1. https://www.excelitas.com/product/endoscope-optics-and-hd-objectives
2. Batch fabrication of micro-optical sensing and imaging devices;Wippermann,2013
3. Multi-aperture optics for wafer-level cameras
4. https://ams.com/en/miniature-camera-modules
5. https://www.ovt.com/products/#cameracubechip