Patent ID: 7397618

Claim:
A lens device comprising: a base; a focus lens unit mounted movably to said base; a focus driving unit mounted to said base, coupled to said focus lens unit, operable to drive said focus lens unit to move along an axis, and cooperating with said focus lens unit to form a first gap therebetween; a main barrel connected to said base and having an inner annular surface; a first lens unit disposed movably in said main barrel, and including a first lens frame and a first lens that is secured in said first lens frame and that corresponds in position to said focus lens unit; a second lens unit disposed movably in said main barrel, and including a second lens frame and a second lens that is secured in said second lens frame and that corresponds in position to said first lens; said first and second lens units being movable in said main barrel along the axis between an extended position, where said first and second lens units cooperatively define a second gap therebetween, through which light passes and is reflected by said inner annular surface of said main barrel toward said first gap, and a retracted position, where said second lens frame extends into said first gap; and a light blocking sheet made of a resilient material, and having a connecting portion that is connected to said focus driving unit, and a blocking portion that is disposed to span said first gap when said first and second lens units are at the extended position so as to block passage of the light reflected by said inner annular surface of said main barrel through said first gap, and that is capable of flexing when pressed by said second lens frame during movement of said first and second lens units to the retracted position.