Digital camera
AssigneesFUJIFILM Corporation, Fujinon Corporation
InventorsAkio Omiya, Yoshihiro Ito, Tahehiko Senba, Hiroshi Endo
Life of this patent
Estimating the term…
Abstract
In a digital camera, a solid state imaging device is used to catch subject light so that an image signal is created. The digital camera contributes to effectively implementing further thinness in such a manner that a part of image taking lenses is saved to a suitable position at the time of the collapse. Both the rear elements lens and the focus lens are revolved between a position on the optical axis and a saving position coming into a hollow portion beside the CCD solid state imaging device, or between the position on the optical axis and a saving position in which the front elements lens, the rear elements lens and focus lens form a line substantially on a plane.
Claims23
A digital camera that creates an image signal through catching a subject light, the digital camera comprising:
- an image taking lens, which is variable in a focal length, comprising three lens groups of a first lens group, a second lens group, and a third lens group in the named order with respect to an optical axis direction;
- a lens barrel that incorporates therein the image taking lens, having in front an aperture through which the image taking lens appears and having in rear an internal space defined by a wall, the lens barrel being free in extension and collapse and performing a focal length control;
- and
- a solid state imaging device that receives the subject light formed by the image taking lens to create the image signal, the solid state imaging device being supported by the wall,
- wherein the lens barrel has:
- a second lens group advancing and saving mechanism in which at the time of the collapse of the lens barrel, the second lens group is saved to a second lens group saving position out of an optical axis of the image taking lens, and at the time of the extension of the lens barrel, the second lens group is advanced onto the optical axis of the image taking lens;
- and
- a third lens group advancing and saving mechanism in which at the time of the collapse of the lens barrel, the third lens group is saved to a third lens group saving position out of the optical axis of the image taking lens, and at the time of the extension of the lens barrel, the third lens is advanced onto the optical axis of the image taking lens, and
- the third lens group is rotated about a shaft fixed to the wall of the lens barrel.
A digital camera that creates an image signal through catching a subject light, the digital camera comprising:
- an image taking lens, which is variable in a focal length, comprising three lens groups of a front elements lens, a rear elements lens, and a focus lens in the named order with respect to an optical axis direction, wherein a focusing is performed by a movement of the focus lens;
- a lens barrel that incorporates therein the image taking lens, having in front an aperture through which the image taking lens appears and having in rear an internal space defined by a wall, the lens barrel being free in extension and collapse and performing a focal length control;
- and
- a solid state imaging device that receives the subject light formed by the image taking lens to create the image signal, the solid state imaging device being supported by the wall,
- wherein the lens barrel has:
- a rear elements lens advancing and saving mechanism in which at the time of the collapse of the lens barrel, the rear elements lens is saved to a rear elements lens saving position out of an optical axis of the image taking lens, and at the time of the extension of the lens barrel, the rear elements lens is advanced onto the optical axis of the image taking lens;
- and
- a focus lens advancing and saving mechanism in which at the time of the collapse of the lens barrel, the focus lens is saved to a focus lens saving position out of the optical axis of the image taking lens, and at the time of the extension of the lens barrel, the focus lens is advanced onto the optical axis of the image taking lens, and
- the focus lens is rotated about a shaft fixed to the wall of the lens barrel.
Dependencies are inferred from the claim text.