US 12,015,838 B2
Light shielding plate, camera unit, and electronic device
Kiyoaki Nishitsuji, Tokyo (JP); and Shinichi Shimamura, Tokyo (JP)
Assigned to TOPPAN INC., Tokyo (JP)
Filed by TOPPAN INC., Tokyo (JP)
Filed on Jan. 13, 2022, as Appl. No. 17/574,859.
Application 17/574,859 is a continuation of application No. PCT/JP2020/027893, filed on Jul. 17, 2020.
Claims priority of application No. 2019-134036 (JP), filed on Jul. 19, 2019; application No. 2019-134037 (JP), filed on Jul. 19, 2019; application No. 2019-134038 (JP), filed on Jul. 19, 2019; application No. 2019-167431 (JP), filed on Sep. 13, 2019; application No. 2019-167432 (JP), filed on Sep. 13, 2019; and application No. 2019-167433 (JP), filed on Sep. 13, 2019.
Prior Publication US 2022/0137270 A1, May 5, 2022
Int. Cl. H04N 23/55 (2023.01); C23C 16/30 (2006.01); C23F 1/02 (2006.01); G02B 1/113 (2015.01); G02B 5/00 (2006.01); H04N 23/50 (2023.01); H04N 23/51 (2023.01)
CPC H04N 23/55 (2023.01) [C23C 16/30 (2013.01); C23F 1/02 (2013.01); G02B 1/113 (2013.01); G02B 5/005 (2013.01); H04N 23/50 (2023.01); H04N 23/51 (2023.01)] 11 Claims
OG exemplary drawing
 
1. A light shielding plate made of metal, comprising:
a front surface located on a light incident side;
a rear surface facing away from the front surface; and
an aperture penetrating through the front surface and the rear surface, wherein
the aperture includes a first aperture portion and a second aperture portion connected to the first aperture portion via a central opening, the first aperture portion extending from a rear opening in the rear surface toward the central opening and having a shape tapered from the rear surface toward the front surface, the second aperture portion extending from a front opening in the front surface toward the central opening and having a shape tapered from the front surface toward the rear surface, the front opening being larger than the rear opening; and
when an image of an edge of the central opening is captured in a radial direction thereof by bringing the edge into focus under imaging conditions where a depth of field is 0.4 μm, a maximum focusable length of the light shielding plate that can be in focus in a thickness direction thereof is 7.0 μm or less.