Large-field-of-view double-cascaded variable focus lens capable of eliminating monochromatic aberration and design method thereof

Abstract

The invention provides a large-field-of-view double-cascaded variable focus lens capable of eliminating monochromatic aberration and a design method thereof, and can effectively eliminate monochromatic aberration in a large field of view. The large-field-of-view double-cascaded variable focus lens capable of eliminating monochromatic aberration, to which the invention relates, is characterized bycomprising quartz glass, a first nano brick array structure and a second nano brick array substrate, wherein the first nano brick array structure is formed on the surface of one side of the quartz glass and used for correcting aberration of the lens in the large field of view; the second nano brick array substrate is formed on the surface of the other side of the quartz glass and used for implementing focusing of parallel beams; both the first nano brick array structure and the second nano brick array substrate are formed by periodically arranging nano brick units; and the nano bricks are of acuboid shape and a length, a width and a height of each nano brick unit are sub-wavelength sizes. The large-field-of-view double-cascaded variable focus lens provided by the invention has the advantages of small volume, low cost, light weight and simple design thought, and is very suitable to apply to a micro photoelectric system.

Description

technical field [0001] The invention belongs to the fields of micro-nano optics and polarization optics, and in particular relates to a monochromatic aberration-eliminating large field of view double-cascade zoom lens and a design method thereof. Background technique [0002] The zoom lens group plays a pivotal role in military reconnaissance, infrared detection imaging, or mobile phone SLR photography and other fields. Compared with the continuous zoom optical system, the double-speed zoom system has smaller axial size, higher transmittance, and easier installation and adjustment, and has replaced the continuous zoom system in some applications. The zooming method of the double-speed zoom optical system is divided into two types: cut-in zooming method and axial moving zooming of the lens group, both of which realize compensating optical zooming through the mechanical movement of the lens group. Therefore, such a dual-speed zoom optical system requires precise optical desig...

AI Technical Summary

Problems solved by technology

Therefore, such a dual-speed zoom optical system requires sophisticated optical design, and requires a larger optical system to provide conditions for aberration compensation, which limits the application of zoom optical systems in micro-optical systems

[0003] The metasurface dual-speed zoom lens based on circular polarization control can better solve the disadvantages of the traditional double-speed zoom lens. However, because each metasurface array is only designed for a specific incident situation, it cannot be used very well Eliminate off-axis aberrations

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