In recent years, portable electronic devices—such as smartphones and tablets—have proliferated in modern life, driving rapid growth in the imaging systems integrated into these products. As technology advances, users’ expectations for the image quality of such devices continue to rise. Consequently, beyond ongoing improvements in optical design, portable imaging systems must also enhance their light‑blocking structures, improve assembly accuracy, and elevate overall imaging performance.

　　Typically, a light‑blocking film is placed between the lenses of imaging devices in portable electronic products to block excess light and prevent stray light from occurring. Conventional light‑blocking films rely on distinct groove patterns for orientation; however, these groove‑based identifiers can allow non‑imaging light to pass through, generating stray light on the image plane and degrading the imaging quality of the lens system.

　　Technical Field:

　　According to one aspect of the present application, a light-shielding sheet for an imaging lens is provided. The light-shielding sheet comprises a body having a first surface and a second surface opposite the first surface, as well as through-holes penetrating the body. A marking layer having a color different from that of the first surface is formed on the first surface; alternatively, a marking layer having a color different from that of the second surface is formed on the second surface.

　　According to the embodiments of this application, the thickness H1 of the marking layer may be less than or equal to 0.003 mm.

　　According to an embodiment of the present application, the marking layer may partially cover either the first surface or the second surface.

　　According to an embodiment of the present application, the body has a ring-shaped configuration, and the marking layer may extend in a direction perpendicular to the radial direction of the body by a distance of at least 0.05 mm.

　　According to the embodiments of this application, the area S of the marking layer may satisfy one of the following conditions with respect to the area S1 of the first surface or the area S2 of the second surface: S ≤ 2/3 S1; or S ≤ 2/3 S2.

　　According to the embodiments of this application, the distance H between the first surface and the second surface may satisfy 0.01 mm ≤ H ≤ 0.2 mm.

　　According to the embodiments of this application, the through-hole is formed with a single-sided chamfer, and the outer diameter D1 of the body and the minimum inner diameter D2 of the through-hole satisfy 0.25 mm ≤ (D1 − D2)/2 ≤ 3 mm.

　　According to the embodiments of this application, the through-hole is formed with a single-sided chamfer, and the outer diameter D1 of the body and the minimum inner diameter D2 of the through-hole satisfy 0.1 ≤ D2/D1 ≤ 0.9.

　　According to an embodiment of the present application, the marking layer is a colored strip bearing an identifiable pattern.

　　According to the embodiments of this application, the pattern may include elongated, triangular, circular, or star-shaped designs, among others.

　　According to another aspect of the present application, an imaging lens is provided, which comprises the aforementioned light-shielding member.