a, Conical microlens on an optical fibre. b, Top view of the ACEcam. c, Photograph of an assembled ACEcam. d, Concept of image formation. e, Fabrication process flow of conical microlens optical fibres.

a, Combined image of a laser spot from nine angles. b, Image of the logo of The Hong Kong Polytechnic University. c, Schematic of an experimental setup to verify the nearly infinite depth of field of ACEcam. d, Images of the letters 'HK'. e, Images of the circle and triangle patterns. f&g, Optical flow as the ACEcam is translated and rotated. h, Experimental setup to generate very high angular velocities. i, Response signals of the photodiodes when the LEDs are driven by square waves.