| Traditional imaging can only record two-dimensional information.Light field imaging technology is calculation and processing the acquired light field data to restore the visual information of the three-dimensional world,and compensate for the shortcomings of traditional imaging.Since the beginning of the 21 st century,light field imaging technology has made great progress.The light field imaging technique is performed based on the all-optical function as the theoretical basis for the study.The position and direction information of the target object’s ray is extracted,and the digital refocus,the reconstruct the target object’s three-dimensional information,and the depth reconstruction of the target object is realized.By the microlens array-based light field imaging technology,the microlens array is added as a light field modulation device to the traditional imaging system,which makes the light field imaging device in tendancy of portable and integrated.And the portability is enhanced through the current microlens manufacturing process.It has become mature already.The precision of microlens arrays produced is getting higher and higher,and the effect of light field imaging is getting better and better.Light field imaging technology has been widely used in many research fields.In this paper,the optical field imaging technology based on microlens array is analyzed and discussed theoretically.The light field acquisition and light field processing are deeply studied,which lays a theoretical foundation for subsequent simulation and experimental research.Combining two generations of light field cameras,the principle of light field imaging on the basis of microlens array is analyzed via computation calculation.Meanwhile,this paper proposes a “3ds Max”based microlens light field acquisition method,which uses the commercial software of the “3ds Max”to establish a 3D target model.By establishing a virtual microlens array,the microlens light field image can be obtained without crosstalk,high resolution and fast acquisition.It provides a high-efficiency simulation method for the research of light field imaging technology.The collected images are processed to reconstruct images from different perspectives.Then,the microfabrication technology of the microlens array was studied and analyzed.According to the parameters of the design and subsequent experiments,the photo-lithography technology is used to prepare the compliant microlens array.Andthe pattern transfer technology is used to destabilize the photoresist.The lens array structure is transferred to a stable microlens array structure on a quartz substrate.Finally,according to the simulation model of the “3ds Max”,using the microlens array which has been prepared,a light field imaging experimental system based on microlens array is built,and the light field imaging experiment system is used for the purpose of collecting the light field image.The image processing algorithm in the simulation model is programmed in Matlab software to process the acquired light field image,and the light field image reconstruction is also realized.Our experimental results are in good agreement to the simulation result.Finally,the contents of the full text are summarized,and the future research work is prospected. |
