Patent ID: 7773144
Filing Date: 2010-08-10
Classification: G02B,H04N

Abstract:
1. A lens device, comprising: a photographic lens having an optical axis; a half mirror on the optical axis, the photographic lens being on a light incident side of the half mirror; wherein the lens device is connected to a first camera on a light transmitting side of the half mirror and connected to a second camera on a light reflecting side of the half mirror, and object light transmitted through the photographic lens is divided by the half mirror toward the first camera and the second camera; and an optical system on the optical axis, the optical system being located on the light transmitting side of the half mirror; a mirror moving unit that retracts the half mirror away from a position on the optical axis and advances the half mirror toward the position on the optical axis; and an optical system moving unit that moves the optical system along the optical axis in accordance with a movement of the half mirror, the optical system moving unit correcting defocus attributable to both the retracting and the advancing of the half mirror.