ABSTRACT
Digital cameras use a photosensor system that is a focal plane array (FPA) of either a charge coupled device, charge injection device or complementary metal-oxide semiconductor type, with various types of chip architecture to provide a digitized output, including full frame transfer, interline transfer, interlaced and progressive scan types. Digital camera design is evolving, with unusual and innovative arrangements regularly introduced for consumer appraisal. The autofocus system of a digital camera is linked to an internal focusing arrangement using the output phase data from the FPA, as this is the basis of autofocusing systems in other non-digital cameras. Digital cameras of conventional single-lens reflex design use a mirror reflex finder and pentaprism with displays for status, mode and autofocus zones. Various viewfinder systems are used in digital cameras. Relay systems may also be used to optically couple a digital camera to other systems, such as to a camera eyepiece or microscope to provide remote viewing capabilities.
