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The concept of digitizing images on scanners, and the concept of digitizing video signals, predate the concept of making still pictures by digitizing signals from an array of discrete sensor elements. [[Eugene F. Lally]] of the [[Jet Propulsion Laboratory]] published the first description of a mosaic photosensor in 1961.<ref>[[Eugene F. Lally]], [http://members.cox.net/aldebaran66/documents/Lally_mosaic_guidance-OCR-2.pdf "Mosaic Guidance for Interplanetary Travel,"] ''Space Flight Report to the Nation'', pp. 2249–61, [[American Rocket Society]], [[New York]], October 9–15, 1961.</ref>
 
Texas Instruments engineer [[Willis Adcock]] designed a filmless camera and applied for a patent in 1972, but it is not known whether it was ever built.<ref name="digicamhistory_1970s">U.S. patents 4057830 and 4163256 were filed in 1972 but were only later awarded in 1976 and 1977. {{cite web|url=http://www.digicamhistory.com/1970s.html|title=1970s|accessdate=2008-06-15}}</ref> The first recorded attempt at building a digital camera was in 1975 by [[Steven Sasson]], an engineer at Eastman Kodak.<ref>{{cite web | url = http://www.womeninphotography.org/Events-Exhibits/Kodak/EasyShare_3.html | work = Women in Photography International | title = Digital Photography Milestones from Kodak | accessdate = 2007-09-17}}</ref> It used the then-new solid-state CCD [[image sensor]] chips developed by [[Fairchild Semiconductor]] in 1973.<ref>{{cite book | title = The Focal Encyclopedia of Photography | edition = 4th ed. | author = Michael R. Peres | url = http://books.google.com/books?id=VYyldcYfq3MC&pg=RA1-PA16&dq=sasson+ccd+fairchild&ei=sDAFR-7YA46ApwLuvYijDQ&ie=ISO-8859-1&sig=FHJgLcIA9OrCgLxeJGpanGnMs8o | publisher = Focal Press | year = 2007 | isbn = 0240807405 }}</ref> The camera weighed 8 pounds (3.6&nbsp;kg), recorded black and white images to a cassette tape, had a resolution of 0.01&nbsp;megapixels (10,000 pixels), and took 23 seconds to capture its first image in December 1975. The prototype camera was a technical exercise, not intended for production.
 
 
===The arrival of true digital cameras===
[[File:Capas-d1.jpg|thumb|Nikon D1 digital camera of 1999]]