THE STEREOSCOPIC DIAGRAM |
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| Abstract: | AbstractWheatstone in 1838 published for the first time his remarkable discovery of Stereoscopy. To himself he had put the question, “What would be the visual effect of simultaneously presenting to each eye instead of the object itself its projection on a plane surface as it appears to that eye?” A preliminary experiment in which four objects were combined to form two resultant images at once sufficed to confirm his expectation and to demonstrate the phenomenon of synthetic solidity, to which he gave the name Stereoscopy He then proceeded to explain his discovery by means of a diagram based upon a more elementary experiment involving the formation of a single resultant image. Hitherto this experiment has been universally accepted, not only on account of the plausibility of its application, but because the movements described by Wheatstone can generally be readily seen when the experiment is repeated. These movements were regarded by Wheatstone as being of a stereoscopic character. It is the purpose of this discussion to show that the second experiment in no way represents the phenomenon of Stereoscopy, and that any diagram based upon this second experiment cannot afford a correct explanation of the stereoscopic principle. |
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