Патент USA US2133121код для вставки
Oct. 11, 1938. ‘ R. I. STEARNS. 2D ' 2,133,121‘ STEREOSCOPIC SCREEN AND M-ETHOD‘OF STEREOSCO‘PIC VISION Filed April 2, 1936 v lnzrerzi'o'r Richard I ?z‘earvzp'lf Patented Oct. 11, 1938 2,133,121 UNITED STATES PATENT OFFICE 2,133,121 STEREOSCOPIC SCREEN AND METHOD ‘ . STEREOSCOPIC VISION Richard I. Stearns, II, Chicago, 111. Application April 2, 1936, Serial’ No. 72,363 2 Claims. (CI. 88-29) This invention relates to a new and improved method of, obtaining stereoscopic vision from stereoscopic pictures. The stereoscopic pictures may comprise ?at objects formed by the partial covering of one object by another. The per ception of depth is believed to be due to the dif i) position in a frame to form a stereoscopic screen. One of the strips 2 is carefully adjusted to re ?ect light receivedv from the center of ‘the mir ror ‘I to the position of the right eye 8,'the re mainder of the mirror being covered so as notv to re?ect light. Then each one of the narrow ference between the retina images on the two . strips 2, which as shown, forms the front sec tion of the ‘screen, is set to re?ect similarly from The well known and simple method of making the same line on the mirror ‘I to the eye 8. The a stereoscopic picture visible to several people ‘e?ect'of the combined re?ecting strips is that of simultaneously is to provide offset left-eye and a concave mirror having for its focus the posi-. right-eye pictures of different colors, one over tion of the eye 8. It will be apparent that in the other, and giving each observer spectacles order to obtain concave mirror results; the re of different colors for each eye. ?ecting strips must be very narrow and the ad Attempts to use prisms or diffraction gratings justment of each strip very exact. In a similar have not proved practical for group stereoscopic manner the re?ecting strips 3 forming the rear effects. section of the stereoscopic screen are each ad vMy invention comprises the use of an illumi justed-to focus on the left eye 9. nated screen placed between the observers and When a red light or a red colored ?lm'is used the stereoscopic picture by means of which the to illuminate the screen from the right side, the observers’ will simultaneously receive three-di right eye will see a red color; with blue illumi mensional effects. nation on the screen from the left side the left An illustrative embodiment of my invention. eye sees a blue color, the amount of color im is shown in the accompanying drawing in which: parted to the screen in either case being just The ?gure is a diagrammatic drawing showing enough to be equivalent to- looking through a the position of the stereoscopic screen through spectacle of the same color as that of the respec which the picture is seen and the path of the rays tive screen. If the re?ecting strips have been of re?ected light that is mixed with light reach set to obtain an offset of color focus substantially ing the eyes from the picture. equivalent to the distance between the eyes, 8 By my invention the use of different colored and 9, then practically the entire surfaces of the‘ glasses, one for each eye, is eliminated and the two ?xed mirrors ‘I and.- I 0 may be uncovered, same or equivalent results are obtained by plac and the division of color observed by covering ing near the stereoscopic picture I a transparent ?rst one eye and then the other will be quite screen made up of re?ecting surfaces 2, which marked over a wide range at the positions of re?ect only light received from the right side, the eyes 8 and 9. When the eyes are moved to and similar re?ecting surfaces 3 which re?ect the left the re?ecting angle to the right eye is only light received from the left side. A colored reduced with‘ an equal change of the incident source of light or lamp 4 is placed at the focus angle, but the color remains the‘ same. In a of a curved mirror 5, and the substantially paral similar manner with respect to the left eye the lel rays 6 are re?ected from a plane mirror ‘I re?ected angle is increased and the angle of to the re?ecting surfaces 2 shown in sectionin the incident ray is also increased. In operation, the diagram. The re?ecting surfaces 2 are trans after the stereoscopic screen is adjusted and illu parent strips of Celluloid, glass or the like, and minated, the stereoscopic picture I, which may are each carefully adjusted to‘ the plane or angle comprise overlapping left-eye and right-eye whereby the re?ected rays of light will converge stereoscopic pictures in red and blue respectively, on the right eye 8. > is ?ooded with white light and is viewed through In a similar manner rays from a second source the ‘stereoscopic screen, with the red and blue -of light are caused to converge on the left eye color values on the screen adjusted to separate 9 by the re?ection from the transparent strips the overlapping pictures. The effect is somewhat 3 which receive light from the plane mirror ill the same as though a red glass or screen were by way of the curved mirror H from the second placed in front of one eye and a blue glass or source of light l2, placed at the focus of the screen were placed in front of the other eye. curved mirror H. The amount of color required on the stereoscopic In the assembly of my apparatus the narrow screen to obtain resultsequal to the use of red transparent strips 2 are individually placed in and blue spectacles is surprisingly small. eyes, as in the use of binocular instruments. 10 , 20 25 3,0 35 40 45 10 15' 20 25 35 45 50 ‘ 2 ,2,1ss,121- , Experience has'proved that the‘ relative in recting blue light-solely to the left eye of the ' ' .tensity of the colored lights as compared with. observer to dominate the blue image rays of the . the stereoscopic picture illumination, to obtain blue picture for that eye and not the red image the best stereoscopic results,‘ is easily controlled. raysoi' the red picture. ' a _ 2. The method of obtaining stereoscopic effects 1 Although but one set of re?ected rays is shown in the diagram it wilt beapparent that‘ adjacent . ‘which ‘consists in ?ooding overlapping left-eye and right-eye stereoscopic pictures in- comple mentary colors with-light and directing light quite a wide range of'positions at which the ob- ~ from both pictures to the left and right eye pol, ' rays will be offset as to spacing to the observer andthat the visible stereoscopic resultscover' server may bei'located. -'sitions for the eyes of an' observer, directing 10 ' light of the. color of the left-eye picture solely to the right eye of the observer of the picture to fects which consists in ?ooding overlapping red . 'dominate the image rays coming to that eye left-eye and blue right-eye stereoscopic pictures g from the left-eye picture and not the image rays with white light- and'directing light from both‘ of the right-eye picture, and simultaneously di 15 pictures to bothathe left and right eye positions recting light 01 the color of the right-eye pic for the eyes of an observer, directing- red light ture solely to the ‘left eye of the observer to v solely‘ to the right eye of the observer of .the‘ dominate the image rays coming to the left eye 'picture to dominate the red‘ image rays of the from the right-eye pictureiand not the image I claim: __ . > . 1. The method of obtaining stereoscopic ef is red picture for that eye and not the blue image rays of theblue picture, and simultaneously di rays of the left-eye picture. ' r , - RICHARD I. STEARNS, II.