Motion Picture Herald (Mar-Apr 1945)

:es to be illuminated is provided by lighter troughs, cove strips, plaques, etc., or any ,er means which conceals the source of light ".Jrj-pi the eyes by opaque reflectors. The walls ceiling should always be of a light finish ; !|i even with the most reflective finish of these itbs, the efficiency of this system is consider-rcUr lower than that of a direct system. Howijjr, the absence of shadows and glare, and l| even distribution of the light, especially • v£re an elaborate decorative scheme of light":t jj is desired, offsets for many parts of a atre its lower efficiency. The third system is semi-indirect; most of i light is directed to the walls and ceiling, -' a |le a small amount is diffused through the TU-jure glass or louvres. This system is used u te extensively in the larger theatres because s soft and appealing to the eye, while the ":.:kure does not show up as an unpleasant, "otrfk spot against, say, a light background (a • isideration particularly important in the --crditorium). In the semi-indirect system, fix e shadow can be avoided by throwing some it on the underside. The semi-indirect I tern is slightly more efficient than an int ect system. ACING OF OUTLETS In determining the spacing of light sources ia direct lighting system, the outlets should i located in the centers of squares or equal "j4;pas on the ceiling. The greater the number ,1 light sources, the more uniform the illu. ^nation -will be. Care should be used in ..Lnning the directions in which the light will . J] thrown in order to have maximum absence ,-Xglare. In this type of lighting, the illumina»uLn will be more uniform, as a rule, if the ilht fixtures are installed at the greatest 1 .ght possible in the auditorium. ..Ji Also for indirect as well as for semi-indirect :., iijhting, the outlets and fixture should be . -ated at the centers of equal areas. Since '. .Ijectional glare is less likely with these sysJjps, larger and fewer fixtures can be used , Tin in the case of direct lighting. The fixj jEtes should not be too close to the reflecting jtface — about 2 feet away is likely to be a ~ \ itance giving uniformity of illumination. . .xie position of a fixture should also be deterTjned, of course, from an artistic point of ."••]• :w> and globes or reflectors be selected that ■ | Ql throw most of the light upon the reflecti \k surface without concentrating the light, • ,ierwise illumination will not be uniform. FLECTINQ SURFACES AND FIXTURES ■>-, ;frFor effective diffusion of reflected light, -. -unite, ivory, off-white (or eggshell), or light :5if.ff colors are good. In finishing, dull finishes ould be employed rather than glossy. The :ter may reflect an image of the fixture. Semi-indirect fixtures should always be indied directly above the areas where the aximum amount of light is desired. They ould not be so close to the side walls of the | jditorium, however, as to cause light spots panel mouldings. Whenever the ceiling is divided by beams, d the panels have decorations, these areas -•ould be more brightly illuminated in order . stand out. If the panels are boxed in with ep beams, the light fixture should be located i the center, and where several small panels e to be covered by one light fixture, all j tures should be located on the beams rather (Continued on page 26) TWINS to COUNT ON... For Glamorizing Hollywood's Best j • * H To reproduce Hollywood's finestphotography and sound at its glamorous best demands mastery in projection comparable with the photography and recording utilized in its filming. New DeVRY precision performance twins enable you to reproduce Hollywood's masterpieces in black and white or technicolor on your screen the way your audiences want them — faithful to tone and color, camera composition and sound. 4 Time Winner DeVRY alone hasbetn awarded four consecutive Army-Navy E'l for Excellence in the production of Motion Picture Sound Equip Because new DeVRY 35mm Motion Picture Projectors are the best that warborn engineering know-how, technical knowledge and skilled craftsmanship can produce, they are the most economical projection booth equipment you can buy. Before you buy, mail the coupon to DeVRY. DeVRY has the world' s most compete peacetime line o f motion picture sound equipment, including HI-Fidelity power amplifiers and speakers. DeVRY CORPORATION, Dept. BT-B3 1111 Armitage Ave., Chicago 14, Illinois Please send details about the NEW DbVRY 35mm Theater Projectors and Sound Systems. The time is not yet for thinking we need not SAVE THAT CARBON and TURN IT IN ^^^^^^^^^^^^^^^^^ ^she Seal of Readership Originators and Exclusive Manufacturers of NOISELESS CURTAIN TRACKS, CONTROL EQUIPMENT, SPECIAL OPERATING DEVICES. ALL-STEEL CURTAIN TRACKS AUTOMATIC CURTAIN CONTROL VALLEN, INC., AKRON, OHIO % TTER THEATRES, MARCH 3, 1945