3D GLASSES IN WORLD WAR II.

3D GLASSES IN WORLD WAR II. My friend Bob Jordan remarked to me that the role of small technological advantages in World War II had not received enough recognition. Soon after our conversation, he sent me this article from BBC news about the use of 3D glasses in reading aerial photographs to locate V-1 and V-2 production sites in Germany. The British used 3D and the Germans did not, and it made a big difference. The 3D glasses were similar to those used in watching 3D movies today. The photographic operation relied on tens of millions of aerial photographs of Germany. The 3D glasses enabled the photographic interpreters to determine heights of structures. The photographs were especially useful in Operation Crossbow, which delayed and disrupted the German V-1 and V-2 rocket programs. I knew a lady (Alice Sheldon) who was a photographic interpreter for the American counterpart of the British unit. The American unit also used 3D glasses. She had been selected because of her eyesight. She said it was always startling to see the before and after photos of sites she had identified for bombing.