Abstract: A plurality of source data frames is input into a processor. The plurality of source data frames is sectioned into a plurality of sections which are mapped to form a plurality of pre-distort images. The plurality of pre-distort images is compensated for variations in the degree of saturation (Diffraction Efficiency) to reduce ghosting and compressed to form a plurality of holographic elements, which are recorded onto a holographic recording medium to form a holographic stereogram.

Abstract: A magnetic shield (20) for a cathode ray tube includes a body portion and a skirt section (21) around the body portion. The skirt section (21) has a skirt portion (23) having a free edge (25) and being connected to the body portion at its opposite edge (26), wherein the length of the free edge (25) is less than the length of the opposite edge (26).

Abstract: A color selection mechanism for a color CRT includes a frame to which a color selection electrode thin plate is to be applied, and a color selection thin plate. The surface of the frame to which the color selection electrode thin plate is to be applied is formed from a face represented by a first and a second function in a longitudinal direction from the center axis of the frame. The surface is leftwardly and rightwardly symmetrical with respect to the center axis.

Abstract: A sliding base 7 is supported over main guide shaft 27 and auxiliary guide shaft 28, and has first and second bearings 31 and 32 supported on the main guide shaft 27, and a third bearing 33 supported on the auxiliary guide shaft 28. The third bearing 33 has a fulcrum P3 thereof positioned on a straight line L1 connecting a middle point P4 connecting fulcrums P1 and P2 of the first and second bearings 31 and 32, and a center of gravity G1 of the sliding base 7 supporting an optical block 5 and objective lens drive 6 thereon. Thus, sliding base 7 can be presented from being vibrated.