Light intercepting apparatus of lens barrel
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorHitoshi Tanaka
Life of this patent
Estimating the term…
Abstract
A light intercepting apparatus of a lens barrel is provided in which at least two lens assemblies, provided in the lens barrel, are adjustable in an optical axis direction. The apparatus includes a cylindrical light intercepting member which isolates a light path, defined between the lens assemblies, from outside light, wherein the light intercepting member is expandable and contractable in accordance with the relative movement of the lens assemblies. The apparatus further includes a holding member which holds an end of the light intercepting member so that the light intercepting member may be expanded or contracted.
Claims15
A light intercepting apparatus of a lens barrel in which at least two lens assemblies, provided in the lens barrel, are adjustable in an optical axis direction, comprising;
- a cylindrical light intercepting member which isolates a light path defined between the lens assemblies from outside light, said light intercepting member being elastically expandable and contractable in accordance with relative movement of the lens assemblies;
- a holding member which holds an end of said light intercepting member at one end thereof to one of said at least two lens assemblies, so that said light intercepting member may be expanded or contracted;
- and
- a flanged member which is movable together with another of said at least two lens assemblies in the optical axis direction, wherein said light intercepting member comes into sliding contact at another end thereof with said flanged member so as to isolate the light path.
A light intercepting apparatus of a lens barrel in which at least two lens assemblies, provided in the lens barrel, are adjustable in an optical axis direction, comprising:
- lens holders which hold the respective lens assemblies, and are movable in said optical axis direction;
- a cylindrical light intercepting member which isolates a light path defined between the lens assemblies from outside light, said light intercepting member being made of an elastic material and being elastically expandable and contractable in accordance with relative movement of the lens assemblies;
- a holding member which holds an end of said light intercepting member so that said light intercepting member may be expanded or contracted, said light intercepting member being connected at one end thereof to one of said lens holders through said holding member so as to move together with the associated lens assembly;
- a flanged member which is movable together with another of said at least two lens assemblies in the optical axis direction, wherein said light intercepting member comes into sliding contact at another end thereof with said flanged member so as to isolate the light path.
A light intercepting apparatus of a lens barrel in which at least two lens assemblies, provided in the lens barrel, are adjustable in an optical axis direction, comprising:
- lens holders which hold the respective lens assemblies, and are movable in said optical axis direction;
- a cylindrical light intercepting member which isolates a light path defined between the lens assemblies from outside light, said light intercepting member being elastically expandable and contractable in accordance with relative movement of the lens assemblies;
- and,
- a holding member which holds an end of said light intercepting member so that said light intercepting member may be expanded or contracted, said holding member including a mounting ring which is provided on one end of said light intercepting member and which is provided with a claw which can be engaged by one of said movable lens holders.
Dependencies are inferred from the claim text.