Patent ID: 11936972
Assignee: TOPPAN HOLDINGS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC C  H  G | IPC C  G  H

Claim 0:
1. A light shielding plate made of metal, comprising:
a front surface located on a light entry side;
a rear surface facing away from the front surface; and
a hole extending through between the front surface and the rear surface, wherein
the hole includes a first hole portion and a second hole portion connected to the first hole portion at a center opening, the first hole portion extends from a rear surface opening in the rear surface to the center opening and is tapered in shape from the rear surface toward the front surface, the second hole portion extends from a front surface opening in the front surface to the center opening and is tapered in shape from the front surface toward the rear surface, and the front surface opening is larger in size than the rear surface opening, and
a ratio of a distance between the front surface and an edge of the center opening to a distance between the rear surface and the edge of the center opening in a thickness direction of the light shielding plate is greater than or equal to 2.5.