MULTILAYER LIGHT-BLOCKING FILM, AND LIGHT-BLOCKING RING FOR OPTICAL EQUIPMENT, LENS UNIT, AND CAMERA MODULE 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 light-blocking layers having high optical density whose front and back are usually difficult to discriminate. A multilayer light-blocking film 100 has a multilayer structure comprising at least a substrate film 11, a light-blocking layer 21 provided on one major surface 11a side of this substrate film 11, and a light-blocking layer 31 provided on the other major surface 11b side, the light-blocking layer 21 and the light-blocking layer 31 have an optical density of 2.5 or more in total, and the difference between the 60-degree glossiness of the light-blocking layer 21 and the 60-degree glossiness of the light-blocking layer 31 is 0.1% or more and 9.9% or less. The substrate film 11 and the light-blocking layer 21 and/or the light-blocking layer 31 preferably have inclined end surfaces 12, 22, and/or 32 so that a film width increases from the light-blocking layer 21 toward the light-blocking layer 31.