Res 1988-111 - Laserfiche WebLink

Home Browse Search

Reflect background images 600 to 1600x brighter than conventional white screens #7610 High Gain Sheeting #7615 High Contrast Sheeting SCREEN 0,- Y ` I I I CAMERA SUBJECT SCREEN (, I \ /SUBJECT { \\ c Lighting may be directed as desired, but is preferably I placed outside shaded area. Lights directed toward subject 21, from within shaded area may reduce background color contrast. t PROJECTOR PROJECTOR SPUTTER BEAM•SPLITTER F\ill CAMERA Retro-reflective Special Effects Projection Screens return a higher portion of the light striking the screen back to its source, producing images 600 to 1600x brighter than conventional white screens. In special effects systems, a projector sends out a light image. Some of the light bounces off a beam splitter (a partially silvered mirror), onto the screen then returns directly back to the mirror which transmits a portion of the light into the camera lens. 98-0439-4843-3(28.5)11 High Gain and High Contrast screens reflect an image that is uniform in intensity across the screen-even light reflected from the corners of a screen covered with Scotchlite is approximately the same intensity as light reflected from the screen's center. The remaining light transmits through the uncoated mirror and catches in a light trap. The camera lens, directly in line with the reflected screen light, picks up the high intensity image. Because screens covered with Special Effects Projection material are all extremely reflective, shadows from foreground figures are hidden and no projected images appear on the front of foreground subjects. Equipment needs, lighting, etc., vary with individual user requirements. Generally best results are obtained it the projector and camera are on the same axis. Litho in U.S.A 3M Industrial Optics Project Building 220-7W-06, 3M Center St. Paul, MN 55144 E?a