Optical lens, optical lens molding die and manufacturing method thereof

Abstract

The present invention relates to an optical lens, an optical lens forming mold and a manufacturing method thereof, wherein the optical lens includes a helical surface spiraling around an axial direction and an intermediate structure wound by the helical surface, and the intermediate structure is opposite to the helical surface Extending axially toward one side, the helical surface goes around to form a first-order difference. The forming mold is correspondingly complementary to the structure of the optical lens. The manufacturing method of the molding die includes the following steps: providing a base body, the base body includes a processing surface; processing the processing surface to form a spiral surface, an intermediate structure and a step difference of the molding die. The optical lens, the optical lens forming mold and the manufacturing method thereof provided by the invention have the advantages of simple structure, simple manufacturing process, uniform dispersion of light beams, good processing precision and favorable miniaturization.

Description

technical field [0001] The invention relates to an optical lens, an optical lens molding die and a manufacturing method thereof. Background technique [0002] Optical fiber communication has the advantages of good transmission efficiency, resistance to electromagnetic interference and high stability. Optical fiber can be divided into single-mode optical fiber and multi-mode optical fiber according to the transmission mode. The diameter of multi-mode optical fiber is much larger than the wavelength of the beam, so it allows beams of different wavelengths and phases to continuously reflect and transmit along the surrounding wall of the optical fiber. After long-distance transmission There will be a difference in propagation speed between different modes, resulting in modal dispersion and excessively high light flux in the center of the fiber, thereby limiting the transmission distance. [0003] In order to solve the aforementioned problems, a vortex phase plate is generally u...

AI Technical Summary

Problems solved by technology

However, the vortex phase plate is not easy to manufacture, and the conventional optical communication module needs to assemble multiple optical elements to complete the layout of the optical path. The slight deviation of the installation position of each optical element will greatly affect the transmission path of the optical path, and it is difficult to accurately The alignment and processing are not easy and the quality is different, which leads to poor transmission effect

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