Abstract: An an optical component includes a transparent rectangular solid portion having a height-to-width ratio greater than 1 in a plane perpendicular to an optical axis of the transparent rectangular solid portion, and a lens provided to the transparent rectangular solid portion at one or both of a light incident side and a light exit side of the transparent rectangular solid portion. The transparent rectangular solid portion and the lens form a lens body having a first surface that includes a flat contact surface. A perpendicular line drawn from the center of mass of the lens body to the flat contact surface is coincident with or close to a line segment connecting the center of the flat contact surface and the center of mass of the lens body in a predetermined range.

Abstract: A lens with a lens barrel includes a metal lens barrel, a glass lens disposed in the metal lens barrel, and a glass light absorber disposed between an inner perimeter surface of the metal lens barrel and an outer edge of the lens in a radial direction of the metal lens barrel. A first temperature range from a deformation point to a softening point of a first glass material constituting the lens and a second temperature range from a deformation point to a softening point of a second glass material constituting the light absorber overlap each other.