Lens barrel-equipped lens and light source device

Abstract

A lens barrel-equipped lens includes a lens disposed on a light-emitting side of a light source; a lens barrel configured to retain the lens; and a half mirror attached to the lens barrel and disposed to face the lens that is between the half mirror and the light source. The lens includes a first lens surface facing the light source and a second lens surface facing the half mirror. A light-focusing portion is provided in a region of the first lens surface outward of an effective range of the first lens surface where light of the light source transmits, and the light-focusing portion is configured to focus light that is reflected by the half mirror and re-transmits through the lens, toward the light source.

Dependencies are inferred from the claim text.