Method for implementing beam alignment and uniformization and optical device

Abstract

The invention discloses a method used for realizing beam collimation and uniformity, and the method comprises the following steps: the first surface of an optical element receives an input and divergent Gaussian beam, and diverges the beam, wherein the first surface has a spherical surface or an aspheric surface; and the second surface of the optical element resets the phase of the beam diverged by the first surface, and obtains a collimated and uniformly distributed flat top beam, wherein the second surface has an aspheric surface. The invention also discloses an optical element which adopts the least optical devices to finish the uniformity and the collimation of the diverged Gaussian beam, thereby avoiding the complex debug of the optical devices, and saving the use cost and the manufacturing cost.

Description

technical field [0001] The invention relates to the field of optics, in particular to a method for realizing beam collimation and homogenization and an optical device. Background technique [0002] With the increasing application of semiconductor lasers such as LD (Laser Diode, laser diode), LED (Light Emitting Diode, light-emitting secondary light), VCSEL (Vertical Cavity Surface Emitting Laser, vertical cavity surface emitting semiconductor laser), solid-state lasers and gas lasers , the homogenization of inhomogeneous beams, especially Gaussian beams, has become a very necessary problem in many application fields. Such as laser irradiation, ranging, free space optical communication, laser pumping, holography, coherent optical data processing, high resolution dynamic infrared radar system, laser drilling, laser marking, laser welding, laser photocopying and optical information technology, etc. Many fields of application require a uniform beam of light to illuminate the ta...

AI Technical Summary

Problems solved by technology

[0005] figure 1 , figure 2 or image 3 As shown in the system for realizing beam homogenization, the Gaussian beam input by this method is a collimated parallel beam, which needs to be collimated before input, and another collimation system is required, and adding a collimation system makes the original The system that requires multiple lenses or two high-order aspheric aspheric lenses to homogenize the beam is more complicated. The debugging process of such a large number of optical devices is very complicated, so it is easy to cause errors. At the same time The manufacturing cost and manufacturing difficulty of such an optical system are very high, and it is not easy to realize large-scale use

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