Compound lens capable of producing light ring or light ring with light spot in center as well as optical system capable of realizing zooming of light ring

Abstract

The invention provides a compound lens capable of producing a light ring or a light ring with a light spot in the center as well as an optical system capable of realizing zooming of the light ring. The compound lens comprises a light incident surface and a light emergent surface, wherein the light incident surface is a spherical surface or an aspherical surface; the light emergent surface is a prism side surface, the middle of the prism side surface is a spherical surface, an aspherical surface or a plane, and the rest parts are conical surfaces. The light ring free of secondary rings and stray light or a central point-light ring can be formed, and zooming focusing of the light ring can be realized within a certain distance range, so that produced patterns are still kept clear, the defect that the secondary rings and the stray light exist around main rings is overcome, and the patterns are clean. The compound lens is machined with traditional lens production technologies, so that the compound lens is mature in process, low in cost and low in price.

Description

technical field [0001] The invention belongs to the field of optical technology, and in particular relates to a technology for generating a halo or a light point at the center of the halo while generating the halo, especially an optical technology for reducing secondary rings and stray light around the main ring by means of the imaging technology. Background technique [0002] Diffractive Optical Elements (Diffractive Optical Elements referred to as DOE) produces a halo and a halo with a light spot in the center. It is based on the principle of light diffraction, using a computer to design a diffraction pattern, and embossing the surface of the optical material to form a pattern through microelectronic processing technology. The element belongs to the category of physical optics. Its advantages are easy replication, high diffraction efficiency, and many degrees of freedom in design; its disadvantage is that there are secondary patterns and stray light around the main pattern....

AI Technical Summary

Problems solved by technology

[0002] Diffractive Optical Elements (Diffractive Optical Elements referred to as DOE) produces a halo and a halo with a light spot in the center. It is based on the principle of light diffraction, using a computer to design a diffraction pattern, and embossing the surface of the optical material to form a pattern through microelectronic processing technology. The element belongs to the category of physical optics. Its advantages are easy replication, high diffraction efficiency, and many degrees of freedom in design; its disadvantage is that there are secondary patterns and stray light around the main pattern. figure 1 , 2 Shown are halo and halo-point optical components made by DOE technology, there are secondary rings and stray lights around the main ring, and the cost of making templates is high, and the price of finished products is high

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