Research On Design Optimization Of Distributedmulti-Aperture Optical Imaging System

As a new type of photoelectric detection equipment,the distributed multi-aperture optical imaging system offers advantages such as simultaneous detection of multi-dimensional information,small size,and high precision.There will be an increasing role for it in modern military technology,industrial manufacturing technology,and other areas as well.Developed as a form of distributed multi-aperture imaging,light field imaging is becoming increasingly sophisticated.Using light field imaging technology,all-optical cameras can capture four-dimensional light field information,which has been widely used in industry.In contrast,traditional light field imaging systems exhibit low resolution,a shallow depth of field,and poor imaging quality.The paper proposes a distributed multi-aperture light field imaging system as a means to improve the resolution and extend the depth of field.This paper examines the structural design and optimization of an optical imaging system with distributed multi-aperture apertures.Considering the principles and characteristics of light field imaging,a distributed multi-aperture light field imaging system is designed and studied in detail.To address the low resolution of traditional light field imaging systems,a focused light field imaging system is developed.In order to improve the depth of field,a new four-focal square microlens array structure was designed,using sub-microlens with aspheric optimization for better imaging quality.A platform for distributed multi-aperture light field imaging was constructed to verify the system’s functionality.The basic principles of distributed multi-aperture optical imaging systems are discussed in this paper,along with the key technologies of focused light field imaging,including parametric representation based on light field,light field information acquisition based on microlens array,and light field refocusing and other technologies.In addition to its theoretical basis,it lays the groundwork for the design of the distributed multi-aperture optical imaging system.A distributed multi-aperture optical imaging system is designed and investigated in detail,with structural parameters and performance indicators analyzed.We provide an overall solution to the system design and simulate the system imaging through geometric bitmap analysis using Zemax software.There is no problem with the simulation results,and the theoretical scheme is viable.To optimize the imaging system,we propose a structure with four focal squares and closely arranged microlens arrays.In comparison with the single-focal microlens array structure,the depth of field of the system is increased 6.57 times,while pixel utilization is higher.By optimizing the design of the aspheric pair microlens,the imaging system can achieve higher image quality.The new structure we designed was simulated using the mixed sequence mode inZemax.According to the simulation results,the system is able to refocus different targets at different positions and achieve the design goal of expanding depth of field in imaging.In the end,we select devices and build an experimental platform for distributed multi-aperture optical imaging system.In the image processing algorithm,the light field image is acquired,and the refocus and super-resolution reconstruction are carried out.The image’s spatial resolution is fourfold increased after reconstruction.It has been shown through simulations and experiments that a distributed multi-aperture optical imaging system provides greater depth of field,better resolution and better imaging quality.It can also allow for the distributed extraction of light field information,which is beneficial to future research on distributed imaging systems.