David Brewster developed a stereoscope with lenses and a binocular camera in 1844. Wheatstone also approached Joseph Plateau with the suggestion to combine the stereoscope with stereoscopic photography. The stereoscope was first invented by Sir Charles Wheatstone in 1838. The first stereoscope was invented by Wheatstone in 1838. Autostereograms are similar to normal stereograms except they are viewed without a stereoscope. In 1840, Sir Charles Wheatstone developed the stereoscope. Another design combined two zoetropes with Wheatstone's reflecting stereoscope in between. The viewer looked through a stereoscope to converge the two images. Some of the earliest stereoscope views, issued in the 1850s, were on glass. In 2014, Google released the template for a papercraft stereoscope called Google Cardboard. In September, she signed a contract with Universal Music Sweden and Stereoscope Scandinavia. Another form of "etoki" was the Japanese modified stereoscope imported from the Netherlands. Later in October 2008, CCC's Project Blinkenlights went to Toronto, Ontario, Canada with project Stereoscope. A simple stereoscope is limited in the size of the image that may be used. Second, the two films or plates of the same region were viewed under a stereoscope.