Fresnel lens

A Fresnel lens and arc-shaped technology, applied in the field of Fresnel lenses, can solve problems such as yellow circles and stripes, and achieve the effect of preventing yellow circles and stripes

Inactive Publication Date: 2016-05-11
FOSHAN NANHAI SHENGLI LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ordinary Fresnel lenses can only achieve flood lighting around 40°, but when the light output angle needs to be narrowed to a small angle below 40°, yellow circles and stripes are prone to appear

Method used

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] Such as Figures 1 to 6 A kind of Fresnel lens of the present invention shown, comprises incident surface 2 and the emergent surface 3 that is arranged opposite to incident surface 2, and emergent surface 3 has an arc-shaped convex surface 4, and the periphery of arc-shaped convex surface 4 is surrounded by several circles of convex ridges 5 The convex ridge 5 extends toward the central axis of the arc-shaped convex surface 4, the wall surface on the opposit...

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Abstract

The invention provides a fresnel lens. The fresnel lens comprises an incident face and an emergent face opposite to the incident face. The emergent face is provided with an arc-shaped protruding face. Multiple circles of protruding ridges are arranged outside the arc-shaped protruding face in an enclosure manner. The protruding ridges extend in the direction of a center shaft of the arc-shaped protruding face. The wall faces of the sides, opposite to the arc-shaped protruding face, of the protruding ridges are adjusting faces. The included angle of the intersecting positions of the adjusting faces and the center shaft of the arc-shaped protruding face ranges from 20 degrees to 30 degrees. According to the fresnel lens, the light-emitting angle, ranging from 120 degrees to 140 degrees, of an LED chip can be controlled effectively to obtain even small-angle light applicable angle ranging from 23 degrees to 40 degrees, and the accent lighting design requirement is met.

Description

technical field [0001] The invention relates to an optical lens, in particular to a Fresnel lens. Background technique [0002] At present, when a lamp performs flood lighting, the light beam is converted into a flood light beam through a Fresnel lens. The Fresnel lens has an incident surface and an exit surface, and the exit surface is composed of a circle of sawtooth ring lenses, and each circle of sawtooth is equivalent to an independent convex lens. The light emitted by the light source is refracted by the two surfaces of the serrated lens, and the angle of the emitted light shrinks toward the axis, thereby making the angle of the emitted light smaller. The general Fresnel lens can only achieve flood lighting of about 40°, but when the light output angle needs to be narrowed to a small angle below 40°, yellow circles and stripes are prone to appear. Therefore, in order to avoid the shortcomings existing in the prior art, it is necessary to improve the prior art. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/04F21V14/06F21Y101/02
Inventor 周红
Owner FOSHAN NANHAI SHENGLI LIGHTING
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