The invention provides an image sensor which includes a visible light receiving unit and an infrared light receiving unit. The visible light receiving unit is configured to receive visible light, andthe infrared light receiving unit is configured to receive infrared light. The visible light receiving unit includes a color filtering sphere layer for collecting the visible light. In some embodiments of the invention, the infrared light receiving unit includes an infrared light penetrating filtering sphere layer for collecting the infrared light. In some other embodiments of the invention, the infrared light receiving unit includes a white filtering sphere layer for collecting the infrared light.