COMPOSITION FOR LIGHT SCATTERING BODY FORMATION, LIGHT SCATTERING BODY, SHEET-LIKE LAMINATE, PROJECTION SCREEN, AND IMAGE DISPLAY SYSTEM

To achieve both transparency and clearness of a projection image on a projection screen at high level.SOLUTION: A light scattering body 10 contains a resin medium 3 containing a resin, a first particle 1 which is dispersed in the resin medium 3 and has a median diameter of 50 nm or more and 360 nm or less, and a second particle 2 which is dispersed in the resin medium, has a median diameter of 500 nm or more and 1.5 μm or less, and has a diamond structure, in which the total content of the first particle and the second particle is 0.01 pts.mass or more and 20.0 pts.mass or less based on 100 pts.mass of the resin medium, a particle number ratio M/Mof a particle number Mof the first particles to a particle number Mof the second particles is 100 or more and 5,000 or less, and the total light transmittance of the light scattering body is 80% or more.SELECTED DRAWING: Figure 1 【課題】投影スクリーンにおける透明性と投影画像の鮮明性とを高水準で両立する。【解決手段】本発明の光散乱体１０は、樹脂を含む樹脂媒体３と、樹脂媒体３中に分散している、メジアン径が５０ｎｍ以上３６０ｎｍ以下である第１の粒子１と、樹脂媒体中に分散している、メジアン径が５００ｎｍ以上１．５μｍ以下であり、ダイヤモンド構造を有する第２の粒子２とを含有する光散乱体であって、第１の粒子及び第２の粒子の合計含有量が、樹脂媒体１００質量部に対して、０．０１質量部以上２０．０質量部以下であり、第１の粒子の粒子数Ｍ１と第２の粒子の粒子数Ｍ２との粒子数比Ｍ１／Ｍ２が、１００以上５０００以下であり、光散乱体の全光線透過率が８０％以上である。【選択図】図１