Lens and LED light source device adopting same

Abstract

The invention is applicable to the technical field of optics, and provides a lens. The lens has an elliptical base, an elliptical upper part, and a body connecting the elliptical base and the elliptical upper part. The elliptical base is provided with a concave cavity for accommodating an LED wafer. The ratio of the short axis to the long axis of the elliptical base is 0.5-0.75. The light emittedby the LED wafer is refracted into the lens through the top surface of the concave cavity, and then, refracted to a preset illumination area through the surfaces of the body and the elliptical upper part. The stray light around the preset illumination area is greatly reduced, the effective light intensity in the center is correspondingly enhanced, and the requirements of various LED light source devices, especially an infrared emitter tube, for the spot are fully met. In addition, according to an LED light source device provided by the embodiment of the invention, an LED support and the bottomof the lens are bonded by adhesive glue, and the area between the side of the concave cavity and the side of the LED wafer is also filled with adhesive glue. Thus, the bonding surface between the lens and the LED support is greatly expanded, the firmness of the lens bonded to the LED support is greatly enhanced, and the failure rate caused by the lens falling off the LED support is greatly reduced.

Description

technical field [0001] The invention belongs to the field of optical technology, in particular to a lens and an LED light source device using the lens. Background technique [0002] Today, various LED light source devices have higher and higher requirements for light efficiency and brightness. In addition to LED chips, lenses are also a very important factor. However, the existing lenses have weak light control ability, resulting in a lot of stray light, low brightness of the light source device, especially unable to meet the requirements of the infrared emission tube for the light spot. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a lens, aiming at solving the problems that existing lenses have weak light control ability, cause more stray light, and the brightness of light source devices is not high. [0004] The embodiment of the present invention is realized in this way. A lens has an elliptical base, an ellip...

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a lens, aiming to solve the problem that the existing lens has weak light control ability, resulting in more stray light and low brightness of the light source device

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