Optical system and lamp

Abstract

An optical system comprises a light source, a collimating optical element, a second Fresnel lens and a third Fresnel lens, wherein the light source is a point light source; the second Fresnel lens is a cylindrical stretching Fresnel lens, and the light-in surface or the light-out surface of the second Fresnel lens is a continuously-arranged cylindrical array; the third Fresnel lens is a light-splitting Fresnel lens, the light-in surface or the light-out surface of the third Fresnel lens is a continuously-arranged regular triangular prism array, and the axis of the regular triangular prism is perpendicular to the axis of the cylindrical surface of the second Fresnel lens; and light emitted by the light source sequentially passes through the collimating optical element, the second Fresnel lens and the third Fresnel lens and then is emitted to form rainbow light spots. According to the optical system, arc-shaped light spots can be formed by the point light source through the combination of the collimating lens and the stretching lens, and the light emitting effect of the rainbow light spots formed by combining the light-splitting lens is good. Meanwhile, a plurality of layers of Fresnel lenses are adopted, so that the whole optical system is lighter, thinner and smaller.

Description

technical field [0001] The invention relates to an optical system, in particular to an optical system capable of forming colored lighting effects for a lamp, and related lamps. Background technique [0002] With the improvement of people's quality of life, the level of appreciation for lighting effects is gradually increasing. In the field of decorative lights, some colored luminous effects are often required for decoration and other applications. Such as bridges, building exterior walls, curtain walls and other scenes. Rainbow is an optical phenomenon in meteorology. When sunlight hits water droplets in midair, the light is refracted and reflected, forming an arched colorful spectrum (from outside to inside) in the sky: red, orange, yellow, Green, blue, blue, purple. Due to the beauty of the rainbow and it is a rare natural phenomenon, people have always believed that the rainbow is a symbol of beauty, beauty and happiness. Therefore, lighting fixtures that can form rainb...

AI Technical Summary

Problems solved by technology

[0003] The rainbow lights on the market are generally produced by splicing or projection of RGBW multi-color light sources. The control and structural system are cumbersome and complicated, and the cost is high.

There is also a white light source combined with an ordinary prism to form a rainbow spot, but it uses a blocky prism, which can only split the light beam and cannot form a curved and slender rainbow form, and considering the distance from the light source and the strip light source itself The overall size of the lamp is relatively large, so it cannot be applied to various lighting scenarios

Images