光学
共焦
显微镜
色差
材料科学
色阶
针孔(光学)
共焦显微镜
物理
作者
Shaobai Li,Bofan Song,T.W. Peterson,J. C. Hsu,Rongguang Liang
出处
期刊:Optics Letters
[The Optical Society]
日期:2021-05-24
卷期号:46 (11): 2722-2722
被引量:13
摘要
In this Letter, a microLED-based chromatic confocal microscope with a virtual confocal slit is proposed and demonstrated for three-dimensional (3D) profiling without any mechanical scanning or external light source. In the proposed method, a micro-scale light-emitting diode (microLED) panel works as a point source array to achieve lateral scanning. Axial scanning is realized through the chromatic aberration of an aspherical objective. A virtual pinhole technique is utilized to improve the contrast and precision of depth reconstruction. The system performance has been demonstrated with a diamond-turned copper sample and onion epidermis. The experimental results show that the microLED panel could be a potential solution for portable 3D confocal microscopy. Several considerations and prospects are proposed for future microLED requirements in confocal imaging.
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