See-through layered body, transparent screen comprising same, and image projection device comprising same
[Problem] Provided is a see-through layered body which allows obtaining a projection type image display transparent screen with a wide viewing angle, and excellent image clarity and transparency. [Solving means] A see-through layered body according to the present invention comprises an intermediate resin film, two transparent substrates holding the intermediate resin film, wherein the intermediate resin film comprises a resin and from 0.0001 to 15% by mass of microparticles, having an average diameter of from 1 nm to 100 μm, and the center plane average roughness SRa of outermost surfaces on both sides of the layered body is from 0.05 to 5.5 nm.
1. A transparent screen comprising a see-through layered body comprising an intermediate resin film and two transparent substrates holding the intermediate resin film, wherein
the intermediate resin film comprises a resin and from 0.0001 to 15% by mass of microparticles based on the resin, having an average diameter of from 1 nm to 100 μm,
a center plane average roughness SRa of outermost surfaces on both sides of the layered body is from 0.05 to 1.0 nm, and
an image clarity of the layered body is 70% or higher when measured by using an image clarity measuring device with an optical comb having a width of 0.125 mm.
2. The transparent screen according to claim 1 , wherein the microparticles are selected from the group consisting of zirconium oxide, titanium oxide, aluminum oxide, magnesium oxide, cerium oxide, barium titanate, barium sulfate, calcium carbonate, silica, aluminum, silver, platinum, gold, titanium, nickel, tin, indium, diamond, tin-cobalt alloy, zinc sulfide, metal-coated mica, metal-coated glass, acrylic beads and styrene beads.
3. The transparent screen according to claim 1 , wherein the microparticles have a content from 0.001 to 2% by mass based on the resin and an average diameter of from 10 nm to 5 μm.
4. The transparent screen according to claim 1 , wherein a total light transmittance of the layered body is 65% or higher.
5. The transparent screen according to claim 1 , wherein a haze value of the layered body is 35% or less.
6. The transparent screen according to claim 1 , wherein a thickness of the layered body is from 10 μm to 100 mm.
7. The transparent screen according to claim 1 , wherein the layered body further comprises a transparent substrate.
8. The transparent screen according to claim 1 , wherein the transparent screen is a reflection type transparent screen.
9. The transparent screen according to claim 1 , wherein the transparent screen is a transmission type transparent screen.
10. The transparent screen according to claim 1 , wherein the microparticles are flake-form microparticles having an average aspect ratio of from 3 to 800.
11. The transparent screen according to claim 1 , wherein the microparticles have a content from 0.0001 to 0.04% by mass based on the resin.