| 摘要 |
PROBLEM TO BE SOLVED: To provide a foam diffuser-reflector which has a precisely controlled bubble structure, with a high bubble fraction, includes numerous precisely controlled fine surface openings, and can offer extremely good diffusion and reflection performance.SOLUTION: This foam diffuser-reflector includes a foam body having a continuous bubble structure having through-holes between adjacent spherical bubbles, and has a plurality of 0.05 to 0.5-mm high projections on at least one side of the foam body. The foam diffuser-reflector is held between flat plates on the upper and lower sides thereof. The average value Ly of the shortest distance y between top ends of lateral surfaces of the projections next to each other is 0.5 mm or more when the foam diffuser-reflector is compressed by 5% in the thickness direction. The average pore diameter of the spherical bubbles is less than 20 μm. The average pore diameter of the through-holes is 5 μm or less. The surface of the foam body has surface openings having an average pore diameter of 20 μm or less. |
