An optical lens, comprising: a first lens component comprising a first lens sheet group, the first lens sheet group comprising at least one first lens sheet; a second lens component comprising a second lens barrel and a second lens sheet group mounted in the second lens barrel, the second lens sheet group comprising at least one second lens sheet, wherein the first lens sheet group and the second lens sheet group together constituting an imageable optical system, wherein the second lens barrel has an outer top surface and an inner top surface, and the second lens sheet group bears against the inner top surface; and a first glue material arranged between the outer top surface and a bottom surface of the first lens component, the first glue material being suitable for supporting and fixing the first lens component and the second lens component after curing, so that a relative position of the first lens component and the second lens component is maintained at a relative position determined by Active Alignment, characterized in that the outer top surface comprises a glue spreading surface suitable for arranging the first glue material and an extension surface formed by extending from the glue spreading surface to a central axis of the second lens barrel, and the glue spreading surface is farther from the central axis than the extension surface, and the first lens sheet is located above the glue spreading surface and the extension surface, wherein there is a transition surface between the glue spreading surface and the extension surface, and the transition surface extends downwardly from the glue spreading surface to connect the extension surface, wherein there is a first thickness from the glue spreading surface to the inner top surface, there is a second thickness from the extension surface to the inner top surface, and the first thickness is greater than the second thickness. a first lens component comprising a first lens sheet group, the first lens sheet group comprising at least one first lens sheet; a second lens component comprising a second lens barrel and a second lens sheet group mounted in the second lens barrel, the second lens sheet group comprising at least one second lens sheet, wherein the first lens sheet group and the second lens sheet group together constituting an imageable optical system, wherein the second lens barrel has an outer top surface and an inner top surface, and the second lens sheet group bears against the inner top surface; and a first glue material arranged between the outer top surface and a bottom surface of the first lens component, the first glue material being suitable for supporting and fixing the first lens component and the second lens component after curing, so that a relative position of the first lens component and the second lens component is maintained at a relative position determined by Active Alignment, characterized in that the outer top surface comprises a glue spreading surface suitable for arranging the first glue material and an extension surface formed by extending from the glue spreading surface to a central axis of the second lens barrel, and the glue spreading surface is farther from the central axis than the extension surface, and the first lens sheet is located above the glue spreading surface and the extension surface, wherein there is a transition surface between the glue spreading surface and the extension surface, and the transition surface extends downwardly from the glue spreading surface to connect the extension surface, wherein there is a first thickness from the glue spreading surface to the inner top surface, there is a second thickness from the extension surface to the inner top surface, and the first thickness is greater than the second thickness.