Typical Applications of Microlens Arrays
The microlens array is the core wavefront-segmentation component of a Shack-Hartmann wavefront sensor, which measures a wavefront by calculating shifts in focal-spot positions. The wavefront sensing system supports high-precision, nondestructive, online wavefront inspection in research and industrial processing, including semiconductor manufacturing, aerospace, and ophthalmology. The sensor structure leaves gaps between photosensitive elements, causing substantial loss of incident optical energy. A microlens array focuses light that would otherwise fall into these gaps onto the photosensitive elements, greatly improving optical-energy utilization. Matching a microlens array with a field lens provides rich, high-volume image data. Subsequent algorithms can reconstruct image information at multiple depths of field, enabling continuous spatial data acquisition. Interaction between microlens arrays and microstructured patterns enables acquisition and reconstruction of three-dimensional images, supporting technologies for packaging, anti-counterfeiting, 3D printing, stereoscopic billboards, three-dimensional film and television, and stereoscopic pictures.
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