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US 6,618,559 B1Granted
Zoom lens position calibration
AssigneeHewlett-Packard Development Company, L.P.
InventorGregory V. Hofer
Life of this patent
Estimating the term…
Abstract
A focal length position of a zoom lens is calibrated by performing at least one focal length adjustment, collecting a time period measurement for each focal length adjustment, and calculating a calibrated time to zoom to a desired focal length based on the time period measurements.
Claims33
A method of calibrating a zoom lens, comprising:
- performing at least one focal length adjustment of said zoom lens;
- collecting a time period measurement for each said at least one focal length adjustment;
- and
- calculating a calibrated time to zoom to a desired focal length based on said time period measurements.
1 more element
A method of calibrating a zoom lens, comprising:
- zooming said zoom lens over at least one range of focal lengths;
- collecting measurements during said zooming of at least one control variable that varies as a focal length of said zoom lens varies;
- and
- calculating a value of said at least one control variable based on said measurements.
1 more element
An imaging device, comprising:
- a zoom lens having at least one sensor that senses when said zoom lens is adjusted to one of a plurality of discrete focal lengths;
- means for zooming said zoom lens over at least one focal length range while collecting measurements of a control variable;
- and
- means for calculating a value for said control variable based on said measurements, wherein said value for said control variable enables said zoom lens to be positioned at a particular focal length.
1 more element
Dependencies are inferred from the claim text.