Dual prism optical image stabilization
AssigneeGoogle Inc.
InventorsHyuk Jae Choi, Dansik Yoo, Zhenhong Fu, Calvin Kyaw Wong, Aram Afshar
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Abstract
A camera includes an image sensor, a lens configured to focus light to the image sensor, a first prism, a first actuator configured to rotate the first prism about a first axis, a second prism, and a second actuator configured to rotate the second prism about a second axis substantially perpendicular to the first axis. The camera also includes a controller configured to perform optical image stabilization (OIS) by independently controlling the first actuator to rotate the first prism about the first axis and controlling the second actuator to rotate the second prism about the second axis.
Claims19
A camera comprising:
- an image sensor;
- a lens configured to focus light to the image sensor;
- a first prism;
- a first actuator configured to rotate the first prism about a first axis;
- a second prism;
- a second actuator configured to rotate the second prism about a second axis substantially perpendicular to the first axis;
- and
- a controller configured to perform optical image stabilization (OIS) by independently controlling the first actuator to rotate the first prism about the first axis and controlling the second actuator to rotate the second prism about the second axis.
An optical system comprising:
- a lens defining an optical axis;
- a first prism configured to rotate about a first axis;
- and
- a second prism configured to rotate about a second axis substantially perpendicular to the first axis.
A method comprising:
- capturing, by an image sensor, an image;
- performing optical image stabilization (OIS) by:
- rotating, by a first actuator, a first prism of a camera about a first axis to scan an image in a first direction;
- and
- rotating, by a second actuator, a second prism of the camera about a second axis substantially perpendicular to the first axis to scan the image in a second direction independently from and substantially perpendicular to the first direction.
Dependencies are inferred from the claim text.