Abstract: An image display device includes an aggregate of convex lenses arranged on a surface thereof with a predetermined lens pitch Px in at least one direction Dx (in which x is a suffix representing the direction); and a display unit displaying a plurality of element images on a focus surface of the convex lenses or near the focal plane surface in a manner aligned along the surface to thereby display the element images aligned in the direction Dx with an image pitch wx different from the pitch Px. By using the image display device, a moiré stripe formed by shift in pitches between a plurality of convex lenses and a plurality of element images is stereoscopically displayed as an image or displayed as an image of animation, and the element images are composed of an aggregation of a plurality of parallax or frame component images.

Abstract: An active energy ray-curable composition comprising (A) 20 to 80 parts by weight of a compound represented by the following general formula I: wherein R1 represents hydrogen or methyl, X and Y may be the same or different and represent methyl, chlorine, bromine or iodine, and t and u each independently represent an integer of 0-2, (B) 20 to 80 parts by weight of at least one compound having at least one acryloyl or methacryloyl group in the molecule, or (B-1) 10 to 90 parts by weight of at least one compound having at least two acryloyl or methacryloyl groups in the molecule and (B-2) 1 to 90 parts by weight of at least one monoacrylate or monomethacrylate compound having one acryloyl or methacryloyl group in the molecule, and (C) 0.

Abstract: An active energy ray-curable composition comprising(A) 20 to 80 parts by weight of a compound represented by the following general formula I: ##STR1## wherein R.sup.1 represents hydrogen or methyl, X and Y may be the same or different and represent methyl, chlorine, bromine or iodine, and t and u each independently represent an integer of 0-2,(B) 20 to 80 parts by weight of at least one compound having at least one acryloyl or methacryloyl group in the molecule, or (B-1) 10 to 90 parts by weight of at least one compound having at least two acryloyl or methacryloyl groups in the molecule and (B-2) 1 to 90 parts by weight of at least one monoacrylate or monomethacrylate compound having one acryloyl or methacryloyl group in the molecule, and(C) 0.

Abstract: A random polarized light from a light source (305) can be changed into a linear polarized light by using a polarization beam splitter (303), a transmitting means (304) for rotating a plane of polarization at 90.degree., reflectors (308) and a first prism formed plate (302). Further, a beam width of the linear polarized light thus obtained can be reduced by using a reflecting surface (307) and a second prism formed plate (301).

Abstract: An optical imaging device for projecting an image in a strip area, comprising a reflecting plate having a plurality of pairs of reflecting surfaces arranged on a flat surface and forming an array in a first direction parallel to a long direction of a strip image, and at least one cylindrical focusing lens or mirror having a focusing power directed only to a second direction perpendicular to the first direction. The pair of reflecting surfaces is composed of two flat surfaces which cross at about a .pi./2 radian, and the crossing line of two adjacent reflecting surfaces is perpendicular to the first direction. The reflecting plate projects the image component in parallel to the first direction and the cylindrical focusing lens or mirror projects an image component perpendicular to the first direction. The resolving power in the first direction of the obtained image is determined by the pitch length of the pair of reflecting surfaces.

Abstract: An optical device for forming a linear polarized light by dividing a light beam from a light source into two linear polarized light components, and rotating a plane of polarization of one of the light components at 90.degree. to follow joining of both the light components. Further, a polarization beam splitter for dividing a light beam into two linear polarized light components is employed in such an optical device.