Abstract: The present invention provides a beaded rear projection screen that has performance properties such as gain and viewing angle that can be tuned by using a mixture of two or more types of microbeads having different refractive indices and varying the mixture. The present invention further provides methods of selecting microbeads and the construction of the screen so that transmission through the screen can remain sufficiently high throughout the range of tunability.

Abstract: A lenticular lens sheet that is bonded to a front faceplate and used in a rear projection type screen is disclosed. The lenticular lens sheet has a plurality of lenticular lenses arranged on one surface of a light-transmitting substrate, and projecting non-convergence parts arranged on the other surface of the light-transmitting substrate in positions different to positions of convergence of light from the lenticular lenses. An external light absorbing layer that absorbs external light is provided on a summit portion of each of the projecting non-convergence parts. Also, the lenticular lens sheet and the front faceplate are bonded together at the summit portions of the projecting non-convergence parts using an adhesive, and the width of adhesive layers formed through curing of the adhesive is less than the width of the external light absorbing layers. Consequently, the adverse effects caused by blockage of light are prevented.

Abstract: A lenticular screen component of a rear projection display screen has lenticular elements formed on a viewer surface. Identical lenticular elements cover the entire lenticular screen component and are repeated horizontally at a constant displacement. A given lenticular element includes a pair of reflective side portions and a refractive tip portion interposed between the side portions. One of the pair of side portions forms a sloped region at a joint between the one side portion and a side portion of an adjacent lenticular element. The sloped region is at an angle in a range between 5 and 15 degrees with respect to the first axis. The one side portion is covered with a reflective coating in at least a region of the one side portion that includes the joint. The pair of reflective side portions reflects light rays incoming from a projector towards the refractive tip portion for refracting the reflected light rays via a surface of the refractive tip portion facing a viewer.

Abstract: An optical system with improved color shift characteristics is described. Preferably, the system comprises a rear projection display that includes a light source providing light in first and second distinct polarization states, and a beaded screen.

Abstract: For providing a rear-projection type display apparatus, and a translucent type sheet for use therein, in particular, using an image modulation element, such as, a liquid crystal or a DMD (Digital Micro-mirror Device), etc.

Abstract: Provided is a light diffusion sheet capable of preventing the reflection of an external light that has entered from the light emission surface and of obtaining a high gain, and a projection screen using the light diffusion sheet.

Abstract: A luminaire for projecting an image comprises a housing (1) having a light emission window (2). The housing (1) accommodates a light source (3), an optical system (4) for directing light originating from the light source (3) along a longitudinal axis (5), and an image-forming surface (6) which is positioned orthogonally with respect to the longitudinal axis (5). According to the invention, the light source is a LED (3), and the optical system (4) comprises a collimating element (14) for collimating the light originating from the LED (3). Preferably, the luminaire comprises only one LED (3) which, during operation, has a luminous flux of at least 5 lm. Preferably, the housing (1) also comprises a focusing lens (15) for focusing the collimated light originating from the collimating element (14) on the image-forming surface (6) and, preferably, a projection lens (7, 7′) for projecting an image of the image-forming surface (6). Preferably, parts of the collimating element show total internal reflection.

Abstract: A transmission type screen is disclosed. The transmission type screen comprises a Fresnel lens sheet, a lenticular lens sheet provided with convex black stripes on the light-exit surface, and a diffusion sheet having an uneven surface on one side thereof. In the transmission type screen, the uneven surface of the diffusion sheet is joined to the lenticular lens sheet at the top portions of black stripes.

Abstract: A screen assembly that combines an angle re-distributing prescreen with a conventional diffusion screen. The prescreen minimizes or eliminates the sensitivity of the screen assembly to projector location. The diffusion screen provides other desirable screen characteristics. Compatible screen structures, along with methods for fabricating high resolution prescreens and methods and devices for maintaining the desired relationship between the prescreen and the diffusion screen are contemplated.

Abstract: This invention relates to a light transmitting filter comprising (a) light absorbing layer having a first and second surface, (b) microspheres embedded in the light absorbing layer and (c) an optically clear, substantially uniform, conformable layer covering the microspheres, wherein the microspheres provide light tunnels through the light absorbing layer. The invention also relates to methods of making the same. The invention also relates to a method of preparing a light transmitting filter comprising the step of laminating a clear substantially uniform conformable layer over transparent microspheres embedded in a light absorbing layer wherein the transparent bead form light tunnels through the light absorbing layer. The light transmitting filters of the present invention have improved light throughput and improved angularity.

Abstract: This invention is a lenticular lens sheet including an incidence plane that has a plurality of lens surfaces and an outgoing plane. A focal length at a center portion of each of the plurality of lens surfaces is longer. A focal length at an edge portion of each of the plurality of lens surfaces is shorter.

Abstract: A rear projection screen has one or more internal layers that reduce the speckle perceived by a viewer. A screen assembly has a light-source side and a viewing side. The assembly includes a screen layer to disperse light passing through the screen from the light source side and a matte surface disposed on the viewing side of the screen assembly to reduce ambient glare. A first speckle contrast reducing layer is disposed between the screen layer and the matte surface to reduce speckle formed at the matte surface.

Abstract: Screens for use with image-forming illumination (53,54) are provided, as well as methods for producing such screens. The screens include an array of lenses (51), a substrate, and a layer of light-absorbing material (55) in which apertures are formed using aperture-forming illumination (52) which passes through the lenses (51). The optical properties of the lenses (51) and the thickness of the substrate are selected so as to maximize the light-blocking area of the layer of light-absorbing material (55) while allowing long-wavelength image-forming illumination (54) to pass through the apertures substantially unimpeded. The array of lenses can be an array of randomized, anamorphic microlenses.

Abstract: A projection screen (30) for representation of images by back-projection comprises a plurality of holographic-optical elements (10) arranged in one plane. The holographic-optical elements are illuminated by a projector (14) comprising three projection devices (22,24,26). Each projection device (22,24,26) generates a light bundle (16,18,20) respectively including the chromatic components of an image to be projected. Each holographic-optical element (10) comprises at least one lens and one diffraction grating which are diffracted in such a manner by the different light bundles (16,18,20) that the holographic-optical element (10) will emit an exiting light bundle (28) with an identical exit angle (&bgr;) in the direction of the viewer (12). Such a projection screen will scatter the light only to a small extent so that the projection screen can be used also at daylight and for large-surface image projection.

Abstract: Eliminating occurrence of non-uniform vertical line patterns observable in image display apparatus with its associative projector device having its pixel structure in the horizontal direction. To this end, rear projection image display apparatus includes a screen including a lenticular lens sheet having its light incidence surface on which lenticular lenses (8) are periodically provided and a light exit surface having a substantially flat surface (9) at or near the focal position of each lenticular lens (8) on the light incidence surface. The lenticular lens sheet has a light absorption layer (10) provided in a region different from the focal position. The apparatus also includes a projector device having a periodical pixel structure for projecting an optical image onto the screen, such as liquid crystal display panels or the like.

Abstract: For providing a rear-projection type display apparatus, and a translucent type sheet for use therein, in particular, using an image modulation element, such as, a liquid crystal or a DMD (Digital Micro-mirror Device), etc.

Abstract: A rear projection screen including a plurality of refracting beads bound in optical contact with a substrate is disclosed. The beads are surrounded by an opaque matrix. A diffuser is positioned such that light traveling through the screen will pass through the diffuser after passing through the beads but before exiting the screen.

Abstract: A lenticular lens sheet having an entrance surface and an exit surface comprises a base part, an entrance lens part forming the entrance surface and having an array of a plurality of convex lens elements capable of gathering light rays. A tinted layer is formed at least in a portion of the entrance lens part near the entrance surface. A light absorbing layer is formed in light-nongathering regions in the exit surface in which light rays refracted by the convex lens elements do not gather.

Abstract: A light flux modulated by a picture is shot out from a liquid crystal projector, and projected on the rear surface of the transparent screen, and a user enjoys the picture from the front side thereof. The sawlike prismatic surface is formed on the rear surface of the transparent screen. Edges of the sawlike prismatic surface form concentric circles centering around a point which is given as an intersection of an optical axis of the projector and a downward extensions of the transparent screen. A face looking downward transmits the light flux incident thereon into the transparent screen efficiently on condition that an angle formed by the incident ray of light and the optical axis of the projector is greater than 40° and less than 90°. A face looking upward totally reflects the ray of light incident thereon to the light-shooting surface, if the aforementioned condition is satisfied.

Abstract: A lenticular lens sheet that is bonded to a front faceplate and used in a rear projection type screen is disclosed. The lenticular lens sheet has a plurality of lenticular lenses arranged on one surface of a light-transmitting substrate, and projecting non-convergence parts arranged on the other surface of the light-transmitting substrate in positions different to positions of convergence of light from the lenticular lenses. An external light absorbing layer that absorbs external light is provided on a summit portion of each of the projecting non-convergence parts. Also, the lenticular lens sheet and the front faceplate are bonded together at the summit portions of the projecting non-convergence parts using an adhesive, and the width of adhesive layers formed through curing of the adhesive is less than the width of the external light absorbing layers. Consequently, the adverse effects caused by blockage of light are prevented.

Abstract: A rear-projection screen 3, including at least a lenticular lens sheet 32 and a Fresnel lens sheet 31, is configured so that the lenticular lens sheet 32 contains, in a base material thereof made of a resin, light diffusing microparticles made of a resin having a refractive index different from a refractive index of the base material, and the light diffusing microparticles satisfy 0.5 &mgr;m≦&Dgr;N1×d1≦0.9 &mgr;m, where &Dgr;N1 represents a difference between a refractive index of the light diffusing microparticles and a refractive index of the base material of the lenticular lens sheet, and d1 represents an average particle diameter of the light diffusing microparticles. With this, a rear-projection screen with small wavelength dependency of diffusion characteristics can be provided utilizing only resins with general properties.

Abstract: Eliminating occurrence of non-uniform vertical line patterns observable in image display apparatus with its associative projector device having its pixel structure in the horizontal direction. To this end, rear projection image display apparatus includes a screen including a lenticular lens sheet having its light incidence surface on which lenticular lenses (8) are periodically provided and a light exit surface having a substantially flat surface (8) at or near the focal position of each lenticular lens (9) on the light incidence surface. The lenticular lens sheet has a light absorption layer (10) provided in a region different from the focal position. The apparatus also includes a projector device having a periodical pixel structure for projecting an optical image onto the screen, such as liquid crystal display panels or the like.

Abstract: A fixing device for fabricable rear projection-type multiscreens that increases the connecting strength of the screens and by minimalizes the space between adjacent screens. The connecting mechanism includes metal membrane-type connecting pieces that are less than 0.5 mm in thickness and are inserted between adjacent screens. Heat is then applied through the connecting pieces so the sides of the screens fuse together when the connecting pieces melt together. The connecting pieces are connected and fixed to partitioning plates with fixing bolts using fixing brackets.

Abstract: The screen proposed makes it possible, without spectacles, to view thousands of successive still or animated images, in three dimensions, using a screen that has no moving parts, is of simple design, and economic to manufacture. Applications of the present invention relate mainly to fixed displays for viewing by spectators who move relative to the screen, displays on moving surfaces for viewing by stationary spectators, electronic image displays, creating games and toys, etc.

Abstract: A novel system and method for viewing optical images with enhanced apparent depth is disclosed. The present invention utilizes the combined effects of a polarizing layer and a magnifying layer to achieve the enhanced apparent depth of the images being viewed. In a preferred embodiment, a polarizing layer is used in combination with a Fresnel layer having concentric circles to enhance the apparent depth of the images being viewed.

Abstract: Eliminating occurrence of non-uniform vertical line patterns observable in image display apparatus with its associative projector device having its pixel structure in the horizontal direction. To this end, rear projection image display apparatus includes a screen including a lenticular lens sheet having its light incidence surface on which lenticular lenses (8) are periodically provided and a light exit surface having a substantially flat surface (8) at or near the focal position of each lenticular lens (8) on the light incidence surface. The lenticular lens sheet has a light absorption layer (10) provided in a region different from the focal position. The apparatus also includes a projector device having a periodical pixel structure for projecting an optical image onto the screen, such as liquid crystal display panels or the like.

Abstract: A rear projection screen 10 comprises a Fresnel lens sheet 11 arranged on the projection side, and a lenticular lens sheet 12 arranged on the observation side. The Fresnel lens sheet 11 has a lenticular lens 11a for vertical diffusion on its light-entering side. The lenticular lens 11a for vertical diffusion contains a plurality of convex lenses which extend horizontally, and these plural convex lenses are arranged with a constant pitch. Further, the diffusion angle of the lenticular lens 11a for vertical diffusion continuously increases, and, at the same time, the direction of diffusion is gradually inclined to the central part side as the distance from the central part toward the edge side on the screen surface increases. The diffusion properties (the angle and direction of diffusion) of the lenticular lens 11a thus continuously vary between the central part and edge of the screen surface.

Abstract: A display system is provided including a display with a plurality of cells each adapted to emit a portion of an image. The display has a front face with a matrix of semi-spherical depressions formed therein. A bottommost point in each depression is centrally positioned above one of the cells of the display. A plurality of transparent spheres are positioned within the depressions for affording a visual effect.

Abstract: A projection screen assembly including a projection screen having an illuminated rear side and a light dispersing front side for showing an image with substantially homogeneous luminosity over a wide viewing angle. The light dispersing front side includes a plurality of closely positioned, substantially parallel and, in the use position of the screen, vertically extending lens elements including two inclined reflecting lens crests, and an intermediate lens. The projection screen is characterized by first and second reflecting rib lenses having planes of symmetry inclined toward each other or away from each other, respectively, and a third reflecting rib lens having a plane of symmetry which is normal to the plane of the screen. The use of a plurality of lenses that are approximately identical, but having different inclinations, provide enhanced homogenous luminosity.

Abstract: Provided is an optical device through which the angle of light passing and going out has little wavelength dependency and which is well applicable to Fresnel lenses with little coloration of light passing through it. The optical device has a diffraction grating formed on one surface and capable of diffracting rays of light incident thereon, and has a refracting member (e.g., a Fresnel lens) formed on the other surface opposite to the diffraction grating and capable of refracting the diffracted rays of light from the diffraction grating to make the refracted rays of light go out of it, in which the wavelength dependency of the diffractive angle of the main rays diffracted by the diffraction grating compensates for the wavelength dependency of the refractive angle thereof refracted by the refracting member, or that is, the former wavelength dependency is opposite to and cancels out the latter one.

Abstract: A brightness enhancement article that includes: (a) a transparent, flexible substrate; (b) a first major surface having an array of prisms with blunted or rounded peaks characterized by a chord width, cross-sectional pitch width, and radius of curvature in which the chord width is equal to about 20-40% of the cross-sectional pitch width and the radius of curvature is equal to about 20-50% of the cross-sectional pitch width; and (c) a second major surface characterized by a plurality of light scattering protrusions. The article has a haze value between about 20-60% and a transmission value no greater than about 94% when measured under conditions in which the first surface has a substantially planar topography.

Abstract: A screen assembly that combines an angle re-distributing prescreen with a conventional diffusion screen is disclosed. The prescreen minimizes or eliminates the sensitivity of the screen assembly to projector location. The diffusion screen provides other desirable screen characteristics. The prescreen is preferably formed by a collection of light transmitting and refracting elements, preferably spheres 80, partially embedded in a light blocking layer. Toward the back of the spheres 80 are effective apertures 82 where the light blocking layer 81 is absent or at least thinner than in other regions toward the side of the spheres. The projected image enters spheres 80 through the effective apertures 82, and exits the spheres 80 centered orientationally about the normal to the lens axis. The re-oriented light rays then enter the diffusion screen for viewing.

Abstract: A dispersing element for a rear projection screen assembly is sensitive to the polarization of the light passing through the element. In particular, the element disperses light having a first polarization differently from light having a second polarization orthogonal to the first polarization. The dispersing element may be aligned with a polarization axis neither parallel nor perpendicular to the polarization of the light passing through the element. The dispersing element may also be employed with a polarizer to remove unwanted light that propagates through the dispersing element. The dispersing element may also be rotatably mounted relative to a polarized light source so as to vary the angle between the polarization axis of the element and the polarization direction of the light.

Abstract: In a rear projector with a housing on whose front side is arranged a screen for displaying a video picture, with a brightness-modulated and color-modulated R-G-B light source for emitting a light bundle, with a deflecting device for scanning this light bundle, wherein the light bundle is deflected by the deflecting device over a total angle &agr; with respect to vertical scanning, and with a deflecting mirror which is located in the housing and arranged at an angle &dgr;, wherein the light bundle exiting from a real or virtual vertex of the total deflection angle &agr; is deflected onto the screen by the deflecting mirror, the virtual or real vertex located in front of the deflecting mirror lies at a location where the smallest angle &bgr; of the light bundle to the surface of the screen during deflection is less than 20° and the angle &dgr; is given by δ ≤ 45 ⁢ ° - α 4 + β

Abstract: An apparatus for optically circulating light beams between ports is disclosed, with a first port positioned at a proximal end of the apparatus, a second port positioned at a distal end of the apparatus, and a third port positioned at the proximal end of the apparatus. The first port is capable of transmitting a first light beam and the second port is capable of transmitting a second light beam. The apparatus includes a first beam bender. The first beam bender has opposing first and second faces. The first face and the second face are at an angle to one another. The first face and the second face intersect a longitudinal axis extending from the proximal to the distal end of the optical circulator. The beam bender is responsive to a polarization orientation of the first light beam to refract the first light beam toward the second port. The beam bender is further responsive to a polarization orientation of the second light beam to refract the second light beam toward the third port.

Abstract: A rear projection screen (1) comprising a lenticular structure (5) and a Fresnel structure (4). The Fresnel structure (4) has riser edges (9) and Fresnel facets (7). The Fresnel facets (7) are divided into two parts. The first part (11) encloses an angle .psi. with the plane of the projection screen. The second part (13) is substantially parallel to the plane of the screen. The Fresnel structure (4) and the lenticular structure (5) are fixed to each other at the second parts of the Fresnel structure.

Abstract: A rear projection screen which includes a front lenticular surface, a diffusion region behind the lenticular surface, a non-diffusion region behind the diffusion region, and a rear phase grating surface, when used with high magnification projection systems, exhibits reduced speckle when compared to other rear projection screen without such a grating.

Abstract: A lenticular lens sheet for use as a rear projection screen, includes a base lenticular lens sheet having a surface provided with a plurality of lenticular elements, and a surface diffusing part having minute diffusing elements. The surface diffusing part is combined with the base lenticular lens sheet by laminating a plastic film having one surface provided with the minute diffusing elements to the base lenticular lens sheet so that the minute diffusing elements lie on the surfaces of the lenticular elements or by embossing the minute diffusing elements in the surfaces of the lenticular elements of the base lenticular lens sheet with an embossing plastic film having a surface of a shape complementary to the minute diffusing elements.

Abstract: A rear projection type image display device includes a single projection lens, a Fresnel lens sheet, and a lenticular lens sheet 4 having black stripes in an area where when the light entered through the Fresnel lens sheet is transmitted, the outgoing light does not pass. When the angle (deg) of incidence to the lenticular lens sheet 4 is taken to be .theta., the total light transmittance (%) of the lenticular lens sheet to the light with the angle .theta. of incidence is taken to be Tt(.theta.), and the light transmittance loss by a light absorbent contained in the lenticular lens sheet is taken to be .alpha., as shown by (b), (c) in FIG. 4, in the central part of the lenticular lens sheet, if .vertline..theta..vertline.=5, the expression Tt(.theta.)>70.times.(1-.alpha.) is satisfied, and if .vertline..theta..vertline.=20, the expression Tt(.theta.)<50.times.(1-.alpha.) is satisfied.

Abstract: A transmission screen including a lenticular lens sheet having glass beads, having lenticular lenses, and a Fresnel lens sheet. Light is projected on the transmission screen by a projector, and an image made up of a large number of picture elements is thus projected onto the lenticular lens sheet. When the picture element pitch of the picture elements is designated by P, the arrangement pitch r of the lenticular lenses of the lenticular lens sheet is designated by r, and the particle diameter of the glass beads is designated by d, these P, r and d fulfill the following conditions: r/P.ltoreq.1/4.0 and 1.0 .mu.m.ltoreq.d.

Abstract: A lenticular lens sheet capable of reducing the color shift and improving the overall light beam transmittance. The lenticular lens sheet has an incident side lenticular lens on its light beam incident side surface and further has an emergent side lenticular lens on its emergent side surface, with peak portions of the emergent side lenticular lens being formed at substantially convergent positions of the incident side lenticular lens. When an inter-lens distance at the sheet central portion is taken to be t.sub.0 and an inter-lens distance of an end portion of an viewable area of a rear-projection screen composed of this lenticular lens sheet is taken as t.sub.1, the rate of the inter-lens distances t.sub.0 and t.sub.1 is determined to satisfy 0.98.ltoreq.t.sub.1 /t.sub.0 .ltoreq.1.10.

Abstract: A rear projection screen assembly including a screen that is illuminated from behind by at least two image sources, and that has a front side having light dispersing elements for reception of light beams from the image sources in order to display an image with a mainly homogeneous luminosity over a wide viewing angle. The light dispersing elements are defined by a number of closely positioned, substantially parallel, vertically running lens elements, where the lens elements include a number of triangular lenses arranged in pairs of two, each triangular lens having two side faces and a symmetry plane. The symmetry planes of the two triangular lenses for each pair are symmetrically inclined with respect to each other and to a normal of the plane of the projection screen.

Abstract: A rear projection screen includes a lenticular lens sheet integrally having a clear layer not containing any diffusing agent, disposed on a light receiving side and having a plurality of lenticular lenses arranged in rows, and a diffusing layer containing a diffusing agent, disposed on a light emitting side and having a plurality of lenticular lenses arranged in rows. The ratio in thickness of the diffusing layer to the lens sheet is in the range of 50% to 70%. The rear projection screen disperses G-light rays traveling perpendicularly through the rear projection screen to a higher degree than light rays of other colors to reduce the gain in order that the uniformity of light intensity distribution on the surface of the rear projection screen as viewed from a position directly in front of the rear projection screen is improved.

Abstract: A permeable image display screen having a lenticular lens sheet including a plurality of semi-cylindrical lens portions and a plurality of non-focusing portions. The lens portions are arranged in parallel with spaces on a side of an image light emission surface of the lenticular lens sheet and contain diffusion particles for diffusing image light incident from an image light incidence surface of the lenticular lens sheet. Each of the non-focusing portions, through which the image light does not pass, is arranged on the side of the image light emission surface and between two adjacent lens portions. A glossy permeable layer is provided on the image light emission surface of the lenticular lens sheet.

Abstract: A transmission type projection screen comprises a plurality of sheets. The front sheet nearest to the front observation side is an ambient light attenuating front sheet which is provided on its surface facing the rear side with first prism lenses formed by successively and horizontally arranging unit triangular prisms. Each unit triangular prism has a sharply inclined surface inclined at an angle of about 90.degree. to the surface of the front sheet, and a gently inclined surface inclined at an angle in the range of 5.degree. to 40.degree. to the surface of the front sheet. The first prism lenses are disposed with the gently inclined surfaces of the unit triangular prisms thereof facing upward. Second prism lenses may be provided on its surface facing the front observation side, each of the second prism lenses also having a sharply inclined surface and a gently inclined surface.

Abstract: A holographic screen of a rear projection type for use in a projector for transmitting projection light received from a rear end of the projector onto a viewing surface. The holographic screen includes a holographic sheet including a viewing surface for forming the received projection light into an image viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, and a plurality of scattering protrusions formed over the entire viewing surface for scattering the received projection light, and a plurality of light absorbers formed between the plurality of protrusions, for absorbing ambient light incident to the viewing surface. Thus, an image with improved contrast is displayed on a viewing surface of the holographic screen.

Abstract: A projection screen having a construction well-suited for effecting lateral color constancy in rear screen projection display systems is disclosed. The projection screen includes a holographic transmission diffuser element capable of diffusing a beam of light into a horizontally-elliptical cone and a light-collimating element for uniaxially-collimating by transmission an expanding wavefront with the axis of collimation substantially orthogonal to a horizontal viewing axis. The use of the projection screen in a rear screen projection display system including red, green and blue image projectors is also disclosed. A method of manufacturing a holographic projection screen by drawing a holographic transmission diffuser web and a uniaxial light collimating web into overlapping relationship and bonding the webs is also disclosed.

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 lenticular lens sheet for a rear projection television, which exhibits smooth color change and has a wide viewing angle even in a television set having a large convergence angle. A group of vertical straight-line shaped entrance-side lens surfaces are provided on an entrance side I of the lenticular lens sheet. Each entrance-side lens surface has a cross-section defined approximately by a part of an ellipse, and satisfies the condition of 2.5.ltoreq.bp/a.sup.2 .ltoreq.3.0, where b is the major axis of the ellipse; a is the minor axis of the ellipse; and p is the width of each entrance-side lens surface. A group of vertical straight-line shaped exit-side lens surfaces are provided on an exit side O of the lenticular lens sheet. Each exit-side lens surface has a cross-section defined approximately by a part of an ellipse, and satisfies the condition of 0.55.ltoreq.b/(a.sup.2 .phi.).ltoreq.0.75, where .phi. is a convergence angle formed by two adjacent projection tubes.

Abstract: A lenticular lens sheet includes a substrate layer, a lens portion having a lenticular lens configuration which is shaped so as to be convex on a light incident face side of the substrate layer and an achromatic or chromatic colored layer formed adjacent to at least a light incident face of the lens portion. The substrate layer is not colored. Alternatively, it is colored thinner than the colored layer. With the arrangement, it is possible to restrict reflection of outside light and enhance the contrast of picture without reducing the intensity of image light so much. Further, it is possible to realize fine pitching of images.