A mobile terminal, comprising: one or more camera components located inside the mobile terminal, each of the one or more camera components comprising a lens having a circular viewing angle, and each of the one or more camera components having a field of view, and the field of view being within the circular viewing angle; and a sheet that covers the one or more camera components, the sheet comprising a light-transmitting region and a light-shielding region, the light-shielding region surrounding the light-transmitting region, and the field of view intersecting with the sheet to form intersections located in the light-transmitting region; wherein the light-transmitting region comprises edge contour lines comprising first straight line segments and first arc line segments connected to each other, the first straight line segments being located in a circle in which the first arc line segments are located, and the first straight line segments being at least partially located within the circular viewing angle; wherein the one or more camera components comprise a sensor that has a square viewing angle, a portion where the circular viewing angle and the square viewing angle overlap forms the field of view, and the sensor is used for imaging; characterized in that there are two of the first straight line segments, and the two first straight line segments are arranged opposite one another; wherein there are two of the first arc line segments, and the two first arc segments are arranged opposite one another; wherein ends of each of the first straight segments are directly connected to ends of the first arc segments such that the first straight segments and the first arc segments are alternately connected to one another; wherein the intersections form a square structure with four corners being curved, and the intersections comprise two second straight line segments, two third straight line segments, and four second arc segments; wherein the two second straight line segments are arranged opposite one another, the two third straight line segments are arranged opposite one another, and each of the second arc segments is connected between one of second straight line segments and one of the third straight line segments which are adjacent to one another; wherein the second straight line segments overlap with the first straight line segments, and the second arc segments overlap with the first arc segments; wherein all of the square viewing angle formed by the sensor is within the light-transmitting region, a part of the circular viewing angle is within the light-transmitting region, and the other part of the circular viewing angle is outside the light-transmitting region. one or more camera components located inside the mobile terminal, each of the one or more camera components comprising a lens having a circular viewing angle, and each of the one or more camera components having a field of view, and the field of view being within the circular viewing angle; and a sheet that covers the one or more camera components, the sheet comprising a light-transmitting region and a light-shielding region, the light-shielding region surrounding the light-transmitting region, and the field of view intersecting with the sheet to form intersections located in the light-transmitting region; wherein the light-transmitting region comprises edge contour lines comprising first straight line segments and first arc line segments connected to each other, the first straight line segments being located in a circle in which the first arc line segments are located, and the first straight line segments being at least partially located within the circular viewing angle; wherein the one or more camera components comprise a sensor that has a square viewing angle, a portion where the circular viewing angle and the square viewing angle overlap forms the field of view, and the sensor is used for imaging; characterized in that there are two of the first straight line segments, and the two first straight line segments are arranged opposite one another; wherein there are two of the first arc line segments, and the two first arc segments are arranged opposite one another; wherein ends of each of the first straight segments are directly connected to ends of the first arc segments such that the first straight segments and the first arc segments are alternately connected to one another; wherein the intersections form a square structure with four corners being curved, and the intersections comprise two second straight line segments, two third straight line segments, and four second arc segments; wherein the two second straight line segments are arranged opposite one another, the two third straight line segments are arranged opposite one another, and each of the second arc segments is connected between one of second straight line segments and one of the third straight line segments which are adjacent to one another; wherein the second straight line segments overlap with the first straight line segments, and the second arc segments overlap with the first arc segments; wherein all of the square viewing angle formed by the sensor is within the light-transmitting region, a part of the circular viewing angle is within the light-transmitting region, and the other part of the circular viewing angle is outside the light-transmitting region.