on the lens in the radial direction are the same, so that the number of the LED lamps only influences the illumination intensity of the LED lamps; after the light-out angles are determined, the LED lamps with different illumination requirements can use the lens, so that the product development cost is reduced.

Description

technical field [0001] The invention relates to the lighting field, in particular to a lens and an LED lamp using the lens. Background technique [0002] In LED lighting products, in order to realize the light distribution angle, it is necessary to set an optical lens on the LED light source. The optical lens is generally made of plastic, and the refractive index is generally between 1.4 and 1.6. After reasonable optical design, it can constrain the light emitted by the LED lamp within a certain angle to meet the requirements of regional lighting. For medium and high power LED lighting products, multiple LEDs are generally used. In the prior art, the optical lens is generally a full-page lens with multiple acupoints. For serialized products, when different numbers of LEDs are required, a set of full-page lenses cannot meet the requirements, so it is necessary to develop multiple sets of molds. As a result, the development cost is too high. It can be seen that the commonali...

AI Technical Summary

Problems solved by technology

In the prior art, the optical lens is generally a full-page lens with multiple acupoints. For serialized products, when different numbers of LEDs are required, a set of full-page lenses cannot meet the requirements, so it is necessary to develop multiple sets of molds. Leading to too high development cost, it can be seen that the commonality of full-page lenses in the prior art is poor

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