基於非球面超穎透鏡陣列的微型高空間解析光場相機(3/3)

This project is aimed to develop a miniature light-field camera module with a highspatial resolution based on an aspherical metalens array. The traditional lightfieldcamera utilizes a microlens array to re-image to obtain the field angle anddepth information of objects. However, the microlens array will reduce the spatialresolution while obtaining the field angle and depth information. To enhance thespatial resolution, we will develop a non-periodically segmented aspherical micro-/millimeter- metalens hybrid meta-device. Each micro-/millimeter- metalens, withfree-form phase distribution, has a different diameter but with the same focallength. The millimeter-metalens in the center is used to obtain images with highspatial resolution while the outer micro-metalenses are used to obtain field angleand depth information. The manufacturing of this kind of microlens/microlenshybrid device is very challenged for traditional microlens fabrication processes.Therefore, we will fabricate this meta-device based on metalens technology. Themillimeter-metalens at the center is utilized to capture the high spatial resolutionimage. Finally, a prototype of a miniature light field camera with high spatialresolution will be delivered.In summary, this project is a three-year one. In the first year, we will deliver alight-field camera module for the cellphone. The optical performance will bemeasured. In the second year, a low aspect-ratio metasurface unit cell will bedesigned and fabricated. Based on the low aspect-ratio metasurface unit cell, ametalens array will be fabricated and measured. In the final year, a light-fieldcamera module with a high spatial resolution (> 2M pixels) will be delivered.