亚微米精密对焦的超低成本智能手机显微镜研究OA

To address the core limitations of weak focusing capability and poor imaging quality in existing low-cost smartphone microscopes,this study aimed to construct an ultra-low-cost microscopic system that integrated submicron precision focusing and intelligent image enhancement.A compact optical path based on the 4-f principle was adopted,directly reusing the smartphone's native lenses to minimize hardware costs.Mechanically,a two-stage focusing mechanism consisting of an M3 bolt-nut pair for coarse adjust⁃ment and a T-shaped beam elastic structure for fine adjustment was designed to achieve wide-range,sub⁃micron-level(0.33 μm)focusing control.Algorithmically,an unpaired image translation(CUT)model based on contrastive learning was introduced to enhance image contrast and detail,compensating for the uneven illumination inherent in the simple setup.The experimentally constructed system has a total materi⁃al cost of only 32.43 yuan and a weight of 262 grams.The system achieved a spatial resolution of 2.46μm and a focusing sensitivity of 0.33 μm.The enhanced microscopic images showed a significant reduc⁃tion in the Frechet distance(59.7％improvement)of high-level feature distributions compared to images from a desktop microscope.This research successfully developed a very low-cost,portable smartphone microscope with submicron focusing capability,validating the effectiveness of the innovative paradigm of"precision elastic mechanics+intelligent compensation algorithms".It provides a feasible technical solu⁃tion for popularizing microscopic detection in resource-limited settings.