Lens device
AssigneeAsia Optical Co., Inc.
InventorSheng-Chieh Hwang
Life of this patent
Estimating the term…
Abstract
A lens device includes a focus lens unit mounted movably to a base, first and second lens units mounted in a main barrel, and a resilient light blocking sheet connected to the focus driving unit. The first and second lens units are movable in the in the main barrel along the axis between an extended position, where the first and second lens units cooperatively define a second gap therebetween, through which light passes and is reflected by the main barrel toward a first gap between the focus lens unit and the focus driving unit, and where the light blocking sheet spans the first gap so as to block passage of the light through the first gap, and a retracted position, where the second lens unit extends into the first gap and causes the light blocking sheet to flex.
Claims9
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.
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 gap therebetween;
- a main barrel connected to said base;
- a movable lens unit disposed movably in said main barrel, and including a lens frame and a lens that is secured in said lens frame and that corresponds in position to said focus lens unit, said movable lens unit being movable along the axis between an extended position, and a retracted position, where said lens frame extends into said 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 gap when said movable lens unit is at the extended position, and that is capable of flexing when pressed by said lens frame during movement of said movable lens unit to the retracted position.
Dependencies are inferred from the claim text.