LIGHT-SHIELDING PLATE ADAPTED TO LENS
A light-shielding plate adapted to a lens is provided, which includes a light-shielding body, a light through hole penetrating through a center of the light-shielding body and at least one identification region penetratively disposed at a periphery of the light-shielding body. One of the at least one identification region includes a straight edge located at a boundary of the light-shielding body. The light-shielding plate satisfies: Rs/R≧0.8, where R is a radius of the light-shielding body, and Rs is the shortest distance between the identification region located closest to the light through hole and a circle center of the light through hole.
1 . A light-shielding plate adapted to a lens, comprising:
a light-shielding body;
a light through hole, penetrating through a center of the light-shielding body; and
at least one identification region, penetratively disposed at a periphery of the light-shielding body, wherein one of the at least one identification region comprises a straight edge located at a boundary of the light-shielding body,
wherein the light-shielding plate adapted to the lens satisfies:
Rs/R≧ 0.8,
wherein R is a radius of the light-shielding body, and Rs is a shortest distance between the identification region located closest to the light through hole and a circle center of the light through hole.
2 . The light-shielding plate adapted to the lens as claimed in claim 1 , wherein the light-shielding plate adapted to the lens satisfies: R−Rs≦0.4 mm.
3 . The light-shielding plate adapted to the lens as claimed in claim 2 , wherein the light-shielding plate comprises two identification regions penetratively disposed at the periphery of the light-shielding body, and an included angle between directions from the center of the light-shielding body to the identification regions is not equal to 180 degrees.
4 . The light-shielding plate adapted to the lens as claimed in claim 2 , wherein one of the at least one identification region comprises a short straight edge located at a boundary of the light-shielding body and a long straight edge connected to the short straight edge and the light-shielding body, and a length of the long straight edge is longer than a length of the short straight edge.
5 . The light-shielding plate adapted to the lens as claimed in claim 2 , wherein one of the at least one identification region comprises a pair of short straight edges located at a boundary of the light-shielding body and spaced from each other and a long straight edge connected to the short straight edges through two ends thereof, and a length of the long straight edge is longer than a length of each of the short straight edges.
6 . A light-shielding plate adapted to a lens, comprising:
a light-shielding body;
a light through hole, penetrating through a center of the light-shielding body; and
at least one identification region, penetratively disposed at a periphery of the light-shielding body,
wherein the light-shielding plate adapted to the lens satisfies:
Rs/R≧ 0.8,
R≦ 3 mm, and
R 0 ≦1.5 mm,
wherein R is a radius of the light-shielding body, Rs is a shortest distance between the identification region located closest to the light through hole and a circle center of the light through hole, and R 0 is a radius of the light through hole.
7 . The light-shielding plate adapted to the lens as claimed in claim 6 , wherein the light-shielding plate comprises two identification regions penetratively disposed at the periphery of the light-shielding body, and an included angle between directions from the center of the light-shielding body to the identification regions is not equal to 180 degrees.
8 . The light-shielding plate adapted to the lens as claimed in claim 6 , wherein one of the at least one identification region comprises a straight edge located at a boundary of the light-shielding body.
9 . The light-shielding plate adapted to the lens as claimed in claim 6 , wherein one of the at least one identification region comprises a short straight edge located at a boundary of the light-shielding body and a long straight edge connected to the short straight edge and the light-shielding body, and a length of the long straight edge is longer than a length of the short straight edge.
10 . The light-shielding plate adapted to the lens as claimed in claim 6 , wherein one of the at least one identification region comprises a pair of short straight edges located at a boundary of the light-shielding body and spaced from each other and a long straight edge connected to the short straight edges through two ends thereof, and a length of the long straight edge is longer than a length of each of the short straight edges.