Imaging apparatus, imaging system, and imaging apparatus control method and program for setting a range of lens positions
AssigneeSony Corporation
InventorsYoshito Terashima, Hisashi Ishiwata
Life of this patent
Estimating the term…
Abstract
In an imaging apparatus, an imager generates an imaged picture by converting incident light from a subject that is incident via a focus lens. A setting unit sets, as a movement range for the focus lens, a range of focus lens positions corresponding to imaging magnifications where the rate of change in the imaging magnification lies within a fixed range from a basis, the basis being an imaging magnification corresponding to the position of the focus lens. A focus controller configured to conduct focus control with respect to the subject by moving the focus lens in the set movement range.
Claims10
An imaging apparatus comprising:
- an imager configured to generate an imaged picture by converting incident light from a subject that is incident via a focus lens;
- a setting unit configured to set a range of focus lens positions, as a first movement range for the focus lens, corresponding to imaging magnifications for which rate of change in the imaging magnification lies within a fixed range, wherein the fixed range is based on an imaging magnification corresponding to an in-focus position of the focus lens;
- and
- a focus controller configured to conduct focus control with respect to the subject by moving the focus lens in the set first movement range.
An imaging system comprising:
- an interchangeable lens that comprises:
- a plurality of optical members,
- a first communication unit configured to communicate with an imaging apparatus, and
- a storage unit configured to store imaging magnifications corresponding to respective states of the plurality of optical members;
- and
- the imaging apparatus comprises:
- a second communication unit configured to communicate with the interchangeable lens,
- an imager configured to generate an imaged picture by converting incident light from a subject that is incident via a focus lens,
- a setting unit configured to acquire an imaging magnification from the stored imaging magnifications in accordance with an in-focus position of the focus lens and set a range of focus lens positions, as a movement range for the focus lens, corresponding to the stored imaging magnifications for which rate of change in the imaging magnification lies within a fixed range, wherein the fixed range is based on the acquired imaging magnification corresponding to the in-focus position of the focus lens, and
- a focus controller configured to conduct focus control with respect to the subject by moving the focus lens in the set movement range.
An imaging apparatus control method, comprising:
- setting a range of focus lens positions, as a movement range for a focus lens, corresponding to imaging magnifications for which rate of change in the imaging magnification lies within a fixed range, wherein the fixed range is based on an imaging magnification corresponding to an in-focus position of the focus lens that supplies incident light from a subject to an imager that generates an imaged picture;
- and
- conducting focus control with respect to the subject by moving the focus lens in the set movement range.
A non-transitory computer-readable storage medium having stored thereon, a computer program having at least one code section executable by a computer, thereby causing the computer to execute steps of:
- setting a range of focus lens positions, as a movement range for a focus lens, corresponding to imaging magnifications for which rate of change in the imaging magnification lies within a fixed range, wherein the fixed range is based on an imaging magnification corresponding to an in-focus position of the focus lens that supplies incident light from a subject to an imager that generates an imaged picture;
- and
- conducting focus control with respect to the subject by moving the focus lens in the set movement range.
Dependencies are inferred from the claim text.