Lens barrel
AssigneeOlympus Optical Co., Ltd.
InventorsYoshinori Muto, Izumi Yamazaki, Takeshi Ito
Life of this patent
Estimating the term…
Abstract
A photographing lens apparatus includes a moveable lens frame having a shaft fixing portion to which a shaft for guiding movements of another moveable lens frame is affixed, and a lens retaining frame mounted to the moveable lens frame that integrally retains a plurality of lenses of different apertures and a predetermined diaphragm member disposed among the plurality of lenses. The shaft fixing portion is disposed such that at least a portion thereof overlaps a projected plane defined by a large aperture lens among the plurality of lenses retained by the lens retaining frame as viewed from a front face, and is also disposed in the vicinity of an outer peripheral portion of a small aperture lens among the plurality of lenses retained by the lens retaining frame.
Claims12
A photographing lens apparatus, comprising:
- an object lens retaining frame that integrally retains a plurality of lenses of different apertures and a diaphragm member disposed between a lens of a large aperture located at a front most position and a lens of a smaller aperture located at a position in the rear of the front most position among the plurality of lenses of different apertures;
- a first moveable lens frame that is moveable in a photographing optical axis direction and has a mounting section to which the object lens retaining frame is mounted and a shaft fixing section to which a shaft extending in parallel with the photographing optical axis direction is affixed, the shaft fixing section having at least a portion overlapping a projected plane defined by an external shape of the lens of a larger aperture retained by the object lens retaining frame as viewed from a front face side of the lens of a large aperture and being provided at a specified location within a region adjacent to an outer peripheral section of the lens of a smaller aperture;
- and
- a second moveable lens frame having a sleeve that freely, slidably engages the shaft and allows a group of moveable lenses different from the plurality of lenses of different apertures to move in the photographing optical axis direction.
A photographing lens apparatus, comprising:
- a first moveable lens frame having a shaft fixing section for mounting thereon a shaft that extends in a photographing optical axis direction and being moveable in the photographing optical axis direction;
- a second moveable lens frame having a sleeve that freely, slidably engages the shaft, and a member for restricting rotations thereof about the shaft, and being moveable along the photographing optical axis direction inside the first moveable lens frame;
- and
- an object lens retaining frame that is affixed to the first moveable lens frame on an object side thereof, and integrally retains a plurality of lenses of different apertures, the object lens retaining frame including a diaphragm member among the plurality of lenses,
- wherein the shaft fixing section is disposed within a projected plane defined by an outer shape of a large aperture lens on the object side and at a specified location in a region adjacent to an outer peripheral section of a small aperture lens among the plurality of lenses retained by the object lens retaining frame.
A photographing lens apparatus, comprising:
- an object lens retaining frame that integrally retains a plurality of lenses of different apertures and is equipped with a diaphragm member disposed among the plurality of lenses;
- and
- a linear movement guiding system including a shaft extending in an photographing optical axis direction and a sleeve that freely, slidably engages the shaft,
- wherein the shaft is affixed as a cantilever within a projected plane defined by an outer shape of a largest aperture lens located on an object side and at a specified location in a region adjacent to an outer peripheral section of a lens of a small aperture located in the rear of the largest aperture lens among the lenses retained by the object lens retaining frame.
Dependencies are inferred from the claim text.