Laminated light shielding film for optical equipment, and light shielding ring, lens unit and camera module for optical equipment using the same

摘要

There are provided a multilayer light-blocking film and the like whose front and back surfaces are easy to discriminate while they have black light-blocking layers. A multilayer light-blocking film 100 has a multilayer structure comprising at least a substrate film 11, a black light-blocking layer 21 provided on one major surface 11a side of this substrate film 11, and a black light-blocking layer 31 provided on the other major surface 11b side. The black light-blocking layer 21 and the second black light-blocking layer 31 each have an optical density of 2.5 or more and a 60-degree glossiness of 5.0% or less, and the black light-blocking layer 21 has a 60-degree glossiness and/or a lightness L* different from the 60-degree glossiness and/or lightness L* of the black light-blocking layer 31. The substrate film 11 and the first black light-blocking layer 21 and/or the second black light-blocking layer 31 preferably have inclined end surfaces 12, 22, and/or 32 so that a film width increases from the first black light-blocking layer 21 toward the second black light-blocking layer 31.