Zoom optical system and imaging apparatus using the same
AssigneeOlympus Optical Co., Ltd.
InventorTetsuo Nagata
Life of this patent
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Abstract
A zoom optical system includes only one optical-element group moved in a magnification change and at least one deformable mirror having a compensating function for compensating for a shift of an image surface caused by the magnification change and a focusing function. According to this configuration of the zoom optical system, it is possible to attain a zoom optical system and an imaging apparatus using the zoom optical system that have as small a number of movable lenses as possible, are very small in size, and work with an extremely low power consumption and low operation noise.
Claims24
A zoom optical system comprising:
- an optical-element group moved in a magnification change;
- and
- a variable optical-property optical element,
- wherein the optical-element group is only one optical-element group that is moved in the magnification change, and
- wherein the variable optical-property optical element has at least one of a compensating function for compensating for a shift of an image surface caused by the magnification change and a focusing function.
A zoom optical system comprising:
- two optical-element groups;
- and
- a variable optical-property optical element,
- wherein the two optical-element groups are movable in a magnification change and have a magnification varying function or a compensating function for compensating for a shift of an image surface caused by the magnification change, and
- wherein the variable optical-property optical element has a focusing function.
Dependencies are inferred from the claim text.