International projectionist (Jan 1959-Dec 1960)

Unique Kodak 3-D Projection System ANEW three-dimensional technique for studying air turbulence has been developed by Kodak scientists. Part of studies designed to improve cameras and film for taking pictures at long range, the new 3-D technique can pinpoint moving pockets of air that deviate light rays and interfere with aerial and similar long-distance photography. The pockets of air under study by the Kodak research team are from four inches to six feet in diameter. The air pockets have a temperature a fraction of a degree higher or lower than the surrounding air. As a result they have a refractive index different from the rest of the air. This deviates some of the light rays and causes fuzziness of the image in long-distance photographs. Because wind causes movement of the air pockets, watching their images on a screen is like looking at a waterfall sideways. At lonely Canadice Lake, N.Y., the scientists set up two high-intensity light sources focused on a screen 1.3 miles across the north end of the lake. Consistent Maximum Light of Greater Economy DIAMOND PROJECTION 70 PINE STREET • NEW YORK 5, NY BOOKS ON ELECTRONICS from John F. Rider Publisher, Inc. WORLD FAMOUS FOR TECHNICAL EXCELLENCE! Learn the "picture-book" way! You can master the basics of electricity, electronics or television with these easy "learn-bypictures" courses. Hundreds of bold, dramatic, informative, specially prepared illustrations make ideas easy to understand. There is one idea to a page with at least one big illustration to make the text crystal-clear. Step-by-step explanations let you learn as slowly or as quickly as you like. Study at home ... no teachers ... no correspondence. It's the easiest way to learn the fundamentals of electricity, electronics and television. 1. BASIC ELECTRICITY, Soft Covers, 5 volumes, 624 pp., Only $10.00 per set 2. BASIC ELECTRONICS, Soft Covers, 5 volumes, 550 pp., Only $10.00 per set both by VanValkenburgh, Nooger, Neville, Inc. 3. BASIC TELEVISION, by Alexander Schure, Ph.D., Ed. 0. Soft Covers. 5 volumes, 688 pp., Only $10.00 per set 4. HOW TO READ SCHEMATIC DIAGRAMS by David Mark covers the symbols and abbreviations used in schematic diagrams related to the electronics field. Starts with individual components and carries through to complete receivers and similar equipment. Components and circuits are not only identified, but also explained — making this a short course in electronics. Soft Cover, 160 pp., illus., Only $3.50 5. HOW TO USE METERS by John F. Rider explains in detail the construction and operation of all types of electrical meters. Gives the details of what kinds of meters to use for making different kinds of measurements and tells you where to connect the meters. Soft Cover, 144 pp., illus., Only $2.40 6. STEREOPHONIC SOUND by Norman H Crowhurst can save you hundreds of dollars by guiding you to the choice of the right stereophonic equipment for home use. Covering all the main systems, this book explains theory and tells you how to get the most listening pleasure from the various systems. It guides you in selecting loudspeakers and other components. Also, it discusses stereo systems and techniques used for motion pictures. Soft Cover, 128 pp., illus.. Only $2.25 7. BASIC PHYSICS by Alexander Efron, E.E., Ph.D, makes physics self-teachable. A unique, classroom-tested "spiral" approach, mature analytical explanations, clear illustrations and other learning aids make it possible for you to master this intermediate-level physics course through home study. This course is modern, rigorous, complete and balanced. It covers everything from the contributions of early Greek philosophers to satellites. Questions and problems let you test yourself as you go along. Mastery of BASIC PHYSICS gives you the firm foundation you need for advanced technical studies. Cloth Bound, 2 vols, in single binding, 724 pp., illus., Only $7.60 CLIP COUPON AND MAIL IT TODAY! r INTERNATIONAL PROJECTIONIST 19 West 44th Street, New York 36, N. Y. Please send me a copy of the books I have circled below. (I enclose payment.). 12 3 4 5 6 7 Name Address City A State Each of the light sources was polarized with a filter. Behind the screen, designed for rear projection, stood an observer wearing a pair of spectacles like those once used to view 3-D movies. 1.3-Mile Look — See Into Space A pattern of "shadows" in constant motion appeared on the screen, with each of the light sources producing a shadow of the pocket in a different place on the screen. The observer with the 3-D glasses could thus "'look into" the space between the screen and the light source^ — getting an effect of depth — and judge the distance of each pocket from the screen. Knowing the distance between the light sources and the distance between the shadows appearing on the screen, the scientists were able to calculate through triangulation the distance of the disturbances from the screen. The Kodak scientists also took pictures of the screen images by holding a large piece of film directly in front of the screen, and using a shutter on one distant light source. B&L's Big-Lens Design For Stock Exchange Members of The New York Stock Exchange are taking a brand new look at the ticker tape these days. Recently, Bausch & Lomb Optical Co. designed and manufactured a giant projection lens which has been installed at the Comparison between the mammoth-size B&L projection lens used at N. Y. Stock Exchange and the lens (left) used in the B&L slide projector. Stock Exchange's Wall Street (N.Y.) headquarters. The new lens is the heart of a projection system for showing ticker tape quotations and bids on a screen. The lens allows data on the standard %-inch tape to be projected 106 feet across the Exchange floor onto a large wall screen. The individual letters and figures are 2 feet high and the section of the tape is magnified to 14 feet long, making statistics easily legible from all areas in the room. Since the actual moving tape is automatically fed directly 24 INTERNATIONAL PROJECTIONIST FEBRUARY 1959